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Direct gas-fired burner assembly

Stoves and furnaces – Hot-air furnaces – Compressed air
Reexamination Certificate

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Direct gas-fired heating and ventilation method and apparatus

Stoves and furnaces – Hot-air furnaces – Compressed air
Patent

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Direct-fired heater

Stoves and furnaces – Hot-air furnaces – Compressed air
Reexamination Certificate

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Dispersed bubble condensation

Stoves and furnaces – Hot-air furnaces – Compressed air
Patent

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Draft inducer blower mounting feature which reduces overall...

Stoves and furnaces – Hot-air furnaces – Compressed air
Reexamination Certificate

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Dual drainage slope recuperative heat exchanger assembly for fue

Stoves and furnaces – Hot-air furnaces – Compressed air
Patent

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Dual-rate fuel flow control system for space heater

Stoves and furnaces – Hot-air furnaces – Compressed air
Patent

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Dual-sided condensate trap for furnace

Stoves and furnaces – Hot-air furnaces – Compressed air
Patent

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Ductless forced-circulation undercounter furnace

Stoves and furnaces – Hot-air furnaces – Compressed air
Patent

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