All installations and services must be performed by qualified service personnel.
Model NO. |
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Heat input rate (BTUH) | 50,000 |
| 75,000 |
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| 100,000 |
| 125,000 | ||||||||
Heating capacity (BTUH)1 | 40,000 |
| 60,000 |
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| 81,000 |
| 101,000 | ||||||||
Nominal temp. rise |
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| 70° | F. |
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Heating fan speed |
| LOW |
| MD LOW |
| LOW |
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| MD LOW | |||||||
Burner orifice size for nat. gas |
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| 0.0935” | (#42) |
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Burner orifice size for L.P. gas |
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| 0.0591” (1.5 mm) |
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AFUE % |
| 81.0 |
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| 80.0 |
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| 81.0 |
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| 81.0 |
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Height of casing |
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Width of casing |
| 17” |
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| 17” |
| 17” |
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| 17” |
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Depth of casing |
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| 27 | ½” |
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Warm air outlet2 | 15” x 18” |
| 15” x 18” |
| 19” x 18” | 22” x 18” | ||||||||||
Return air inlet2 | 15” x 18” |
| 15” x 18” |
| 19” x 18” | 22” x 18” | ||||||||||
Approx. shipping weight | 131 LBS |
| 143 LBS |
| 170 LBS | 186 LBS | ||||||||||
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Dia. of flue (vertical vent) |
| 3” |
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| 4” |
| 4” |
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| 4” |
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Dia. of flue (sidewall vent)3 |
| 3” |
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| 4” |
| 4” |
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| 4” |
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CFM @ .2” & .5” W.C. external | .2” |
| .5” |
| .2” |
| .5” |
| .2” | .5” | .2’ | .5” | ||||
static pressure |
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@HI speed | 900 |
| 730 |
| 1400 |
| 1220 |
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| 1595 |
| 1370 |
| 2075 |
| 1790 |
@MH speed | 835 |
| 680 |
| 1200 |
| 1075 |
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| 1460 |
| 1260 |
| 1830 |
| 1605 |
@ML speed | - | - |
| 926 | 850 |
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| 1360 |
| 1170 |
| 1620 |
| 1430 | ||
@LO speed | 580 | 425 |
| 765 | 700 |
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| 1220 |
| 1075 |
| 1345 |
| 1265 | ||
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Blower motor type & frame |
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| Permanent split capacitor, air over, 48 Y |
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Blower motor nominal HP |
| 1/5 |
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| 1/3 |
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| 1/2 |
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| 3/4 |
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Blower motor full load amps |
| 3.25 |
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| 6.0 |
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| 8.0 |
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| 11.0 |
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Motor shaft diameter |
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| ½” |
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Direction of rotation (shaft end) |
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| Clockwise |
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No. of speeds |
| 3 |
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| 4 |
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| 4 |
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Run capacitor | 10 mfd |
| 10 mfd |
| 10 mfd | 15 mfd | ||||||||||
| 370 VAC |
| 370 VAC |
| 370 VAC | 440 VAC | ||||||||||
Blower size |
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Size of filters | (2) |
| (2) |
| (2) – 1” x 17 ¾” x | (2) – 1” x 17 ¾” | ||||||||||
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| 11 ¾” |
| 11 ¾” |
| 13 ¾” | x 17 ¾” | |||||||||
Largest recommended air |
| 2 Ton |
| 3 Ton |
| 3.5 Ton | 4 Ton | |||||||||
conditioner4 |
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Electrical power requirements |
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| 115 volts, 60 Hz., 1 phase |
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Min. Fuse size | 15 AMP |
| 15 AMP |
| 15 AMP | 20 AMP | ||||||||||
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| ACCESSORY ITEMS |
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Combustible Floor Base |
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Horizontal Plenum Angles |
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| AOPS4942 |
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Vent Kit (top vent option) |
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| AOPS4941 |
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NOTES: |
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1.BTU output based on annual fuel utilization efficiency rated by manufacturer.
2.On all outlet and inlet dimensions, the first dimension is width.
3.The MHA1/MDA1 furnaces are approved for sidewall venting using only an approved sidewall power venter. Refer to Side Wall Venting section of the Installation and service manual provided with the furnace for additional information.
4.To permit largest recommended air conditioning (at .5 static pressure), selection of the highest motor speed is required.
5.All specifications are subject to change without notice.
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