Cecil McKenzie
02-02-2008, 09:00 PM
I am planning to retrofit my furnace to use preheated combustion air. I was wondering if anyone who has switched over to electric has usable equipment that they are interested in selling. I'm looking at 150 BTU therm jet and will need gas train things like zero pressure regulators, butterfly valves , a 3/4 " solenoid valve and various other items. Am looking for a good blower suitable for using with a recuperator and this size burner.
One equipment dealer suggested a variable speed blower. Another suggested a one speed blower and the use of butterfly valve to control air which in turn would control gas. Does anyone have experience with both and have positives or negatives about either. The variable speed proponent says it saves electricity the single speed proponent questions the legality of the variable speed system. It does seem like the variable speed system uses fewer valves.
My furnace is 130 lb freestanding crucible. Thanks for your replies.
One equipment dealer suggested a variable speed blower. Another suggested a one speed blower and the use of butterfly valve to control air which in turn would control gas. Does anyone have experience with both and have positives or negatives about either. The variable speed proponent says it saves electricity the single speed proponent questions the legality of the variable speed system. It does seem like the variable speed system uses fewer valves.
My furnace is 130 lb freestanding crucible. Thanks for your replies.