Pulsing combustion

Pump for secondary circulation

Radiant/jet impingement gas-fired cooking kettle

Rapid heating cookware

Recirculating system with by-pass valve

Reinforced cooking pan and skirt assembly

Residential boiler/furnace with the intermediate water circuit

Rock heater for sauna

Room air recirculating heater with utility compartments and door

Rotatable cooker

Rotating air draft fireplace

Safety apparatus for combustion device

Saucepan, particularly for use by disabled persons

Sauna heater

Sauna stove

Secondary circulation system

Sediment agitating apparatus for water heater

Sediment agitating apparatus for water heater

See through fireplace

Self clamping temporary foam dam for protecting water heater ele