
Lennox SLP99 66,000 BTU 99% AFUE Variable-Speed Gas Furnace
In Stock
Description
Lennox's top-tier residential furnace, rated at up to 99% AFUE — among the highest efficiency available in a residential gas furnace. Precise Comfort technology modulates the burner across 65 discrete heat-output levels rather than a handful of fixed stages, holding indoor temperature within roughly half a degree of the thermostat setpoint. The variable-speed blower ramps quietly and pairs with Lennox's iComfort communicating thermostats for whole-system diagnostics and adaptive scheduling. A secondary stainless-steel heat exchanger is standard given the ultra-high-efficiency design. Best suited to colder climates where the added upfront cost is offset fastest by winter fuel savings; a licensed contractor can help confirm the payback period for your climate zone.
Specifications
- Input Capacity
- 66,000 BTU
- AFUE
- 99%
- Stages
- Fully Modulating (65 Levels)
- Blower
- Variable-Speed ECM
- Heat Exchanger
- Stainless Steel (Condensing)
- Control Compatibility
- iComfort (communicating) or standard 24V
- Warranty
- 10-Year Parts (with registration)