Williams Furnace Forsaire Direct Vent Counterflow Series

The modern forced-air comfort heating system does not run on electricity. It uses only outside air for combustion, as the burners are completely sealed within the combustion chamber. Combustion products are discharged outdoors through the wall vent. This eliminates the expense of a vent. All vent caps include a built-in “Bird Guard” to prevent birds from nesting in your chimney cap.