Gas Duct Furnaces

Common in large commercial and industrial spaces with a central blower, gas duct furnaces are versatile, with models for both indoor and outdoor use. With gravity vented, power vented, and separated combustion designs using natural gas or propane, you'll be able to find a gas-fired duct furnace that works for you. Gravity-vented units are available in a variety of sizes, and designed to be used in your building's heating/cooling system with a natural draft. Power vented units may be a better choice for horizontal vent systems or when there's negative pressure around the unit.

Our experienced customer service team is prepared to help you choose the one that's right for your application. Browse our selection of gas duct furnaces, all of which qualify for fast, free shipping in the lower 48 states.

Modine DFG75TFRNN14A1 Indoor Natural Gas Duct Furnace, Gravity Vent, Stainless Exchanger, Burner AND Pan, 75000 BTUH

~~$2,399.00~~ $1,999.00 Sale

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Modine DFG100TFRNN14A1 Indoor Natural Gas Duct Furnace, Gravity Vent, Stainless Exchanger, Burner AND Pan, 100000 BTUH

~~$2,432.00~~ $2,027.00 Sale

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Modine DFG125TFRNN14A1 Indoor Natural Gas Duct Furnace, Gravity Vent, Stainless Exchanger, Burner AND Pan, 125000 BTUH

~~$2,531.00~~ $2,109.00 Sale

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Modine DFG150TFRNN14A1 Indoor Natural Gas Duct Furnace, Gravity Vent, Stainless Exchanger, Burner AND Pan, 150000 BTUH

~~$2,885.00~~ $2,404.00 Sale

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Modine DFG175TFRNN14A1 Indoor Natural Gas Duct Furnace, Gravity Vent, Stainless Exchanger, Burner AND Pan, 175000 BTUH

~~$2,950.00~~ $2,459.00 Sale

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Modine DFG200TFRNN14A1 Indoor Natural Gas Duct Furnace, Gravity Vent, Stainless Exchanger, Burner AND Pan, 200000 BTUH

~~$3,221.00~~ $2,684.00 Sale

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Modine DFG225TFRNN14A1 Indoor Natural Gas Duct Furnace, Gravity Vent, Stainless Exchanger, Burner AND Pan, 225000 BTUH

~~$3,396.00~~ $2,830.00 Sale

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Modine DFG250TFRNN14A1 Indoor Natural Gas Duct Furnace, Gravity Vent, Stainless Exchanger, Burner AND Pan, 250000 BTUH

~~$3,733.00~~ $3,111.00 Sale

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Modine DFG300TFRNN14A1 Indoor Natural Gas Duct Furnace, Gravity Vent, Stainless Exchanger, Burner AND Pan, 300000 BTUH

~~$4,041.00~~ $3,367.00 Sale

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Modine DFG350TFRNN14A1 Indoor Natural Gas Duct Furnace, Gravity Vent, Stainless Exchanger, Burner AND Pan, 350000 BTUH

~~$4,492.00~~ $3,744.00 Sale

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Modine DFG400TFRNN14A1 Indoor Natural Gas Duct Furnace, Gravity Vent, Stainless Exchanger, Burner AND Pan, 400000 BTUH

~~$4,749.00~~ $3,958.00 Sale

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Modine DFP75TFRNN14A1 Indoor Natural Gas Duct Furnace, Power Vent, Stainless Exchanger, Burner AND Pan, 75000 BTUH

~~$2,515.00~~ $2,095.00 Sale

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Modine DFP100TFRNN14A1 Indoor Natural Gas Duct Furnace, Power Vent, Stainless Exchanger, Burner AND Pan, 100000 BTUH

~~$2,563.00~~ $2,136.00 Sale

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Modine DFP125TFRNN14A1 Indoor Natural Gas Duct Furnace, Power Vent, Stainless Exchanger, Burner AND Pan, 125000 BTUH

~~$2,667.00~~ $2,222.00 Sale

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Modine DFP150TFRNN14A1 Indoor Natural Gas Duct Furnace, Power Vent, Stainless Exchanger, Burner AND Pan, 150000 BTUH

~~$2,914.00~~ $2,428.00 Sale

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Modine DFP175TFRNN14A1 Indoor Natural Gas Duct Furnace, Power Vent, Stainless Exchanger, Burner AND Pan, 175000 BTUH

~~$3,039.00~~ $2,532.00 Sale

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Modine DFP200TFRNN14A1 Indoor Natural Gas Duct Furnace, Power Vent, Stainless Exchanger, Burner AND Pan, 200000 BTUH

~~$3,237.00~~ $2,698.00 Sale

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Modine DFP225TFRNN14A1 Indoor Natural Gas Duct Furnace, Power Vent, Stainless Exchanger, Burner AND Pan, 225000 BTUH

