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7575001 |
Solar and heat pump powered electric forced hot air hydronic furnace
A furnace and method using a heat pump for providing domestic hot water and forced hot or cooled air utilizing heat pump achieved efficiency levels in an on-demand and unlimited domestic hot water,...
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7422011 |
Fireplace front panel assembly for reducing temperature
A heating appliance includes an outer enclosure including a transparent front panel, a combustion chamber enclosure, and a variable speed blower. The combustion chamber enclosure is positioned...
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7195010 |
Space heater
Disclosed is a space heater, with an air cleaning function, that monitors combustion at a burner, and prevents the halting of combustion due to the erroneous detection of a combustion abnormality....
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6925999 |
Multistage warm air furnace with single stage thermostat and return air sensor and method of operating same
A multistage furnace for heating residential or commercial spaces is operated by a single stage thermostat and a return air temperature sensor providing sensed temperature information to a...
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6808018 |
Heat circulation apparatus
A heat circulation apparatus includes a housing that has a perimeter wall for defining an interior space. The interior space includes an intake port and an exhaust port. The housing is designed for...
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6695046 |
Variable speed fan motor control for forced air heating/cooling system
A fan motor speed control system for controlling the fan motor speed of an air conditioning system includes a power output circuit including a power triac which is turned on and off by an...
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5873356 |
High efficiency wood pellet stove
A wood pellet stove for efficiently burning wood pellets and especially burning pellets at low burns. The stove is accurately controlled by a control panel with a microprocessor which helps safely...
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5865611 |
Fuel-fired modulating furnace calibration apparatus and methods
A gas-fired air heating furnace has a modulatable supply air blower and a modulatable gas valve operatively connected to the combustion air heat exchanger burner. A calibration sequence of a...
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5793119 |
Thermoelectric power generation using pulse combustion
A thermoelectric generator uses pulse combustion to generate heat used to heat plate elements of a thermopile in order to efficiently generate electricity. Stacked plates forming the thermopile...
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5495829 |
Water heater with thermoelectric module and through-chamber heat sink
A self-powered forced or induced draft water heater is provided including a tank adapted for storing hot water, a sealed combustion chamber, a powered burner, a thermoelectric module, and a...
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5462043 |
Wood burning furnace
A unitary furnace through which air is circulated for heating purposes is disclosed. A blower forces air through a number of heat exchange tubes horizontally positioned within the combustion...
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5427086 |
Forced air furnace having a thermoelectric generator for providing continuous operation during an electric power outage
An uninterruptible gas-fired forced hot air furnace utilizes a thermoelectric generator in the path of the hot combusted gas to a heat exchanger. The combusted gas (combustion products) flows...
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4962749 |
Method of operating a natural gas furnace with propane
In a gas furnace designed for operation with natural gas, the use of propane as a fuel is facilitated by increasing the inducer speed by a factor which is obtained by comparing the higher inducer...
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4942863 |
Thermoelectric generator for use in a heater and method of installation
A thermoelectric generating assembly for replacement of a heat exchanger mounted in a fuel-burning heater having electricity-consuming components includes a thermoelectric generator for supplying...
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4928667 |
Gas fire heating unit
A gas fire space heater which can be an insert for an existing fireplace or a free standing unit is described. The device consists of a gas burner with radiants disposed within a housing. The...
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4777928 |
Efficient, pollution free, woodburning furnace
A self-contained, free standing, on-demand, woodburning furnace including a firebox (52), including means to force combustion gases through a manifold (68), a hot air gathering plenum and means to...
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4688547 |
Method for providing variable output gas-fired furnace with a constant temperature rise and efficiency
A furnace is operated such that the air-fuel ratio and the temperature rise are maintained constant so that the efficiency remains constant over the range of operation.
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4632090 |
Stove arrangement
An improved solid fuel burning stove arrangement to heat a selected space including a housing defining a combustion chamber, with an access door thereto for providing fuel to the chamber, a tubular...
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4602610 |
Dual-rate fuel flow control system for space heater
A dual-rate fuel flow control system for the gaseous or liquid fuel supplied to the burner of a space heater, comprising a valve controllable to supply full fuel flow to the burner at the start of...
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4561422 |
Hot air type heater
In a hot air type heating apparatus having two air outlet ports, a temperature of air current blown out of an auxiliary outlet port provided on an outlet port for a high temperature air is rendered...
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4557247 |
Warm-air heating apparatus
A warm-air heating apparatus has a warm-air blowing port 2 for blowing warm air which is warmed in a heat source 4 provided in a casing after having been sucked through an air intake port 3, and a...
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4408716 |
Flue gas heat recovery system
A flue gas heat recovery system for use in conjunction with a forced hot air furnace, such system having two conventional heat exchangers, one located in the flue leading from the combustion...
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4343290 |
Hot air furnace
A hot air furnace has an outer housing and a firebox positioned within the housing. A space between the outer housing and the firebox defines a pre-heating chamber which communicates through an air...
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4320739 |
Combustion type heater
A jacketed wood burning stove of the type having an inner firebox door and an outer jacket door in front of the firebox door and wherein a flash inhibitor is provided consisting of a relatively...
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4232651 |
Wood burning furnace
A wood burning furnace includes a combustion enclosure made up of a lower closed generally rectilinear fire box which is defined at an upper portion thereof by a semicylindrical roof dome and a top...
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4202318 |
Heating apparatus
The multipurpose heating apparatus comprises a hollow and closed elongated metal casing forming a combustion chamber which is fixedly mounted within a closed insulated elongated housing, with the...
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4201187 |
Modular solid fuel furnace system
A solid fuel burning system which may be readily combined with a conventional fluid fuel burning furnace in a forced air heating system. The solid fuel burning system comprises, in combination, a...
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4163441 |
System for reclaiming heat in a furnace arrangement
The present device provides an air duct means disposed between the top end of the heat exchanger of a furnace and the entry port into the flue pipe of the furnace. An electrical blower means is...
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3822690 |
SPACE HEATER PARTICULARLY FOR MOTOR VEHICLES
A space heater particularly for motor vehicles comprises an inner tubular enclosure for a heat source, a first jacket defining a first annular space surrounding the tubular enclosure and traversed...
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3759244 |
VEHICLE HEATER
A self-contained automatic heater unit for a vehicle such as a truck trailer or the like in which a temperature sensor automatically ignites a pre-heater by means including a rechargeable power...
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3620205 |
HEATING APPARATUS FOR CARAVANS AND THE LIKE
A portable heater particularly for caravans forming a thermogenerator comprises a casing containing a substantially flat plate thermoelectric element heated by an inverted gas burner tube, the air...
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3460524 |
THERMIONIC POWER AND HEAT SOURCE
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3353529 |
Stationary hot air building heating system using a gas turbine driven fan
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3227152 |
Portable forced air heater
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3185201 |
Combustion device with thermoelectrically powered burner
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3150657 |
Heating furnace
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3150656 |
Heater
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3057340 |
Thermoelectrically powered heating system
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2975783 |
Gas turbine heater
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2892322 |
Air cycle air conditioning system
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2853995 |
Resonant intermittent combustion heaters and system
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2847952 |
Drives for forced draft fans in steam plants
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2839046 |
Heating and ventilating apparatus
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