Topics: Tracing a ceiling leak in a cathedral ceiling with a Maxi ridge vent; A bird blocked chimney in an oil burning fireplace; Condensing furnace exhaust coming into a window; Why is only one hot water radiator not working; Improving a natural gas system with hybrid energy – Dual Energy – Tri Energy; Should I change my tank on an oil hot water system; Opened wall and still can’t see where water is coming in.