Comfort Ventilation with Highly Efficient Heat Recovery

Due to the home ventilation system , Passive Houses are effortlessly clean, pollen-free, dust-free, and eliminates moisture and odors in places where they most occur.  Normally, for you to achieve all of what is listed above, you would need to opened up your windows. By opening up the windows, it would result in heat losses which is “greater than the total energy demand.” 

Thus, heat recovery from PHs are very essential for that exact reason.  According to Active for more comfort: The Passive House, “heat recovery reduces ventilation heat losses considerably because inside the heat exchanger, heat from the warm exhaust air is passed on to the cold fresh air.”  As a result, you’d get great temperature control, because often, it would bring incoming air almost up to room temperature with little energy used. However, note that both the air ducts and supply air ducts in the heat exchanger are leak-proof. Fresh air and exhaust air are never assorted. 


The Heat Recovery Process: How It Works In Winter Months

90 percent of heat from the outgoing exhaust air is transferred to the cool fresh air as it enters home, basically,once the heat is transferred on, it warms the incoming air to almost room temperature. The heat exchanger does not mix the fresh air and exhaust air: all that is transferred is the heat. The heat exchanger also include a filter which eliminates pollutants, pollens and other allergens.
The remaining heat required would be supplied by the sun, body occupants, and household appliances.


The Heat Recovery Process: How It Works In Summer Months

In summer months, the process is reversed: the warm outside air is transferred to the exhaust air and lets in only cooler fresh air inside the home. This prevents the warm air from entering the house, therefore, the interior stays cool.