replace furnace & A/C units
I have had two quotes on replacing my furnace & central A/C unit. My home has one floor & 1100 sq ft. One company will install a gas Trane furnace w/90% upflow & 3.5 ton 80,000btus and a 1.5 ton 13 seer trane AC. They want to wrap my vent that's exposed to cold but don't think I need a new small chimney line vent for the gas hot water heater. the other company doesn't think I need to wrap the exposed vent but says I need a new chimney vent line. They will install a 93% lennox high efficiency 70,000btu gas furnace and 15.5 seer Lennox AC. Both are about $6500 total. Do i really need to wrap the exposed vent and a new liner in the chimney? Is lennox that much better than Trane? What difference do the # of BTU's make?Help!