Williams Furnace 9A335 High Altitude Conversion Kit for 3509821 and 3509621A h4.63 but with modern flare

but with modern flare

Used to support the biomass chimney as it passes through the firestop spacer or roof support

Clean glass - The clean glass system slows deposit buildup on the glass

7/8" x 20 thread on top

If repair or replacement is not commercially practical

Williams Furnace 9A335 High Altitude Conversion Kit for 3509821 and 3509621A h4.63 but with modern flareOverview 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