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Red Green would be proud.I especially like the duct tape elbow ...
They should have run the duct through it to help it warm up and also catch the lint? I think that is in the IECC....Heat recovery...Do you have any issues with the water heater ?
One and two family dwellings would apply to the entire structure, a single family house or twin home, or a townhouse constructed to meet IRC requirements. An apartment building is a multi family structure. Dwelling has a different definition than Dwelling Unit: