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View Full Version : Older day n night model numbers


biggabe
Dec 14, 2009, 10:01 AM
Have an older day n night gas/ elec roof pack about 18 years old, single phase, 4-ton, need the model number.

hvac1000
Dec 14, 2009, 11:48 AM
The model number is located on a permanent tag on the unit. There could have been more than 150 different models made of that unit over the years.

greylilac
Oct 8, 2012, 11:15 AM
Bought a house, Furnace runs fine. Went to change the filter and there isn't one I can see. Day & Night furnace. Where should the filter be?