I am in bay area, ca. Today outside temp in the range of 44-52 with overcast sky , no sun.
My home 3375 sq ft, built 1995 , two storeyed with 1st floor having open plan , cathedral ceiling ( 12-14 feet ) on 50 % of 2000 sq ft 1st floor.
I have two furnace , one for each floor , down furnace is a single stage Carrier 110000 BTU , 1995 vintage. So, I guess it is 80% AFUE.
My Honeywell VisionPro thermostat is set to 64 for entire time , 3 CPH.
I observed my furnace running for 6 min and then switching off for 20 minutes. The cycle keeps repeating throughout the day with minimal variation as outside temp is in 48-52 range.
Is my furnace short cycling ? Also, is my furnace oversized for my home ? As I mentioned, the 2000 sq ft 1st floor has lot of cathedral ceiling and lot of windows/door .
My home 3375 sq ft, built 1995 , two storeyed with 1st floor having open plan , cathedral ceiling ( 12-14 feet ) on 50 % of 2000 sq ft 1st floor.
I have two furnace , one for each floor , down furnace is a single stage Carrier 110000 BTU , 1995 vintage. So, I guess it is 80% AFUE.
My Honeywell VisionPro thermostat is set to 64 for entire time , 3 CPH.
I observed my furnace running for 6 min and then switching off for 20 minutes. The cycle keeps repeating throughout the day with minimal variation as outside temp is in 48-52 range.
Is my furnace short cycling ? Also, is my furnace oversized for my home ? As I mentioned, the 2000 sq ft 1st floor has lot of cathedral ceiling and lot of windows/door .
source https://hvac-talk.com/vbb/showthread.php?2226097-Furnace-on-for-6-min-off-for-20-min-is-it-short-cycling&goto=newpost
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