| 6.6203.3a
Equipment specification | Specifications will be field verified as appropriate to site conditions by installer Equipment will be ENERGY STARĀ® qualified Settings will be maintained through power failure (auto restart) Dehumidification ventilator will be a ducted unit Dehumidification ventilator will be able to provide outside air | Efficiently remove humidity Ensure ease of operation Provide ventilation with outside air Ensure appropriate equipment is specified Ensure design and installation are feasible |
| 6.6203.3b
Sizing | System with enough capacity to handle humidity from outside air ventilation and internal gains will be selected Humidity levels inside space will be maintained at less than 60% Note: As outdoor temperature drops, indoor humidity will need to be low enough to prevent condensation in building enclosure
ASHRAE
ASHRAE
American Society of Heating, Refrigerating and Air-Conditioning Engineers, www.ashrae.org
62.2 and local code requirements should be followed for identifying design airflow rates within apartment dwelling units. All other areas will follow local code requirements and/or
ASHRAE
ASHRAE
American Society of Heating, Refrigerating and Air-Conditioning Engineers, www.ashrae.org
62.1-2010 requirements Air flows will be measured in accordance with
ANSI
ANSI
American National Standards Institute, www.ansi.org
/
ACCA
ACCA
Air Conditioning Contractors of America, www.acca.org
Standard 5 or
ANSI
ANSI
American National Standards Institute, www.ansi.org
/
ASHRAE
ASHRAE
American Society of Heating, Refrigerating and Air-Conditioning Engineers, www.ashrae.org
Standard 111 and adjusted to meet design requirements | Efficiently remove humidity Provide sufficient outdoor air to desired locations Avoid moisture problems associated with over ventilation in a hot and humid climate |
| 6.6203.3c
Access | Equipment will be located in an area with access to heating, ventilation, and air conditioning supply trunk line or plenum, outside air (where applicable) Fans,
service switch
Service switch
An electrical switch that controls the complete flow of electricity to a mechanical device
, filters, drain, and drain pan will be accessible for maintenance or replacement | Easily maintain equipment Maintain designed air flows and system performance Ensure occupant health and safety |
| 6.6203.3d
Installation | Installation will be in accordance with manufacturer specifications and local codes Dehumidifying ventilator will be mounted securely in accordance with manufacturer specifications and local code requirements (in terms of seismic restraints) Dehumidifying ventilator will be oriented so the equivalent length of the duct run is as short as possible Dehumidifying ventilator will be isolated from the building framing unless specifically designed to be directly attached | Maintain manufacturer warranty and proper installation Ensure short duct runs achieve optimum air flows Ensure dehumidifying ventilator is mounted securely Ensure dehumidifying ventilator housing or building framing does not shake, rattle, or hum when operating Minimize noise |
| 6.6203.3e
Controls | Dehumidistat controls will be located near thermostat | Ensure system operation controls the humidity |
| 6.6203.3f
Wiring | Wiring will be installed by a licensed contractor Wiring will be installed in accordance with original equipment manufacturer specifications, and local and national electrical and mechanical codes Refer to
NFPA
NFPA
National Fire Protection Association, www.nfpa.org
70: National Electrical Code for installation requirements | Prevent an electrical hazard |
| 6.6203.3g
Condensate drain | Condensation shall be drained to a location approved by the local jurisdiction | Prevent moisture problems |
| 6.6203.3h
New connecting ductwork | All exposed ductwork outside of the building will be insulated to a minimum R-12, protected from weather exposure, and sealed at all penetrations into building shell All ductwork outside of conditioned space will be insulated to a minimum of R-8 | Ensure durability and energy efficiency of ductwork |
| 6.6203.3i
Distribution systems | Note: Dehumidifying ventilator provides the outdoor air supply fan The rest of the ventilation system will be installed in accordance with SWS 6.6202.6 Heat Recovery Ventilation and Energy Recovery Ventilator Installation in Single Dwelling Unit (note: exhaust side does not apply) | Achieve the desired air flows to and from the desired locations Preserve integrity of the duct system and building
envelope
Envelope
The separation between the interior and exterior environments of a building that includes a combination of air and thermal barrier
|
| 6.6203.3j
Verification | Verification of the dehumidification unit and controls will be performed and documented | Ensure the performance of the ventilation system Ensure occupant health and safety |
| 6.6203.3k
Fire dampers | Fire dampers must be accessible for inspection and/or testing by the local authorities; if fire dampers are not accessible from a grill or register, an access door in the ductwork is required Sealing activities will not interfere with the operation of fire dampers, balancing dampers, or backdraft dampers Type B fire dampers will be used as required by fire code | Ensure access to fire dampers for safe operation Minimize static pressure Maximize air flow |
| 6.6203.3l
Occupant/property manager education | Occupant/property manager will be educated on purpose of system, and how and when to change filter and clean drain pan, if applicable, in accordance with manufacturer specifications | Ensure occupant health and safety Preserve integrity of system |