Can The Location Of The Registers Affect An Air Co Ditioner

The main purposes of a Heating, Ventilation and Air-Conditioning (HVAC) arrangement are to help maintain practiced indoor air quality through acceptable ventilation with filtration and provide thermal condolement. HVAC systems are among the largest energy consumers in schools. The choice and design of the HVAC system can too touch on many other high operation goals, including h2o consumption (water cooled ac equipment) and acoustics.

The post-obit actions particular how engineers tin can design a quality arrangement that is price-competitive with traditional ventilation designs, while successfully providing an appropriate quantity and quality of outdoor air, lower energy costs and easier maintenance.

On this page:

Codes and Standards
Potential for Natural Ventilation and Operable Windows
Option of HVAC Equipment
- Energy Recovery Ventilation
Location of Outdoor Air Intakes and Exhaust
Outdoor Air Quantity
Air Filtration
- Filter Efficiency
- Force per unit area Drop
- Monitoring Pressure
- Air Cleaning for Gaseous Contaminants
Ventilation Controls
- Book Monitoring and Command
Moisture and Humidity Command
Air Distribution
- Types of Air Distribution
Exhaust Air
Designing for Efficient Operations and Maintenance
Commissioning
References and Resources

Codes and Standards

The national consensus standard for exterior air ventilation is ASHRAE Standard 62.i-2010, Ventilation for Adequate Indoor Air Quality and its published Addenda. This standard is often incorporated into land and local building codes and specifies the amounts of outside air that must be provided past natural or mechanical ventilation systems to various areas of the schoolhouse, including classrooms, gymnasiums, kitchens and other special use areas.

Many state codes as well specify minimum energy efficiency requirements, ventilation controls, pipe and duct insulation and sealing and system sizing, among other factors. In addition, some states and localities have established ventilation and/or other indoor air quality related requirements that must also be followed.

Blueprint in accordance with ASHRAE standards Blueprint systems to provide outdoor air ventilation in accord with ASHRAE Standard 62.i-2007 and thermal condolement in accord with ASHRAE Standard 55–1992 (with 1995 Addenda) Thermal Ecology Conditions for Human Occupancy.
Ensure familiarity with and adherence to, all country and local edifice codes and standards.

Standards are available at ASHRAE

Potential for Natural Ventilation and Operable Windows

In some parts of the country, where temperature and humidity levels permit, natural ventilation through operable windows can exist an effective and energy-efficient way to supplement HVAC systems to provide exterior air ventilation, cooling and thermal comfort when conditions permit (e.g., temperature, humidity, outdoor air pollution levels, precipitation). Windows that open and close can enhance occupants' sense of well-being and feeling of control over their environs. They can also provide supplemental exhaust ventilation during renovation activities that may introduce pollutants into the space.

However, sealed buildings with appropriately designed and operated HVAC systems can oftentimes provide better indoor air quality than a edifice with operable windows. Uncontrolled ventilation with outdoor air can permit outdoor air contaminants to bypass filters, potentially disrupt the balance of the mechanical ventilation equipment and permit the introduction of excess moisture if admission is not controlled.

Strategies using natural ventilation include wind driven cantankerous-ventilation and stack ventilation that employs the divergence in air densities to provide air movement across a infinite. Both types of natural ventilation crave careful engineering to ensure convective flows. The proper sizing and placement of openings is critical and the menstruum of air from entry to exit must not be obstructed (due east.g., past closed perimeter rooms).

Designers should consider the use of natural ventilation and operable windows to supplement mechanical ventilation. Consider outdoor sources of pollutants (including building exhausts and vehicle traffic) and noise when determining if and where to provide operable windows.
If operable windows will exist used to supplement the HVAC arrangement, ensure that:
- openings for outdoor air are located between 3-6 feet from the flooring (head height);
- the windows are adjustable and can close tightly and deeply;
- the windows are placed to accept maximum advantage of wind direction, with openings on contrary sides of the edifice to maximize cross-ventilation.

