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Old 10-13-2009, 02:38 AM   #31
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lennox conservator g11e problem


upon further inspection i found my old furnace to read input 110,000 and bonnet cap 88000 btu.

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Old 10-13-2009, 06:16 AM   #32
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lennox conservator g11e problem


You should still spend the money and see what size you really need.

While a 100,000BTU 90% would only be 2,000 BTUs more output.

It still will need to move more air then your old furnace. And could make your system loud. And cause higher heating bills then you currently have.

Common old gas furnaces had temp rises of 80.
But, going conservatively, and saying your old furnace had a temp rise of 70, it would have moved 1164CFM.
A new 100,000 BTU 90%er at a temp rise of 55(common) will need to move 1515 CFM. A 30% increase.
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Old 10-15-2009, 01:23 AM   #33
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lennox conservator g11e problem


unfortunately due to the inclimate weather we are having i was forced to get a furnace installed that i thought would best suite my my needs and what i could afford. I went with the 100k btu 90+ furnace, heat pump and humidifer. It seems to be working good. There is a couple of small things that the installer has to come back out tomorrow to finish up. For some reason my outside temperature on my thermostat is not working.,.i got a white rodgers thermostat and the outdoor sensor is a honeywell so he thinks that is the problem. And also i had the humidifier hooked up so it will run even if i only have the fan turned on to circulate air and i when i came downstairs earlier, the water was running through but the blower was not on.. I think the humidstat maybe was set too high. I turned it down and it kicked right off.

the one company did a heat calc test. measured my house, my windows, vents, return vents, etc. they are the ones that had the 2 quotes. I went ahead and went with what the company i chose. I hope it will save me some money over the long run.

I really appreciate all of the help you have given me, althoug i may not have done all you suggested, you really helped me understand alot of things about hvac. I will let you know how it works out in the next few weeks. again, thanks for all of your input.
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Old 10-15-2009, 05:24 AM   #34
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lennox conservator g11e problem


Since you went dual fuel. You probably won't notice problems until it gets cold enough that the furnace has to take over.

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