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Comfort-Aire OLRB95-D4-1A

Lowboy, Rear Flue, 101,000 - 113,500 Input BTU, Oil Furnace

(6 Reviews)


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    • Pro Installation

The compact Patriot 80 series oil furnaces comes in a variety of configurations to fit virtually anywhere, including utility rooms, alcoves, closets, crawl spaces and attics. In addition to upflow, downflow/horizontal, and front flue versions, models come in heat only and heating cooling combinations. Foil-faced fiberglass insulation, a ceramic high temperature combustion chamber, and harmonically balanced blower keep operating noise to a minimum.

 (Note regarding air conditioning: When adding AC, evaporator coil must be placed at least 6" from outlet of conditioned air due to high temps. If you will be adding a Goodman air conditioner or heat pump system to an oil furnace, you must replace the air conditioning evaporator coil's drain pan with a high temperature one, Goodman models HTP-A, B, C or D. Please call Alpine for assistance.)

Please read this Important Safety Notice.

Standard Features

  • Powerful Heat Exchanger:
    Made of heavy gauge steel, the heat exchanger is engineered for efficiency and long life.
  • Durable Cabinet:
    Heavy gauge steel (14 gauge)  is coated with baked enamel finish, making it corrosion-resistant.
  • Quiet Operation:
    Foil-faced fiberglass insulation, a ceramic high temperature combustion chamber and harmonically balanced blower reduce operating noise.
  • High Efficiency Oil Burner:
    Beckett AFG burner with flame retention head, PSC motor, and solid state ignition.
  • Multi-Firing Rate:
    A simple nozzle change adjusts the firing rate; units are shipped with the smallest firing rate capability.
  • Easy Access Clean Out Ports:
    For quick, simple maintenance.


Configuration is the direction the conditioned air will pass through the unit.

Upflow units will have the air come in from the bottom and blow out the top.

Horizontal units will have the air go through the unit left to right, or right to left.

Downflow units will have the air come in from the top of the unit, and blow out the bottom.

Unsure of what configuration your home needs? Call us at 800-865-5931. Monday through Friday, 8:30am to 5:00pm CST

Blower Cooling Capacity

The tonnage of air conditioning that can be moved effectively by the blower. You want to make sure that the blower is appropriately sized for the air conditioner. If it is too small the coil could ice up. If it is too large than the air coming out of the ducts won't be cold enough.

Blower Cooling Capacity
2.5 / 3 / 3.5 / 4 Tons
Maximum Input BTU

The maximum amount of heat that the unit can produce. The amount delivered into the space will be the input minus the efficiency loss also know as the output. For example a 100000 btu furnace at 80% efficiency will give you 80000 out btus of heat. The same size furnace at 95% will give you 95000 btus of heat.

Maximum Input BTU
113500 BTU
Maximum Heating Output BTU

The amount of heat, rated in British Thermal Units (BTUs), that the unit can deliver into the space. Not sure how many BTUs you need? Try our easy Equipment Sizing Estimator.

Maximum Heating Output BTU
95000 BTU
Minimum Input BTU

The amount of heat produced by the unit at the lower stage of heat. Having two stages of heat will allow for more consistent operation and greater comfort in the home.

Minimum Input BTU
101000 BTU
Minimum Output BTU

The amount of heat delivered into the space on the lower stage of heat. This number is the minimum heat input minus the efficiency loss.

Minimum Output BTU
85000 BTU
Nominal CFM

The amount of air that can be moved by the fan, measured in cubic feet per minute (cfm).

Nominal CFM
Efficiency (% AFUE)

The percentage of energy converted into output by the unit. The remaining percentage is lost during the conversion process. The higher the efficiency, the lower the operational cost.

Efficiency (% AFUE)
83.0 %
Maximum Nozzle Size
.75 GPH
Minimum Nozzle Size
.65 GPH
Breaker or Fuse
15 amps
40 Volt Amps
Fuel Type
Filter Size
18 x 19 Inches
Blower Size
10x9 inches
Flue Diameter
6 inches
18 x 21 inches
18 x 16 inches
Shipping Weight
230 lbs
Meets CSA Standards

Canadian Standards Association

Meets CSA Standards
19 1/2 Inches
52 Inches
37 Inches
120 Volts
60 Hz
Voltage Phase
Heat Exchanger Warranty
Parts Warranty
5 Years