Pick of HVAC Equipment

In most parts of the country, climatic conditions require that outdoor air must be heated and cooled to provide adequate thermal comfort for building occupants, requiring the improver of HVAC systems. The selection of equipment for heating, cooling and ventilating the school building is a circuitous blueprint decision that must balance a bang-up many factors, including:

heating and cooling needs
energy efficiency
humidity control
potential for natural ventilation
adherence to codes and standards
outdoor air quantity and quality
indoor air quality
toll

Where feasible, use key HVAC air handling units (AHUs) that serve multiple rooms in lieu of unit ventilators or individual oestrus pumps. Although in that location are many dissimilar types of air treatment units, for general IAQ implications in schools, air handling units tin can be divided into two groups: unit ventilators and individual heat pump units that serve a single room without ducts; and central air handling units that serve several rooms via duct piece of work.

Unit of measurement ventilators and estrus pumps take the advantage of reduced floor space requirements and they do non recirculate air between rooms. Even so, it is more difficult to assure proper maintenance of multiple units over time and they present additional opportunities for moisture problems through the wall penetration and from drain pan and discharge bug. Fundamental air handling units take a number of advantages equally compared to unit ventilators and heat pumps serving individual rooms. They are:

Quieter and therefore more likely to be turned on or left on by teachers and staff;
Less drafty due to multiple supplies and a return that is away from occupants;
Better at decision-making humidity and condensed moisture drainage;
Easier to maintain due to reduced number of components and few units to access;
More than space around units and can exist accessed without interfering with course activities;
Space for college efficiency air filters and more surface area;
Fabricated of heavier duty components;
Less likely to have quantity of outdoor air supply inadvertently reduced.

Specify the post-obit features for all air treatment units:

Double-sloped bleed pan and bleed trap depth

Double-sloped bleed pan - A double-sloped pan prevents water from standing and stagnating in the pan.
Not-corroding drain pan - Made from stainless steel or plastic. Prevents corrosion that would cause h2o to leak within the AHU.
Piece of cake admission doors - All access doors are hinged and use quick release latches that do not crave tools to open. Easy admission to filters, drain pans and cooling coils is imperative.
Double wall cabinet - The inner wall protects the insulation from wet and mechanical damage, increases audio dampening and is easier to make clean.
Tightly sealed cabinet - Pocket-sized notwithstanding continuous air leaks in and out of the AHU cabinet can affect IAQ and energy. The greatest pressure differentials driving leaks occur at the AHU.
Double wall doors with gaskets - Double wall doors provide better thermal and acoustic insulation and will remain flatter, allowing a ameliorate seal against door frame gaskets
Minimum two inch thick filter slots - For better protection of the indoor environment, also as the equipment and ducts, the filters slots should be able to adapt ii in. or thicker filters.
Extended surface area filter bank - To reduce the frequency of filter maintenance and the cost of fan energy, the banking concern is designed to let more filter expanse, such equally the deep Five approach or bags.
Air filter assemblies (racks & housings) designed for minimum leakage - The filter depository financial institution should take gaskets and sealants at all points where air could easily featherbed the air filters, such as betwixt the filter rack and the access door. Use properly gasketed manufacturer supplied filter rack spacers.
Air filter monitor - A differential pressure approximate to indicate the static pressure drop across the filter bank. This feature could easily be installed as an option in the field.
Corrosion resistant dampers & links - All moving parts such as pin pins, damper actuators and linkages are able to withstand weather and moisture-induced corrosion for the total life of the system

Energy Recovery Ventilation

Consider specifying energy recovery ventilation equipment.

Indoor air can be 2 to v times more polluted than outdoor air; therefore, most HVAC system designers understand that increased amounts of outdoor air supply is mostly better for IAQ. Nevertheless there are concerns over the implications that this added corporeality of outdoor air supply has on the offset cost and operating toll of the HVAC system, as well as moisture control for the school (besides wet or too dry out).

