bevm45
Dec 17, 2009, 01:55 PM
Trying to figure out correct BTU size for purchasing new furnace. Total living space of my 15 year old ranch home (including finished basement) is 2800 square feet. I currently have York Stellar 100,000 BTU single stage 92% efficiency furnace. Heating contractor wants to replace with Lennox G61 36B071 two stage 70,000 BTU 95% efficiency furnace. I am questioning reduction in BTU. Contractor is adamant 70,000 BTU is adequate. 70,000 or 100,000 BTU? Which is adequate? Thank you.