Williams Furnace 8A146 High Altitude Conversion Kit for 3003821 btu41000 Covers the gap between the

Covers the gap between the fireplace insert and the fireplace edges

plus three ten minute chimney fire tests at 2100°F

MCK-04-NAT   Firetables

SMARTFUELTM features an exclusive patent-pending Safety PourTM technology

Williams Furnace 8A146 High Altitude Conversion Kit for 3003821 btu41000 Covers the gap between theOverview 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