What makes a two-stage furnace worth considering? Comfort and efficiency, mostly. Instead of blasting full heat every time the thermostat calls, a two-stage unit runs at lower capacity most of the time. Quieter operation, more even temperatures throughout the house, and lower energy bills. This South Lake Tahoe homeowner upgraded to a Bryant 80% two-stage furnace with WiFi thermostat, and Riley Plumbing & Heating handled the complete installation. New sheet metal adapters, proper gas piping with sediment trap, high-altitude adjustments, plus smoke and CO detectors as required. Learn More about upgrading your heating system before winter arrives.