"I'd like to make 2 quick points.
First, we need to stop talking as if only 'tight' houses might have issues with CO and other by-products of incomplete combustion. We need to remember that 'leaky' houses are not safe…"
"Curious where you found that BPI is looking for CO-AF. I've always been told BPI is looking for CO not air free CO. Would love to know where the clarification is as to which CO reading BPI's action levels are for."
A hammer and a saw used to be the key tools for home contractors. Today, the best-in-breed also use high-tech equipment while performing a professional energy audit or verifying that construction has been done correctly.