Recent content by 69pace

  1. 6

    Vintage Knipco 75k BTU Project

    With no power the fan blades should spin with no resistance. I would suspect that the angle the fan was stored in once removed while you were tinkering had something to do with it. No oilier cup would mean sealed bearings - then look for a needle sized hole on the collar. Just bringing the...
  2. 6

    BTU required?

    For what it is worth, many nurseries have temporary greenhouses that are nothing more then bent ribs covered with a poly barrier. Within them they use a standard natural gas air exchanger or forced hot air oil burner that uses a poly vent tube that has holes every foot of so to distribute the...
  3. 6

    cheap heat

    I knew a guy who bought a commercial grade heat exchanger from a plumbing supply house at a dent and scratch sale for dirt cheap. He mounted it in his garage rafters with one down vent installed in the center of the garage and used a domestic 40 gallon hot water heater with a loop and a pump to...
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