Ventilator Dehumidifiers

Equipment must be ENERGY STAR^® rated and must have an auto-restart to maintain settings through power failures

Dehumidification ventilator will be a ducted unit and will provide outside air to the home or space

Size the system with enough capacity to handle humidity from outside air ventilation and internal gains

Maintain humidity levels inside the home at less than 60% relative humidity

For residential applications, follow ASHRAE 62.2 and local code requirements to identify design airflow rates within dwelling units

For commercial applications, follow local code requirements and/or ASHRAE 62.1 requirements

Locate equipment in an area with access to HVAC supply trunk line or plenum, and orient outside air intake so the effective length of the duct run is as short as possible

Mount ventilator using mechanical fasteners per manufacturer's specifications and applicable code (e.g., seismic restraints)

Isolate unit from the building framing unless specifically designed to be directly attached

Install ventilator according to manufacturer specifications and applicable code

Install all electrical wiring according to manufacturer specifications and applicable code

Install dehumidistat in accordance with manufacturer specifications

Operation of the dehumidifier will be based upon humidity/temperature in the return air, or will provide supply air at a specified temperature and humidity

Seal all air moving portions of the system using UL 181 products without interfering with the function of dampers

Connect condensate drain according to manufacturer specifications to a drain location approved by applicable code

Insulate all condensate lines outside the thermal boundary to a minimum of R-4

Ensure fan, service disconnect switch, filters, and drains are accessible for maintenance according to NEC, or applicable building code

If fire dampers are required in the fresh air supply duct, install them according to applicable building code

Fire dampers must be accessible for inspection and/or testing

Sealing activities must not interfere with the operation of fire dampers, balancing dampers, or backdraft dampers