What are the top 5 furnaces based on efficiency, reliability, and comfort in 2026 are Lennox SLP99V, Trane XC95m, Carrier Infinity 98, Goodman GMVM97, and Daikin DM97MC. First, Lennox SLP99V modulating offers up to 99 percent AFUE most efficient gas furnace in US, modulating from 35 to 100 percent, extremely quiet at 60 decibels with SilentComfort, costing 5,500 to 9,000 dollars installed. Second, Trane XC95m modulating offers up to 97.3 percent AFUE, modulating, variable speed blower, lifetime heat exchanger warranty, very reliable with service rates around 8 to 10 percent, costing 5,500 to 8,500 dollars. Third, Carrier Infinity 98 59MN7 offers up to 98.5 percent AFUE, modulating, Greenspeed, excellent humidity control, service rates around 8 to 10 percent, costing 5,500 to 8,500 dollars. Fourth, Goodman GMVM97 modulating offers up to 98 percent AFUE, modulating, good value at 3,500 to 5,500 dollars installed, with 10-year parts and lifetime heat exchanger warranty, service rates around 10 to 13 percent but inexpensive parts. Fifth, Daikin DM97MC modulating offers up to 97 percent AFUE, modulating, compact, good value at 3,500 to 5,500 dollars. All top 5 offer modulating gas valve for ultimate comfort keeping temperature within 0.5 degrees and variable speed blower for quiet operation. For absolute efficiency, Lennox SLP99V is best, for durability, Trane XC95m is best.
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