~~$3,441.00~~ $2,868.00 Sale

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Modine DFP250TFRNN14A1 Indoor Natural Gas Duct Furnace, Power Vent, Stainless Exchanger, Burner AND Pan, 250000 BTUH

~~$3,753.00~~ $3,128.00 Sale

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Modine DFP300TFRNN14A1 Indoor Natural Gas Duct Furnace, Power Vent, Stainless Exchanger, Burner AND Pan, 300000 BTUH

~~$4,257.00~~ $3,547.00 Sale

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Modine DFP350TFRNN14A1 Indoor Natural Gas Duct Furnace, Power Vent, Stainless Exchanger, Burner AND Pan, 350000 BTUH

~~$4,666.00~~ $3,889.00 Sale

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Modine DFP400TFRNN14A1 Indoor Natural Gas Duct Furnace, Power Vent, Stainless Exchanger, Burner AND Pan, 400000 BTUH

~~$4,899.00~~ $4,083.00 Sale

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Modine DFS75S Indoor Gas Duct Furnace, Sep. Comb., Stainless Exchanger - Aluminized Burner And Pan, 75,000 BTUH

~~$3,114.00~~ $2,595.00 Sale

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Modine DFS75T Indoor Gas Duct Furnace, Sep. Comb., Stainless Exchanger, Burner And Pan, 75,000 BTUH

~~$3,190.00~~ $2,659.00 Sale

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Modine DFS100S Indoor Gas Duct Furnace, Sep. Comb., Stainless Exchanger - Aluminized Burner And Pan, 100,000 BTUH

~~$3,186.00~~ $2,655.00 Sale

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Modine DFS100T Indoor Gas Duct Furnace, Sep. Comb., Stainless Exchanger, Burner And Pan, 100,000 BTUH

~~$3,243.00~~ $2,703.00 Sale

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Modine DFS125S Indoor Gas Duct Furnace, Sep. Comb., Stainless Exchanger - Aluminized Burner And Pan, 125,000 BTUH

~~$3,502.00~~ $2,918.00 Sale

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Modine DFS125T Indoor Gas Duct Furnace, Sep. Comb., Stainless Exchanger, Burner And Pan, 125,000 BTUH

~~$3,559.00~~ $2,966.00 Sale

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Modine DFS150S Indoor Gas Duct Furnace, Sep. Comb., Stainless Exchanger - Aluminized Burner And Pan, 150,000 BTUH

~~$3,808.00~~ $3,174.00 Sale

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Modine DFS150T Indoor Gas Duct Furnace, Sep. Comb., Stainless Exchanger, Burner And Pan, 150,000 BTUH

~~$3,873.00~~ $3,227.00 Sale

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Modine DFS175S Indoor Gas Duct Furnace, Sep. Comb., Stainless Exchanger - Aluminized Burner And Pan, 175,000 BTUH

~~$3,912.00~~ $3,260.00 Sale

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Modine DFS175T Indoor Gas Duct Furnace, Sep. Comb., Stainless Exchanger, Burner And Pan, 175,000 BTUH

~~$3,977.00~~ $3,314.00 Sale

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Modine DFS200S Indoor Gas Duct Furnace, Sep. Comb., Stainless Exchanger - Aluminized Burner And Pan, 200,000 BTUH

~~$4,240.00~~ $3,533.00 Sale

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Modine DFS200T Indoor Gas Duct Furnace, Sep. Comb., Stainless Exchanger, Burner And Pan, 200,000 BTUH

~~$4,315.00~~ $3,596.00 Sale

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Modine DFS225S Indoor Gas Duct Furnace, Sep. Comb., Stainless Exchanger - Aluminized Burner And Pan, 225,000 BTUH

~~$4,381.00~~ $3,651.00 Sale

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Modine DFS225T Indoor Gas Duct Furnace, Sep. Comb., Stainless Exchanger, Burner And Pan, 225,000 BTUH

~~$4,455.00~~ $3,713.00 Sale

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About Our Gas Fired Duct Furnaces

We want to ensure you get your order right the first time, so we list every product with great detail. Low factory-direct pricing on new (never refurbished or factory second) items is just the beginning. You'll see product manuals, installation guides, and warranties along with availability and lead time.

Because gas duct furnaces require qualified installers, you'll be asked to confirm that you are a qualified installer or that you will hire one. You'll also see some required selections, such as fuel type, gas control, voltage, and access side, along with optional selections for conversion kits and other accessories. If anything about your order seems incorrect, we'll contact you before we fulfill it to ensure there were no mistakes when you placed the order. It's another way we make sure you get exactly what you want.

H-Mac Systems is here to meet all your heating, cooling, and ventilation needs. Contact us for more information about gas duct furnaces and other HVAC solutions.

Gas Duct Furnaces

Products [198]

About Our Gas Fired Duct Furnaces