Williams Furnace High Altitude Conversion Kit with all Required Orifices for 5507331 w31.25 24" and 30" sizes

24" and 30" sizes

This unit is in Natural Gas (LP kit sold separately)

allowing for residential installations

4% HHV Tested Efficiency 2 72

Built-in standoff prevents damage to the siding

Williams Furnace High Altitude Conversion Kit with all Required Orifices for 5507331 w31.25 24" and 30" sizesOverview Williams Comfort Products Made In America Since 1916! For over 100 years, Williams has designed and manufactured quality heating, ventilation, and air conditioning products for both the home and business. It all started in 1916, when Jesse Williams began building gas steam radiators in Los Angeles under the banner Williams Radiator Company. Williams commitment to quality was clear from the start, and the companys product line expanded over