As a result, school designers often endeavor to reduce the amount of outdoor air equal to — or even beneath — xv cubic feet per minute (cfm) of outside air per person, the minimum for school classrooms, as established by the American Guild of Heating, Refrigerating and Air -conditioning Engineers (ASHRAE) ASHRAE. In many parts of the country these concerns can easily be addressed by awarding of basic engineering principles and off-the-shelf HVAC equipment.

Get-go price, free energy costs and moisture control do not have to be at odds with adept IAQ. Free energy recovery ventilation equipment tin can make the negative implications of fifteen cfm per person of outdoor air comport like 5 cfm, while retaining the IAQ advantage of fifteen cfm. This approach has been proven in many schools in various regions east of the Rockies, where advanced HVAC systems toll roughly the same as conventional systems, yet provide pregnant operating cost savings and IAQ advantages.

Location of Outdoor Air Intakes and Exhaust

Sloped Intake Plenum and Attainable Intake Screen

Proper location of outdoor air intakes can minimize the blockage of airflow and intake of contaminated air. The bottom of air intakes should exist at to the lowest degree eight inches to a higher place horizontal surfaces (generally the ground or the roof) to prevent blockage from leaves or snow. In northern locations, more separation may exist needed due to greater snow depths or drifting snow.
Intakes should not be placed within 25 feet of any potential sources of air contaminants, including sewer vents, exhaust air from the school, loading docks, double-decker loading areas, garbage receptacles, banality or generator exhausts and mist from cooling towers. If the source is large or contains strong contaminants, or if at that place is a dominant wind direction in the area, the minimum separation altitude may need to be increased. Air admittance valves, an inexpensive and code-canonical one-manner air valve, can be added to sewer vents to eliminate the potential for release of gases into the surrounding air.
Grilles protecting air intakes should be bird- and rodent-proofed to prevent perching, roosting and nesting. Waste from birds and other pests (east.g., rats) can disrupt proper operation of the HVAC system, promote microbial growth and cause human illness. The use of outdoor air intake grilles with vertical louvers, as opposed to horizontal louvers, will reduce the potential for roosting.
Intake Screens must be accessible for inspection and cleaning. In existing schools, an insufficient amount of ventilation air is often the result of clogged intake screens that are inaccessible for inspection and cleaning. Screens hidden by an intake grille should be designed with a grille that is easily opened, such as a hinged grille with two quick-release latches, or in the worst example, a grille with four one-quarter turn fasteners. All screens should be easily removable for cleaning.
Consider adding a section of sloped intake plenum that causes moisture to menses to the outside or to a drain if intake grilles are not designed to completely eliminate the intake of rain or snowfall.

Outdoor Air Quantity

Classrooms and other school spaces must be ventilated to remove odors and other pollutants.

The national consensus standard for exterior air ventilation is ASHRAE Standard 62.1-2001, available at ASHRAE

If outside air is provided through a mechanical arrangement, then at least 15 cubic feet per infinitesimal (cfm) of outside air must exist provided for each occupant. A typical classroom with 30 people requires a minimum of 15 x 30 or 450 cfm of outside air.

In spaces where the number of occupants is highly variable such as gyms, auditoriums and multipurpose spaces, demand controlled ventilation (DCV) systems can be used to vary the quantity of outside air ventilation in these spaces in response to the number of occupants. One technique for doing this is to install carbon dioxide (CO_ii) sensors that measure concentrations and vary the volume of outside air appropriately.

If an auditorium fills upwardly for school associates, then CO₂ concentrations will increase, a signal will exist provided to the HVAC organisation and outside air volumes will be increased appropriately. When the spaces served by an air handler have highly variable occupancy, this type of control tin both save energy and assist control moisture (and mold) by reducing the quantity of humid outside air when it is not needed for ventilation. CO₂ and other sensors must exist periodically calibrated and maintained.

