what are the voltages present is a barometric draft furnace
120v, 24v, 30mv
what are the voltages present in a DSI furnace
120v, 24, H.V.
what are the voltages present in a HSI furnace
what is not the most accurate but the easiest method to determine air quantity through the furnace
gas valve operators with delayed action will be
bimetal in operation
the odorant that is added to natural gas is
the pilot flame should envelop a heat sensitive device by
3/8 to 1/2 inch
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