SOFTSOUNDT IIS90 Two-Stage Gas Furnace


Product Overview

SOFTSOUNDT IIS90 Two-Stage Gas Furnace



Direct Hot Surface Ignition System features an advanced silicon nitride igniter for years of reliable starts.


The RPJ® III primary heat exchanger is made of corrosion-resistant weld-free stainless steel. The unique integrated ripple-edged design forces more heat to the outside surface area for higher efficiencies.

Heating On Demand

Two-stage redundant gas valve, two-speed induced draft blower assembly, and variable speed motor operate normally at the lower stage and ramp up as needed.


Enclosed burner, fully insulated cabinet, and solid door design result in quiet operation.

System Monitoring

State-of-the-art electronic controls monitor system operation and allow for advanced diagnostics, a timesaving tool for technicians.

.   Energy-saving high efficiency operation of 92% AFUE.

.   Two-stage operation system reduces temperature and humidity swings in
     the home by heating and cooling more evenly.

.   7 year No Hassle Replacement Warranty* gives you a brand new unit
    should the heat exchanger fail.

.   Lifetime limited warranty* on the primary and secondary heat exchanger.

.   5 year limited warranty* on all functional parts.

.   HELP® (Homeowner's Extended Labor Program) available.



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