Air Filtration

In add-on to "atmospheric grit," airborne particulates tin include pollen, mold (fungal) spores, creature dander, insect proteins, pesticides, lead and infectious bacteria and viruses. Designers can integrate features into the ventilation system that will provide benefits for the school occupants as well as the efficiency and longevity of the HVAC organization. In addition, these features can reduce the demand for expensive cleaning of the duct piece of work and air handling units.

Filter Efficiency

Air filters should have a grit-spot rating between 35% and 80% or a Minimum Efficiency Rating Value (MERV) of between 8 and 13. The college the rating, the ameliorate the protection for the equipment and the occupants. Information technology has been estimated that a xxx% increment in static pressure across a curl results in a $200 per 10,000 cfm of air movement (at 7 cents per KWH). This does non include the added toll of cleaning dirty heating or cooling oils, drain pans, or air ducts. Designers should consider specifying a low efficiency (~10%) pre-filter upstream of the main filters. The pre-filters are generally piece of cake and inexpensive to change and will capture a meaning amount of the particulate mass in the air thereby extending the useful life of the more expensive main filters.
- Come across ASHRAE Standard 52.2-1999 Method of Testing General Ventilation Air Cleaning Devices for Removal Efficiency by Particle Size bachelor at ASHRAE

Pressure Drop

Design more filter surface expanse into ventilation systems. This has two advantages: the number of filter changes each year is reduced, thereby reducing the cost of labor to properly maintain the filters; and static pressure loss is lower, which saves coin by reducing the amount of power needed to operate fans and blowers. Since different filter media are approximately proportional in their efficiency/pressure drop ratio, the most effective method for reducing force per unit area drop is to design more filter surface expanse into the filter system. This can be done by the specification of a filter with larger amounts of surface area, such every bit a pleated filter or bag filter. The side by side method is to increase the number and/or size of the filters in the airstream, for instance, by mounting the filter slots in a "V" pattern, rather than a filter rack that is simply apartment and perpendicular to the airstream.

Monitoring Pressure

Consider installing a simple pressure differential approximate across all filter banks. This will prevent school facilities personnel from having to guess whether the filter is set for replacement. A gauge with a range of zero to 1.0 in. w.g. can salve money and the environment by preventing premature disposal of filters that still accept useful life and tin can prevent wellness and maintenance problems caused past overloaded filters that take diddled out. The gauge should be hands visible from a continuing position in an hands accessed location near the air treatment unit of measurement.

Air Cleaning for Gaseous Contaminants

The near effective means of reducing exposure of occupants to gases and VOCs is to manage and command potential pollution sources. Filters are available to remove gases and volatile organic contaminants from ventilation air; all the same, because of toll and maintenance requirements, these systems are not generally used in normal occupancy buildings or schools. In specially designed HVAC systems, permanganate oxidizers and activated charcoal may be used for gaseous removal filters.

Some manufacturers offer "partial bypass" carbon filters and carbon impregnated filters to reduce volatile organics in the ventilation air of office environments. Gaseous filters must exist regularly maintained (replaced or regenerated) in order for the system to continue to operate effectively.

See too "Residential Air Cleaners (2nd Edition): A Summary of Available Information."

Ventilation Controls

Although a typical HVAC arrangement has many controls, the control of outdoor air quantity that enters the edifice can have a significant impact on IAQ, notwithstanding typically is non office of standard practice. Need controlled ventilation is addressed as a method of humidity control, merely is non otherwise discussed here because its primary use is to reduce the supply of outdoor air below the recommended minimum for the purposes of saving free energy, non for improving IAQ.

See more than about Humidity Command

Volume Monitoring and Control

Supplying acceptable quantities of outdoor air to occupied spaces is a critical component of good indoor air quality. Yet well-nigh all school ventilation systems cannot point whether outdoor air is fifty-fifty beingness supplied to the school, much less estimate the quantity of that air. Nigh all existing school ventilation systems rely upon a stock-still damper to regulate the amount of outdoor air.

Yet air current, stack effect, unbalanced supply and render fans and constantly changing variable air volume (VAV) systems can cause significant nether- or over-ventilation, which can affect IAQ and energy costs. Combinations of these effects can even cause the intake system to actually exhaust air.

