Common venting of water heater and induced draft furnace
AssigneeGas Research Institute
InventorPeter P. Payne
Life of this patent
Estimating the term…
Abstract
A common, side-wall, Category III or Category IV-vented gaseous fuel-fired furnace and gaseous fuel-fired water heater system having a gaseous fuel-fired furnace having a furnace combustion products exhaust, a gaseous fuel-fired water heater having a water heater combustion products exhaust, and a Category III or Category IV vent in communication with the furnace combustion products exhaust and the water heater combustion products exhaust for venting of the combustion products from the furnace and water heater.
Claims19
A common, side wall, vented gaseous fuel-fired appliance and gaseous fuel-fired water heater system comprising:
- a gaseous fuel-fired appliance having an appliance combustion products exhaust;
- a gaseous fuel-fired water heater having a water heater combustion products exhaust;
- a positive pressure vent in communication with said appliance combustion products exhaust and said water heater combustion products exhaust, said positive pressure vent suitable for venting appliance combustion products and water heater combustion products at a vent pressure greater than a surrounding atmosphere pressure;
- and
- a priority selection means for selecting priority of operation of one of said gaseous fuel-fired appliance and said water heater operatively connected to said gaseous fuel-fired appliance and said water heater.
A common, side-wall, vented gaseous fuel-fired furnace and gaseous fuel-fired water heater system comprising:
- a gaseous fuel-fired furnace comprising a combustion chamber, a gaseous fuel input in communication with said combustion chamber, a furnace combustion products exhaust in communication with said combustion chamber, controllable dilution air means for controllably introducing dilution air into said furnace combustion products in said furnace combustion products exhaust, and a flow control orifice disposed downstream of said controllable dilution air means proximate an outlet of said furnace combustion products exhaust;
- a gaseous fuel-fired water heater comprising a water heater combustion chamber having a water heater gaseous fuel input and a water heater combustion products exhaust;
- a positive pressure vent suitable for exhausting a vent gas having a vent gas temperature one of at least 140° F. above its dew point temperature and less than 140° F. above said dew point temperature at a pressure above atmospheric pressure in communication with said furnace combustion products exhaust and said water heater combustion products exhaust;
- and
- priority selection means for selecting priority of operation of one of said furnace and said water heater operatively connected to said furnace and said water heater.
Dependencies are inferred from the claim text.