i've used a 30 for about 4 years with pretty good success in the bitter upstate ny winters. anything below about 15degrees i had to use the oil furnace to get to about 72. picked up a 3500 furnace from hd on sale, cheap, in the spring. dont have it in the basement , just where the old 30 and some fan rigs were. have only a 90 degree bend blowing into the house out of the blower vent from an old porch(3200 sq ft 200 year old farmhouse) WHAT A DIFFERENCE! right now it's 19 degrees out and the house is 82. this thing will raise the temp 15 degrees in a half an hour with less than full load. know they switched to epa with tubes this year, but if it's anything like the predecessor, buy it. no comparison.. not a whole lot uglier than the 30 with all the fans i had hooked up and it's definitely no noisier, rarely have the fan on high with a variable speed control i hooked up
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