Q: I have an older oil-fired furnace that works very well and is dependable. The only complaint I have is that after the blower goes off it will come back on for a brief period after several minutes.

Bob is a service technician who is well trained and nationally certified. However, he has sometimes suffered from the same confusion that all technicians occasionally do — the facts that he gathers ...

Forced-air heat is generated at a central furnace and is then distributed and delivered to the conditioned space via a duct system. A properly designed heating system will generate quiet, filtered, ...