Furnace / Green Building & Sustainable Home Renovation Information & Advice

...furnace that will shut the furnace off if the pump fails. There should be a small reservoir you can pour some water into to check that the pump is working.  Check safety switches on modern furnaces Newer and modern furnaces will have safety switches that set the furnace into a lockout mode that will shut down the furna...

...furnace or boiler: Water vapor formed during combustion is condensed and recovers the latent heat of condensation. This is a very efficient combustion system, somewhere in the area of 90% to 97%.  There is also very little loss during the transmission of heat energy. With a conventional gas furnace or boiler: This is a...