Q: We have a high-efficiency condensing furnace that vents out a side wall. Should I be concerned about the icicles I see built up on the plastic pipe outside the house? -M.C. Kalamazoo.

Q: Even though we have done a good deal of work to increase energy efficiency in our 1960 split ... The house was already equipped with soffit vents and the roofing contractor added eight passive ...

If you see a reddish-black color appearing on your outdoor HVAC vents, according to ... the risk for a house fire. Sidewall venting is used on high-efficiency furnaces, and exhaust should normally ...

This category applies to 90 percent-plus annual fuel utilization efficiency (AFUE) furnaces. Appliances are designed to dispose of flue condensate as well as condensate formed within the secondary ...