MRCOOL Signature 42K BTU, 3.5 Ton, 14.3 SEER2, Split System Heat Pump Condenser (MCAESHS4T4221AA)

MRCOOLSKU: MCAESHS4T4221AA
47 reviews

Price:
Sale price$2,239.27 Regular price$2,899.95SAVE 22%
Low Stock
Estimated delivery: Sep 14th-23rd
Free Curbside Delivery — carrier calls to schedule

Free Curbside Delivery

Included on every order
Ships free by freight carrier. Your order leaves the warehouse tracked, on a palletized freight truck.
The carrier calls ahead. You'll schedule a delivery window that works for you before the truck heads out.
Delivered to the curb. The item is placed at the end of your driveway. Moving it inside is your responsibility, so plan to have help on hand for heavy pieces.
Before you sign: inspect the packaging for damage. Signing the delivery receipt confirms it arrived in good condition.

Description

The MRCOOL® Signature Series 42k Heat Pump Condenser is a powerful, energy-efficient solution designed to keep your home comfortable all year. With performance ratings of 14.3 SEER2 and 11.7 EER2, it delivers reliable heating and cooling while helping reduce overall energy use and utility bills. Whether you’re facing summer heat or winter chill, this system is built to perform.

Pre-charged with R-454B refrigerant, this model supports modern environmental standards with a lower global warming potential than older refrigerants. The pre-charged design also speeds up installation and reduces labor costs, making it a smart choice for contractors and homeowners alike. At its core, a single-speed scroll compressor ensures steady, long-lasting performance. Enhanced with inner-groove copper tubing, the system provides faster, more efficient heat transfer. Built-in temperature and pressure sensors offer real-time system monitoring and protection, while an intelligent defrost function prevents frost buildup for smooth operation in cold conditions.

Operating at just 65 decibels, the unit stays quiet enough for residential use, aided by a sound-dampening top. Durability features include a steel louver coil guard, and a wire fan grille, the best for protecting internal components.

The compact design allows flexible installation, and accessible service ports simplify maintenance. Backed by a 10-year limited parts warranty and a limited lifetime compressor guarantee, the MRCOOL® Signature Series 42k Heat Pump Condenser offers lasting comfort and confidence.

DIMENSIONS & WEIGHT
Net Dimensions (In)
29.14 D x 32.875 H x 29.14 W
Net Weight (Lbs)
202
Gross Depth (In)
30.3
Gross Height (In)
34.8
Gross Width (In)
30.3
Gross Weight (Lbs)
212
GENERAL INFORMATION
Color
Grey
Inverter
No
CAPACITY & PERFORMANCE
SEER2
14.3
EER2
11.7
HSPF2
7.5
Cfm
2950
Tonnage
3.5
Cooling Capacity (Btu)
39000
Heating Capacity (Btu)
39000
Cycle
60
Min Ambient Cool (F)
59
Min Ambient Heat (F)
5
COMPRESSOR & MOTORS
Compressor Motor Type
Scroll
Condenser Fan Motor Type
PSC
Condenser Fan Motor Hp
1/7
NOISE LEVELS
Decibel Rating (Dba)
65
ELECTRICAL REQUIREMENTS
Voltage (V)
208/230
Phase
1
Max Fuse Breaker (A)
45
Min Circuit Ampacity (A)
26
REFRIGERANT & PIPING
Refrigerant Type
R-454B
Refrigerant Volume (Oz)
119.9
Max Lineset Length (Ft)
150
Liquid Line Size
3/8
Suction Line Size
3/4
CONTROLS & CONNECTIVITY
Works With
Signature Series Multi-Position or Stud Mount Air Handlers
SAFETY
UL Listed
Yes
CSA Listed
Yes
ETL Listed
Yes
Energy Star Certified
No
AHRI Certified
Yes
Contains Electronics
Yes
Contains Chemicals
Yes
Contains Compressed Gas
Yes
Proposition 65 Warning
Yes
WARRANTY
Base Warranty
10 Year Parts, Limited Lifetime Compressor Warranty
Base Parts Warranty
10 Year
Base Compressor Warranty
Limited Lifetime
Shipping
  • Free Shipping on all orders.
  • Large Appliances: Ship via Curbside Delivery — the carrier delivers to your property but not inside your home.
  • Small Items: Ship via standard ground delivery (FedEx or similar), such as small appliances, range hoods, sinks, faucets, and accessories.
Full shipping policy
Returns
  • 30-Day Return Policy: Return requests must be submitted within 30 days of your delivery date. We cannot process returns after this period.
  • Return Requirements: Products must be unused, uninstalled, and in their original packaging (including box and pallet) to qualify.
  • Restocking Fee: A restocking fee may apply and varies by brand.
Full returns policy
Authorized MRCOOL Dealer
Full manufacturer warranty on every MRCOOL product we sell.

Customer Reviews

Based on 47 reviews
87%
(41)
11%
(5)
2%
(1)
0%
(0)
0%
(0)
J
Jim M. (Los Angeles, CA)
Easy to install and working great.

I needed to replace another unit that a previous contractor didn't do any part of that installation correctly, and the condensation line was leaking inside the house, running down the wall since that installation!! The indoor coil was 1-1/2" out of level, the line set wasn't wrapped, the electrical was tapped into the same circuit as the garage light and outlets...it was a mess.

It took me more time to demo the old unit out than to install the one I bought from you.

Thank you.

B
Bill (Philadelphia, PA)
Very pleased.

Very pleased with the price, delivery, ease of installation, and above all during this heatwave it is working excellently.

N
Natalie N. (San Jose, CA)
Perfect for our needs!

I ordered a 2 zone unit for the bedrooms in our home. It took a few months to arrive (manufacturer issue, nothing to do with HOD, and we were contacted on more than one occasion with an order update which was much appreciated!), but when it did arrive was very easy to install. Both the heat and AC function work perfectly, and our family is very happy!

R
Robert W. (Marietta, GA)
Decent Company

I ordered a HVAC system and it arrived in a timely manner and with no apparent issues. I thought the system was defective once installed but it was the installers fault who wired it wrong. My only issue would be the fee (30% I believe) to return a defective item within the 30 day return policy. If it is defective the customer shouldn't have to pay a fee to return an item that is not operating as designed. Other than that this is a good company.

P
Peter K. (Phoenix, AZ)
Pretty Easy Install and Works Great!

Installed my own central HP system. It was a bit of work but nothing beyond a person with basic mechanical and electrical skills. It took me a while because I had to remove the existing electric forced air furnace from a pretty tight place. Some custom sheet metal work and a bit of custom electrical too. Worked perfectly when powered up and I actually like the thermostat provided, although I wish it was clearer how to set up a temperature set-back schedule. Pre-charged refrigerant piping was something new and I liked that too. The best thing is that my electric utility forked out $4,000 and that paid for the unit!

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