Insulating blanket for a water heater

Liquid-backed gas-fired heating system

Low NO.sub.x water heater with finned burner

Method and apparatus for foam insulating a vessel

Method and apparatus for saving energy in direct fired boilers

Modular water heater connection apparatus and method for fabrica

Multi-controlled water conservation system for hot water lines w

Oil and gas water heater

Oil and gas water heater

Parallel fluid heating system

Parallel piped fluid heaters with staged flow controlled by magn

Pressure balancing water heater dip tube turbulator attachment

Pulsing combustion

Pump for secondary circulation

Recirculating system with by-pass valve

Secondary circulation system

Sediment agitating apparatus for water heater

Sediment agitating apparatus for water heater

Self clamping temporary foam dam for protecting water heater ele

Storage water heater system