BrHEAThe System

The BrHEAThe system is an integrated heating and ventilation system developed by CCHRC that reduces energy costs while maintaining healthy indoor air quality. CCHRC installed the system in prototype homes in Anaktuvuk Pass (2012), the Sustainable Village at the University of Alaska Fairbanks (2012) and Buckland (2013). 

The BrHEAThe system marries together heating and ventilation so that incoming air is always hot and fresh. Fresh air is brought in through the HRV and recovers heat from outgoing stale air. Then it enters a filter box and passes through a heat exchanger, robbing heat from a loop that’s connected to a boiler. The air is warmed from approximately 40 degrees up to 140 degrees. This heated air is then distributed through ductwork throughout the home. The high efficiency boiler also heats a domestic hot water tank.

As homes are becoming tighter and more energy efficient, mechanical ventilation is needed to maintain healthy indoor air quality. HRVs ensure a constant supply of fresh air, and are far more energy efficient than exhaust-only ventilation systems. However some residents complain that HRVs bring in cold air and use too much electricity (an in-line electric heater is often used to boost the temperature of ventilation air). The BrHEAThe system addresses both of those issues: using an efficient heating system and maintaining a constant supply of fresh warm air to the home. 

The system can also complement homes already using wood stoves for space heating. Researchers are tracking the fuel and power consumption of the system and monitoring indoor CO2 and humidity levels.


This video shows how the system works: 


Related Topics & Keywords: 


Little Ventilation Project Looking at ventilation systems that can improve indoor air quality in small homes while limiting energy use.
Bath Fan Installation Best Practices Create standards for installing bath fans based on an evaluation of five Panasonic WhisperGreen units.
Garage Wall Analysis CCHRC is looking at attached garages to see if they adequately prevent pollutants from entering the house.
BrHEAThe with Air Source Heat Pump CCHRC is testing how an air source heat pump can be integrated into a heating and ventilation system in high efficiency homes.
BrHEAThe Evaluation In an effort to address these issues CCHRC developed the BrHEAThe system in 2011. BrHEAThe is a combined heating and ventilation system which uses one distribution system to provide fresh air and space heating to high-performance homes in cold climates.