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GIBSON O4 Furnace

4.0 of 5 stars 1 review | #2 of 3 Furnaces
Updated: Jun 27, 2013 | Read more about GIBSON Furnaces | O4 Warranty

Overview of O4

The Gibson O4 furnace, manufactured by Nordyne, is an oil-burning furnace with an AFUE rating of up to 84 percent. This multi-firing series offers output values in the range of 0.5 to 1.2 gallons per hour. The high boy and downflow models in this line can installed in horizontal applications. The lowboy is available with a front or rear flue while the compact model is designed with a rear flue only.

The Gibson O4 furnace is manufactured with a 22-gauge steel cabinet made more durable by a powder coat finish. Its Beckett burner is pre-wired, pre-assembled, tested in the factory and ready for a supply-line upon installation. A wraparound-style radiator allows for maximum heat transfer and is insulated with spun glass and aluminum foil to keep the unit cool to the touch. The direct-drive blower is permanently lubricated, and the 4-speed blower motor is thermally protected. All models of the Gibson O4 furnace come with barometric draft control.

The welded heat exchanger has large clean-out ports, and the burner and controls can be accessed easily via the removable door. The entire blower assembly and motor can be removed for maintenance as well.

Consumer Reviews of the O4

4.0 4.0 of 5 stars 1 review
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4 of 5 stars jmzxKovBmYJyeAoLWen
Date created: 2013-03-28


How long did you have the heater on? It needs to be rnnniug for a few minutes before the blower will come on.There is a thermal switch that turns on the blower. It could be bad, or the blower motor could be bad. On your thermostat is there a switch for the fan that says auto and on ? If so, turn the switch to on, and see if the blower comes on. If so, the thermal switch is probably bad.

Other O4 Reviews

While there are few posts about the O4 series specifically, largely positive reviews regarding the Gibson furnaces can be found in online forums. It has been said that their “performance is similar enough [to more well-known brands] that you need to focus on the actual installation and system design.” Also, “very few problems” are reported and, according to at least one professional HVAC technician on, “You get a lot of bang for your buck with Nordyne products.”

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GIBSON O4 Model Numbers

The O4 is available in different models which vary in efficiency and capacity.

Model Number AFUE BTUs per Hour
04HD-091A-12-F 80.5 98,000
04HD-140A-16-F 80 140,000
04HD-140A-16-FA 80 140,000

O4 Warranty

All oil furnaces must be professionally set-up and installed at which point a 5-year warranty on all parts of the Gibson O4 applies. There is a limited lifetime warranty on the heat exchanger.

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