It helps you determine what it will cost to heat, and what you should do to seal it up. When Greening Homes did the blower door test on my 100-year-old house before we renovated it, they couldn't even ...

Most heating and cooling contractors have some familiarity with the blower door device - that big fan the weatherization guys and insulators plug into the doorway that sucks air from a home in order ...

When HVAC contractors expand into home performance, they often experience a steep learning curve as they discover the new tools they need to add to their fleet. One tool considered an absolute ...