Fresh Air Supply System

The fresh air supply ductwork from the HRV may be directly connected to the return air duct of the forced air system. Check the air flow balance of the HRV with the air handler blower both “ON” and “OFF” to determine that it does not imbalance the HRV more than 10%. Also, it is advisable to include a short length of flex duct or other non-metallic connector in this hard ducted line in order to keep the HRV acoustically iso- lated and separately grounded (electrically) from the air handler. This will avoid a possible shock hazard to service people if a short to ground develops in one of the devices.

It may be necessary to install a separate fresh air supply ductwork system if the heating is other than forced air.

When installing an HRV, the designer and installer should be aware of local codes that may require smoke detectors and/or firestats in the HVAC or HRV ductwork.

Because an HRV is designed to bring fresh air into the building, structures may require supply voltage interrupt when smoke or flame sensors are triggered, or when a central fore alarm system is activated.

Supply air grilles may be ceiling or high wall mounted. Avoid locating incoming fresh air grilles that could cause a direct draft on the occupants as the incoming air may be below room temperature. A reheat duct heater can be installed to improve occupant comfort.

The use of balancing dampers or adjustable grilles to balance the flow rates into various rooms is recommended.

The use of balancing dampers or adjustable grilles as supply air diffusers and air exhaust covers are recommended. TECHGRILLES™ are round, efficient, sound absorbing devices available in 4”, 5”, 6” and 8” (100, 125, 150, and 200 mm) models.

AIR FLOW

SUPPLY

AIR FLOW

EXHAUST

TECHGRILLE

(optional) schematic

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Lifebreath 700DDPOOL, 1000RHCAC, 1200DDPOOL installation manual Fresh Air Supply System

1200DDPOOL, 700DDPOOL, 1000RHCAC, 1000RHC specifications

Lifebreath is a brand renowned for its commitment to energy-efficient indoor air quality solutions. Among their offerings, the Lifebreath 700DDPOOL, 1200DDPOOL, 1000RHCAC, and 1000RHC stand out as exemplary products designed for various residential and commercial settings. These units leverage cutting-edge technologies to provide superior ventilation, heat recovery, and air quality management.

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