When you use standard ventilation methods of trickle vents on the windows and extractor fans in your kitchen and bathrooms you actively draw outside air into the house regardless of the temperature outside. Your heating now has to heat up this air that you have coming in through the vents!
MVHR systems use the heat from your extracted air to warm up the incoming fresh, filtered air before it reaches you rooms and it does this continuously providing a fresh and comfortable environment.
MVHR systems use the heat from your extracted air to warm up the incoming fresh, filtered air before it reaches you rooms and it does this continuously providing a fresh and comfortable environment.