Specify the addition of a measuring station that actively controls the amount of outdoor airflow by modulating the outdoor air damper and the return (recirculation) damper, if needed to overcome wind and stack effects. These measuring stations are designed to work in express duct infinite and with depression air velocities. This is an piece of cake job, equally some manufacturers offer their airflow measuring stations in separate packages with dampers and actuators and others are built into the AHU at the factory.

Moisture and Humidity Control

Uncontrolled wet indoors tin cause major damage to the building structure, also as to effects and to finish materials similar floors, walls and ceilings. Uncontrolled moisture can trigger mold growth which not simply damages the school facility, but tin lead to wellness and performance issues for students and staff.

Primary causes of indoor moisture bug in new schools include:

Utilise of building materials that were repeatedly or deeply wetted before the edifice was fully enclosed
Poor control of rain and snow, resulting in roof and flashing leaks
Moisture or clammy construction cavities
Wet-laden outdoor air entering the edifice
Condensation on cool surfaces

Decision-making moisture entry into buildings and preventing condensation are critical in protecting buildings from mold and other moisture-related problems, including harm to building components.

Visit the Moisture Control page for more than moisture information.

Air Distribution and Duct Insulation

Dirt and wet should not be present in duct systems and must be controlled to forestall mold growth. Nevertheless, it is not always possible to clinch that ducts remain dirt and moisture free. In many existing schools, sheet metal ducts, too as those synthetic of or lined with insulation products, are often contaminated with mold because dirt and moisture found their way into the organization.

Duct board and duct liner are widely used in duct systems because of their splendid audio-visual, thermal and condensation command properties. If the HVAC system is properly designed, made, installed, operated and maintained, these duct systems pose no greater risk of mold growth than duct systems fabricated of canvas metallic or whatever other materials.

Withal, the very properties that make duct board and duct liner superior insulators (east.yard., a gristly structure with big surface area that creates insulating air pockets), besides makes them capable of trapping and retaining moisture if they exercise get moisture (though the fibers themselves do not blot wet).

While at that place is an ongoing fence virtually the wisdom of using insulation materials in duct systems that might retain moisture longer, all sides hold that extraordinary attention to preventing wet contamination of the duct work should be the main strategy for preventing mold growth. Run across ANSI/ASHRAE Addenda 62t and 62w, Addenda to ANSI/ASHRAE Standard 62-2001, Ventilation for Acceptable Indoor Air Quality.

As a secondary strategy, designers should consider methods of reducing the potential for time to come problems to occur due to unforeseen moisture contamination by investigating insulation products at present on the market that minimize the potential for wet to penetrate the insulation textile. These include foil vapor retarders, tightly bonded non-woven vapor retarders, butt or shiplap edges and other techniques that take been developed by insulation manufacturers to address concerns about moisture.

Pay special attention to preventing moisture from entering duct work. Preventing wet from entering duct work is critical to preventing mold bug in all types of ducts. Wet in ducts is commonly due to penetration of precipitation through inlet louvers, excess moisture in outdoor air, or condensation droplets from cooling coils that are not properly drained or ducts that are not properly sealed. Under certain circumstances, when exceeding recommended maximum cooling coil face velocity, water droplets tin escape cooling coils and be carried into the air stream, saturating whatsoever dirt or dust downstream. Considering dust and dirt serve as a food source for mold and are usually present in all just make new duct systems, mold will grow on whatsoever duct surface that remains wet.
If specifying duct lath or internal duct lining for thermal and/or acoustical control, exist sure to consider the potential for uncontrolled moisture to enter the duct over the life of the organization. Select products that will minimize the potential for moisture retention in the event of unforeseen contamination of the duct arrangement, such every bit those with properties that reduce the potential for moisture to penetrate the air stream surface. Ensure that all duct systems are properly made and installed.
Degrease canvas metallic air ducts. The sheet steel used to make ducts has a thin petroleum or fish oil coating primarily intended to inhibit corrosion during transportation and storage of the steel. This coating may trap dirt particles, some people find the odor objectionable and in that location are concerns that the emissions from the blanket could impact individuals with asthma or allergies. One solution is to remove the coating from the duct using a mild cleaning agent, such as a household dishwashing liquid, in conjunction with a heated high-pressure sprayer.
Seal air ducts to forestall HVAC system air leakage. In addition to significant energy losses, air leakage from HVAC ducts and air handling units cause significant IAQ bug due to unexpected airflow between indoors and outdoors and between areas within the schoolhouse. Air leakage from supply or return duct work contributes to the condensation of humid air in edifice cavities and/or on the neighboring surfaces. Air leakage tin can exist especially problematic for ducts or AHUs that are located outside the conditioned spaces. The primary goals for the designer are to keep all air ducts within the conditioned space and to specify that the joints and seams of all ducts, including return ducts, are sealed using an advisable cloth.

