MRCOOL 3.5 Ton 14 SEER Split System Air Handler, - MAHM042CTA
The MRCOOL Multi-Position Air Handler is designed to deliver dependable comfort, and is built for reliability. The permanent split capacitor (PSC) motor delivers consistent airflow throughout the seasons, allowing you to remain relaxed at all times. When choosing a MRCOOL Multi-Position Air Handler, you can always know that you are being energy and time efficient.
Features
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Smaller profile for closet applications
- Optional auxiliary heat kits are available
- Baked polyester paint finished over galvanized steel for maximum durability
- Antimicrobial treated drain pan to resist mold and mildew growth
- Factory tested for leakproof construction
- Foil faced insulation for enhanced indoor air quality
- CoolGuard total corrosion protection technology designed coil
- Built-in indoor time delay for increased efficiency and comfort
- One piece design
- High-strength/heat resistant/corrosion resistance SMC drain pans
- Multi-position = Upflow/Horizontal Left/Right
Specifications
| Product Dimensions |
21.25"W x
19.5"D x
53.63"H |
| Product Weight |
168 lbs |
| SEER |
Up to 14.5 |
| CFM |
1,400 |
| Tonnage |
3 1/2 |
| Cooling Capacity |
42,000 |
| Voltage |
Requires a minimum of 208V-230V/60HZ/5-15A (please check your home meets this electrical requirement prior to purchase) |
| Phase |
1 |
| Cycle |
60 |
| Max Fuse Breaker |
15 |
| Min Circuit Ampacity |
5 |
| Color |
Gray |
| Color Family |
Gray |
| Max Coverage Area |
1,750 square feet |
| Refrigerant Type |
R-410A |
| Number of Speeds |
3 |
| Inverter |
No |
| Lineset Included |
No |
| Lineset Length |
15ft, 25ft, 35ft, 50ft |
| Max Lineset Length |
50ft |
| Lineset Fitting Type |
Sweat |
| Liquid Line Size |
3/8 |
| Suction Line Size |
7/8 |
| Blower Motor Type |
PSC |
| Blower Motor HP |
1/2 |
| Blower Motor Speeds |
3 Speed |
| Blower Motor RPM |
1155-1530 |
| Filter Type |
Replacement |
| Filter Size |
18x20 |
| Auxiliary Heater Included |
No |
| Auxiliary Heater Available |
Yes |
| Auxiliary Heater Sizes |
7.5kw, 10kw, 15kw |
| Contains Electronics |
Yes |
| Contains Chemicals |
Yes |
| Contains Aerosol |
Yes |
| Contains Compressed Gas |
Yes |
| Proposition 65 Warning |
Yes |
What our Experts Think
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Strong Cooling Performance – 3.5-ton capacity delivers powerful airflow for larger homes and open floor plans.
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Solid Efficiency – Designed to support up to 14 SEER when paired with the right condenser for balanced comfort and energy use.
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Flexible Installation – Multi-position design (upflow or horizontal) adapts easily to diverse ductwork layouts.
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Durable & Reliable – Corrosion-resistant materials and antimicrobial drain pan improve longevity and indoor air quality.
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Space-Smart Fit – Compact cabinet works well in attics, closets, or mechanical rooms without sacrificing performance.
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Easy Maintenance – Proven PSC blower motor ensures consistent operation and simpler servicing.
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Heating Compatible – Works with optional electric heat kits for added winter comfort flexibility.
Q&A
Q: What size space does this fit?
A: Designed for 3.5-ton HVAC systems, ideal for larger homes or commercial spaces when paired with a compatible outdoor unit.
Q: How efficient is it?
A: Offers up to 14 SEER performance to balance energy savings and comfort.
Q: What systems is it compatible with?
A: Works with MRCOOL split-system air conditioners and heat pumps.
Q: Can it be installed in various orientations?
A: Yes — supports vertical and horizontal installation flexibility.
Q: Is it quiet?
A: Yes — engineered for low-noise operation with an insulated cabinet and efficient blower.
Q: Who should consider this unit?
A: Homeowners, builders, and HVAC pros seeking a reliable, efficient 3.5-ton air handler for residential or light commercial applications.
Maintenance Tips
• Replace or clean air filters every 30–60 days to maintain airflow, efficiency, and indoor air quality.
• Clean the evaporator coil annually to prevent dust buildup and loss of cooling performance.
• Keep the condensate drain and pan clear to avoid water buildup and mold.
• Inspect the blower and electrical connections periodically for dust, wear, or loose parts.
• Schedule a yearly professional HVAC tune-up to check refrigerant, controls, and overall performance.
Damage 
Loss 
Theft 
