I had an energy audit done by Clearesult Canada after a different contractor failed to show. The Clearesult assessor, Tom, was polite, cheerful, and highly knowledgeable. During a 3 hr assessment, he pointed out areas of air leakage that required caulking, foam, insulation etc. and explained which energy-saving improvements would be the most cost-effective for my home (spoiler alert: a heat pump to replace my aging furnace). From the blower test, I learned that my old wooden windows aren't as bad as I thought, and though I could replace them, caulking around the frames will make them much more airtight, saving me thousands of dollars. Clearesult's service more than paid for itself.