Types of Air Distribution

Well-nigh all schools currently use the mixed-airflow method for distribution and dilution of the air within the occupied space. Designers should investigate a method chosen vertical displacement ventilation or thermal displacement ventilation. This arroyo successfully uses natural convection forces to reduce fan free energy and carefully lift air contaminants up and away from the animate zone.

Frazzle Air

Quick removal of concentrated air contaminants and building pressurization are two ways that exhaust systems affect IAQ. Special use areas such as science labs, vocational/technical shops, cafeterias and indoor pools already accept well established regulatory codes regarding ventilation with outdoor air and negative force per unit area requirements with respect to adjacent spaces. Less well recognized areas in schools where special exhaust ventilation is desirable are janitor closets, copy/work rooms and arts/crafts preparation areas where off-gasing from significant quantities of materials or products may occur. These areas should be maintained under negative pressure relative to next spaces.

Provide exhaust ventilation for janitor'southward closets. If housekeeping and maintenance supplies are properly stored in janitor closets, only enough air demand be exhausted to identify the cupboard under negative force per unit area relative to surrounding rooms. As long as air does not hands leak into or from the closet through openings such as plenums or utility chases, 10 CFM of air exhausted from the room volition typically make it negative and forbid the buildup of air pollutants.
Provide frazzle ventilation for re-create/piece of work rooms. In addition to the lawmaking-required corporeality of outdoor air beingness supplied to this room for general ventilation, information technology is desirable to decide what types of equipment and activities the school plans for this room and to supply special exhaust ventilation for concentrated pollutant sources. Two examples of sources are re-create machines and piece of work areas for adhesives.
Virtually copier manufacturers tin can provide an optional vent kit, which is ordinarily a simple plastic plumbing fixtures, that allows a piece of 3" or 4" diameter flexible duct to be connected between the copier and an exhaust fan. This captures much of the heat, particles, ozone and other pollutants and exhausts them outdoors earlier they can spread throughout the workroom. A small exhaust hood over a piece of work surface, similar to a fume hood in a scientific discipline lab, would too be helpful to reduce exposure when adhesives, sprays, paints and solvents are being used in the workroom.
Provide exhaust ventilation for craft grooming areas where off-gassing from meaning quantities of materials or products may occur.
Consider specifying a differential force per unit area monitor to monitor building pressurization. IAQ problems are oftentimes traced to improper pressurization, which causes unexpected airflow between indoors and outdoors and between areas within the schoolhouse. To reduce introduction of unconditioned moist air and pollutants from outdoors, the building should exist designed to operate between aught and 0.03 in. w.k. (0 to seven Pa) positive, relative to outdoors.
Exercise not operate frazzle systems when the HVAC organisation is turned off to avert bringing in unconditioned moist air that may condense on cooler indoor surfaces.

Designing for Efficient Operations and Maintenance

Ensure that all system components, including air handling units, controls and frazzle fans are hands accessible.

