What size furnace do I need?

  • BTU usage is the critical factor.
  • Example: If you are using (1) 20″x20″ coil, that is 140,000 BTU + Domestic Hot Water Heat Exchanger that is 80,000 BTU, then you need a 220,000 BTU furnace
  • Don’t under-size yourself. Better to have a little extra than too small.
  • Talk to your dealer, or our factory, and do an estimate on your BTU usage before you order.
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