Want to reduce your energy bill by up to 40%? Start with a blower door. The first step in any home efficiency project is finding and fixing any leaks. Why spend money on a super efficient air conditioning system only to blow cold air out the gaps. The first step to fixing a leaky house is having an assessment done and there are specialized companies to assist you. In some parts of the country, power companies offer their customers free or reduced cost assessments, with the goal of building greater efficiency across their system. Joe Thomas of Renewal Systems Solutions came out to run a few diagnostics on my home and educate me about the process. Whole house assessments include multiple tests, the blower door test being one of them. Watch this video to see how the test is done.