Cast metal heat exchanger and method of formation

Cathodically protected water heater

Central heating boiler

Circulation type hot water supply device

Clamping apparatus for use in foaming water heaters

Cold water inlet for reducing accumulation of scale

Cold water inlet tube

Combination burner and flue gas collector for water heaters and

Combined heating and hot water system

Combined liquid foam stop and insulator for a tank assembly

Combustion air inlet diverter plate for a water heater

Combustion boiler

Combustion chamber shield for hot water heaters

Combustion chamber with high temperature protective coating

Combustion method and apparatus for reducing emission concentrat

Combustion system for burning heavy heating oil with low nox

Commercial storage water heater process

Compact gas fired water heater with improved combustion chamber

Condensate trap for condensing gas boiler

Condensation draining system for condensing water heaters