Hidden design flaws and blockages in your air duct system can cause air flow to be restricted or unevenly distributed. Not only is this a waste of money, it can make your home uncomfortable. In studies conducted for electric utilities nationwide, it was shown that over 66% of heat pumps and air conditioners suffer from this problem. Your consultant will conduct ‘static pressure’ tests – like a blood pressure check for your ducts – to reveal any design problems or hidden blockages .