Williams 14,000 BTU Direct Vent Gas Wall Heaters on Sale - ACF Greenhouses 1403822 & 1403821
Williams 1403821 (Item No. 633638) 14,000 BTU, 76% AFUE, Direct-Vent Wall Furnace, Top Air Outlet, LP, No Electricity Required
Williams Furnace AC3040T Top Vent Gas Wall Heater (Natural Gas Only) – US Fireplace Store
Williams Direct-Vent - 30,000 BTU - Gas Direct-Vent Wall Furnace - LP - 66% AFUE - Up To 2,000 Ft Altitude Model: (contact info removed)  for Sale in Los Angeles, CA - OfferUp
Williams High Efficiency Direct-Vent Wall Furnace 177351