Practical ventilation for older home

Greetings GBA,I live in a 1966 home in Toronto, Canada.I just had my 28 year old furnace & a/c replaced with an all electric heat pump system and loving the… Greetings GBA,I live in a 1966 home in Toronto, Canada.I just had my 28 year old furnace & a/c replaced with an all electric heat pump system and loving the…Read MoreGreenBuildingAdvisor