Ok, so the thing is blowing out Sub-Zero exhaust pipe air at room temperature supply air? Awesome! Good to know the rig puts out nice warm air. More useful heat and less power draw than a hair dryer heater is good news.
What I ended up doing with mine to keep the exhaust pipe air colder than outdoor temperature was to choke the evaporator supply air. I just put a filtrete air filter over the inlet grille. That little bit of restriction gave me about 5 degF outlet air. Like I said before, by the time it got that cold outside, the gas blast furnace was running anyway to keep the house warm.
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