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820TA - Preferred - 2 Stage - 80% - Variable Speed ECM
Quiet performance and even-temperature comfort from variable-speed air delivery
Two-stage operation allows longer, more even heating cycles on low stage
Perfect Heat® technology means consistent comfort by adjusting system operation to changing conditions
Fan On Plus™ technology lets you choose the speed of continuous fan operation with a compatible control
Insulated cabinet for quieter operation
Low NOx models available (821TA)
20-year limited warranty on heat exchanger3
10-year parts limited warranty upon registration upon timely registration2
820TA - Preferred - 2 Stage - 80% - Variable Speed ECM
Quiet performance and even-temperature comfort from variable-speed air delivery
Two-stage operation allows longer, more even heating cycles on low stage
Perfect Heat® technology means consistent comfort by adjusting system operation to changing conditions
Fan On Plus™ technology lets you choose the speed of continuous fan operation with a compatible control
Insulated cabinet for quieter operation
Low NOx models available (821TA)
20-year limited warranty on heat exchanger3
10-year parts limited warranty upon registration upon timely registration2