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02-06-2005, 10:44 PM #14Regular Guest
Originally posted by wendel
- Join Date
- Dec 2004
A friend has decided, due to warming temperatures, to reduct the gas flow to 80% of normal by partially closing the main shutoff valve. He has a natural draft furnace and says the flame is about 3/4 the height when the main gas valve is fully opened. The furnace now works perfectly with the gas flow reduction, other than a longer cycle time, which was his goal.
What dangers has he overlooked?