How to deal with oversized furnace?
#1
11-16-10, 05:13 PM
How to deal with oversized furnace?
I have a 2000sq/ft split level with good insulation, 80% 75,000 btu input furance and honeywell tstat set to 3CPH. With this configuration I get quite a bit of short cycling, the tstat will call for heat every 20mins of so and only run for 2-3 minutes then turn the burner off. Should I set the CPH down 1 to 2?
#2
11-16-10, 06:03 PM
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Is the stat near a vent? A false reading will throw it off and cause it to shut down soon.
Has it always done this or just started it?
You could try 2 and let it relearn for a day or two.
Has it always done this or just started it?
You could try 2 and let it relearn for a day or two.
#3
11-16-10, 06:39 PM
Originally Posted by Jay11J
Is the stat near a vent? A false reading will throw it off and cause it to shut down soon.
Has it always done this or just started it?
You could try 2 and let it relearn for a day or two.
Has it always done this or just started it?
You could try 2 and let it relearn for a day or two.
#4
11-16-10, 07:21 PM
Banned. Rule And/Or Policy Violation
So? Turn it down to the minimum and see if that makes things more comfortable.
The only time a heating system is "properly sized" is on the coldest day of the year for which it's designed. When it's warmer out, heating systems are a compromise in various ways.
When it gets colder I would suppose you'd want to set the cycles higher, But for the "shoulder" season when you don't need much heat, by all means reduce the cycles and see if that helps. That's what it there for.
The only time a heating system is "properly sized" is on the coldest day of the year for which it's designed. When it's warmer out, heating systems are a compromise in various ways.
When it gets colder I would suppose you'd want to set the cycles higher, But for the "shoulder" season when you don't need much heat, by all means reduce the cycles and see if that helps. That's what it there for.