To help ensure that proper operation and maintenance of HVAC system components will exist performed, information technology is disquisitional that the designer makes the components easily accessible. AHUs, controls and exhaust fans should not require a ladder, the removal of ceiling tiles, or itch to gain access. Rooftop equipment should exist accessible past mode of stairs and a full-sized door, not a fixed ladder and a hatch.

Characterization HVAC system components to facilitate operations and maintenance.

Labeling of HVAC components is an inexpensive and effective method for helping facilities personnel properly operate and maintain the HVAC systems. The labels should be easy to read when standing next to the equipment and durable to match the life of the equipment to which they are fastened. At a minimum, the following components should exist labeled in each ventilation zone of the school and should correspond with the HVAC diagrams and drawings. "AHU" refers to any air treatment unit that is associated with outdoor air supply.

checkmark

The number or name of the AHU (eastward.g., AHU ##, or AHU for West Fly)

checkmark

The outdoor air (OA), supply air (SA), return air (RA) and exhaust or relief air (EA) connections to the AHU, each with arrows noting proper airflow direction

checkmark

The access door(s) for the air filters and the minimum filter dust-spot (or MERV) efficiency (Air Filters, minimum twenty% dust spot efficiency)

checkmark

The filter pressure guess and the recommended filter modify pressure (Filter Force per unit area, max 0.ten in. westward.g.)

checkmark

The access door(s) for the condensate bleed pan (Bleed Pan)

checkmark

Other pertinent access doors such as to energy recovery ventilation wheels or plates (Energy Recovery Ventilation Unit)

checkmark

The minimum corporeality of outdoor air for each AHU (### CFM minimum during occupied times)

checkmark

The outdoor air damper (OA Damper), with special marks noting when the damper is in the fully airtight (Closed), fully opened (open) and minimum designed position (Min)

checkmark

If a motorized relief damper is installed (EA Damper), annotation the aforementioned positions as in a higher place.

checkmark

The access door to whatever outdoor air controls (OA Control(s)) such as damper position adjustments, outdoor airflow measuring stations, resets, fuses and switches)

checkmark

Breakers for exhaust fans (Exhaust Fan ##), AHU, unit ventilators

checkmark

Access doors for inspection and maintenance of air ducts

checkmark

Whatsoever dampers and controls for air side economizers (every bit advisable)

checkmark

The number or proper name of all exhaust fans, including the air quantity exhausted (EF##, ###CFM)

Commissioning

Edifice commissioning is a quality assurance plan that is intended to show that the building is synthetic and performs as designed.

More data on commissioning HVAC and other edifice systems

Committee key building systems.

Engage a commissioning agent (the person responsible for implementing the commissioning plan) during the schematic pattern phase or earlier. The agent may be a fellow member of the design team, an independent contractor, or a member of the schoolhouse district staff;
Collect and review documentation on the design intent;
Make sure commissioning requirements are included in the construction documents;
Write a commissioning plan and use it throughout blueprint and construction;
Verify installation and functional performance of systems;
Document results and develop a commissioning report.

References and Resources

IAQ Tools for Schools Action Kit EPA document 402-Chiliad-07-008, January 2009
Building Air Quality: A Guide for Building Owners and Facility Managers EPA document # 402-F-91-102, Dec 1991
Energy Efficiency and Indoor Air Quality in Schools Businesses : Energy STAR
High Performance Edifice Guidelines (PDF)(146 pp, 2.2 MB, Most PDF), Apr, 1997, city of New York, Department of Design and Construction
Collaborative for High Performance Schools (CHPS): CHPS has developed a best practices manual to help schools, districts and practitioners to achieve high operation design, construction and operation
Humidity Control Design Guide for Commercial and Institutional Buildings. Harriman, Brundrett and Kittler. American Club of Heating, Refrigerating and Air-conditioning Engineers. ISBN ane-883413-98-ii.
The Sheet Metallic and Ac Contractor'due south National Association (SMACNA) IAQ Guidelines for Occupied Buildings Under Construction