Existing Lennox twin 137,000 Btu furnaces heat our house adequately using one furnace per season, and alternating years. Good energy conservation practice. They will be replaced with twin G40UH 48B-090 at 71,000 output each. Do you recommend a 2-stage TS if our house needs more than 71,000 Btus, i.e., both furnaces?

Asked by Frank on 01/11/2010 1  Answer

ManualsOnline posted an answer 14 years, 10 months ago

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