Lennox SLP99 66,000 BTU 99% AFUE Variable-Speed Gas Furnace

Model: SLP99UH070XV60CSKU: FUR-LX-SLP99-66K

$3,699$4,199SAVE $500

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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)