Abstract: A heat exchanger comprising a bundle of flexible tubes extended longitudinally and asymmetrically through a flexible tubing of larger diameter to form a tube-in-tube assembly which is wound helically into a coil of desired size, opposing end portions of the coil being provided with suitable fittings for permitting independent connection of the outer tubing to one fluid source and the bundle of flexible tubes to another fluid source.

Abstract: A package heat exchange system using an expanded surface gas-fired burner to supply heat via a heat exchange coil in a dome above the extended surface heat exchanger which heats domestic hot water and supplies heat via the dome to a radiator for heating a living area of a home. A control system provides for utilizing steam from the extended surface heat exchanger to heat the coil in the dome and maintains a first pressure for supplying the domestic hot water and a higher pressure when radiator heat is called for. The heat for domestic hot water may be further heat transferred in a fourth heat exchanger which adjusts the temperature of the domestic hot water. The heat supplied to the radiator may be self-pumping by utilizing steam and the heat to the radiator may be cut off by supplying a control to the return pipe of the radiator which allows the radiator to fill with condensate from the steam.

Abstract: A package heat exchange system using an expanded surface gas-fired burner to supply heat via a heat exchange coil in a dome above the extended surface heat exchanger which heats domestic hot water and supplies heat via the dome to a radiator for heating a living area of a home. A control system provides for utilizing steam from the extended surface heat exchanger to heat the coil in the dome and maintains a first pressure for supplying the domestic hot water and a higher pressure when radiator heat is called for. The heat for domestic hot water may be further heat transferred in a fourth heat exchanger which adjusts the temperature of the domestic hot water. The heat supplied to the radiator may be self-pumping by utilizing steam and the heat to the radiator may be cut off by supplying a control to the return pipe of the radiator which allows the radiator to fill with condensate from the steam.

Abstract: A package heat exchange system using an expanded surface gas-fired burner to supply heat via a heat exchange coil in a dome above the extended surface heat exchanger which heats domestic hot water and supplies heat via the dome to a radiator for heating a living area of a home. A control system provides for utilizing steam from the extended surface heat exchanger to heat the coil in the dome and maintains a first pressure for supplying the domestic hot water and a higher pressure when radiator heat is called for. The heat for domestic hot water may be further heat transferred in a fourth heat exchanger which adjusts the temperature of the domestic hot water. The heat supplied to the radiator may be self-pumping by utilizing steam and the heat to the radiator may be cut off by supplying a control to the return pipe of the radiator which allows the radiator to fill with condensate from the steam.

Abstract: A system utilizing solar energy collectors for heating water, which system embodies a piping circuit whereby water from a storage or supply tank is pumped in a continual upward path through the collectors to a peak elevation and thence through sized return piping so as to return with any entrapped air to the storage area, with the return piping being vented adjacent to the storage area to allow escape of such entrapped air to the storage area, with the return piping being vented adjacent to the storage area to allow escape of such entrapped air while the water is circulating through the system and to allow influx of air to replace water in the collectors when the pump is not operating.

Abstract: A solar energy collector having therein a solar energy-absorbing panel in thermally-conductive relation to fluid conduits through which fluid is urged by an electrically controlled pump, and a thermostat associated with the collector and arranged to detect panel temperature as unaffected by the temperature of the fluid and operable to control activation of the pump in response to variations in temperature of the unaffected panel.

Abstract: A burner control circuit in which the flame of a high capacity burner is ignited by a spark or hot wire and ignition is sensed by a photocell positioned outside the flame and controlling a semiconductor current amplifier which controls the current in a series path through the solenoid of a fuel valve, a thermal time delay relay and a bridge rectifier energized by a transformer winding. The relay opens the series circuit a predetermined time after the transformer has been energized if ignition has not been achieved. The system using the burner is a high capacity heater having the burner positioned inside a plenum of an extended surface heat exchanger for heating a fluid to supply to a second heat exchanger, and energization of the control circuit for the ignition and flame sensing is controlled by the heat required by the first and/or second heat exchangers.

Abstract: A burner for burning a mixture of a combustible gas and air including a curved wall member provided with a multiplicity of ports distributed throughout a substantial area of the wall. The ports are arranged in an ordered pattern such that every port, with the exception of a few along the edges of the burner, is surrounded by a plurality of closely adjacent ports. The size of each port and the distance between adjacent port edges are such that the jets of the gas-air mixture which issue from the ports merge into a common body of such mixture and form a closed lower pressure pocket around each port below such common body. The outer edges of such pocket are located above the minimum ignition level of each port and below the normal outer flame reach distance of the burner for the gas-air mixture supplied to the burner. As a result the flame produced by the burner may be stabilized in either of two regimes or in a combination of both depending upon the rate at which the mixture is supplied to the burner.