America's Leading Discount HVAC Supplier Since 2001 ...
and now, NASCAR Racing Sponsor
Ask an Expert
866 862 8922
Hours of Operation 8am - 8pm EST
11am - 8pm EST
- 1.5 ton - best for spaces between 750 - 1000 sq ft depending on your home's insulation and your climate
- SEER2 rating helps consumers compare energy efficiency when choosing a new air conditioner. Higher SEER2 ratings mean significant utility savings. The federal minimum is 14 SEER2 with ratings into the 20 SEER2 range. A 20 SEER2 uses half the energy of a 10 seer much like MPG ratings for vehicles.
- Heat pumps are all electric and good for mild and cold climates.
- If you have an indoor furnace, or air handler, along with an outdoor AC unit, this system will serve as a replacement for both.
MrCool Signature 1.5 Ton Central Heat Pump System with Wall Mount Air Handler – 14.3 SEER2, R454B
- Condenser: MCAESHS4T1821AA
- Air Handler: MCAEAWPEF18D21AA
- Heating Element: Select A Heat Kit Option
AC Size Calculator | Get BTU’s and Tonnage – Free and Easy!
Welcome! START HERE:
Use the sizing calculator below to calculate your required system size.
Follow these easy steps:
- 1.5 ton - best for spaces between 750 - 1000 sq ft depending on your home's insulation and your climate
- SEER2 rating helps consumers compare energy efficiency when choosing a new air conditioner. Higher SEER2 ratings mean significant utility savings. The federal minimum is 14 SEER2 with ratings into the 20 SEER2 range. A 20 SEER2 uses half the energy of a 10 seer much like MPG ratings for vehicles.
- Heat pumps are all electric and good for mild and cold climates.
- If you have an indoor furnace, or air handler, along with an outdoor AC unit, this system will serve as a replacement for both.
As low as $2,927.00
Free Shipping
Over $1500
*Excludes Commercial Products
DELIVERY TIME 3-10 BUSINESS DAYS
EXCLUDING WEEKENDS AND HOLIDAYS
ProfessionalU.S. Support
GUARANTEED LOWEST PRICES
FREE
SHIPPING
OVER $1500
*Excludes Commercial Products
DELIVERY TIME
3 - 10 BUSINESS DAYS
EXCLUDING WEEKENDS AND HOLIDAYS
PROFESSIONAL
U.S. SUPPORT
ADD TO CART FOR
GUARANTEED LOWEST PRICES
0% Interest
Orders $3000+ offered at checkout
No Credit Needed
Bad credit/no credit is OK - offered at checkout
Orders over $3000 get a
7 night luxury resort stay
MrCool Signature 1.5 Ton Central Heat Pump Condenser – 14.3 SEER2, R454B
Model Number
MCAESHS4T1821AA
Dimensions
23.6" W x 23.6" D x 25" H
Documents
MCAESHS4T1821AA Specifications
Warranty
10 Year Parts, Limited Lifetime Compressor
MrCool Signature 1.5 Ton Stud Mount Air Handler – R454B
Model Number
MCAEAWPEF18D21AA
Dimensions
20.5" W x 15" D x 36" H
Documents
MCAEAWPEF18D21AA Specifications
Warranty
10 Year Parts, Limited Lifetime Compressor
Heat Kit Options
AHRI Number
217513225
MRCOOL 1.5 Ton Heat Pump Condenser – 14.3 SEER2 Signature Series All-Season System (R-454B)
Efficient 17,000 BTU Heating & Cooling for Smaller Homes and Additions
The MRCOOL Signature Series 1.5 Ton heat pump condenser delivers dependable year-round comfort with 17,000 BTU of heating and cooling capacity. Designed for smaller homes, apartments, and room additions, this system offers up to 14.3 SEER2 efficiency to help reduce energy costs while maintaining consistent indoor temperatures.
With built-in intelligent defrost control, quiet operation, and environmentally friendly R-454B refrigerant, this heat pump is built for reliable performance in both heating and cooling seasons. Its compact cabinet makes installation simple, even in tighter outdoor spaces.
Features & Benefits
- 1.5 Ton capacity with 17,000 BTU heating and cooling performance
- Up to 14.3 SEER2 and 7.5 HSPF2 efficiency ratings
- All-in-one heating and cooling system for year-round comfort
- Intelligent defrost function improves cold-weather operation
- R-454B refrigerant with low global warming potential
- Quiet operation around 60 dB(A)
- Compact, lightweight cabinet for easy installation
- Steel louver coil guard for durability and protection
- Temperature and pressure sensors for system safety
- 10-year limited parts warranty with lifetime compressor coverage
MRCOOL 1.5 Ton Wall-Mount Air Handler – Stud-Mount Signature Series R-454B Compatible Unit
Compact 18,000 BTU Air Handler Designed to Fit Between Wall Studs
The MRCOOL Signature Series 1.5 Ton wall-mount air handler is specifically engineered for installations where traditional air handlers won’t fit. Designed to mount neatly between standard wall studs, this unit delivers efficient airflow for 18,000 BTU systems while saving valuable space in homes, apartments, and renovations.
With a slim, low-profile cabinet and ECM motor for efficient performance, this stud-mount air handler provides reliable comfort without sacrificing space. Its flexible return air options and compatibility with modern thermostats make it an excellent solution for tight installation environments.
Features & Benefits
- 1.5 Ton capacity designed for 18,000 BTU systems
- Wall-mount (stud-mount) design fits between standard wall studs
- Compact, low-profile cabinet ideal for tight spaces
- Energy-efficient ECM blower motor
- Quiet operation around 53 dB(A)
- Front or bottom return air configuration for flexible airflow design
- R-454B compatible for modern HVAC systems
- Quick filter access for easy maintenance
- Optional electric heat kits available
- 10-year limited parts warranty
MRCOOL Wall-Mount Air Handler Electric Heat Kit – 5kW, 7.5kW & 10kW Auxiliary Heat Options
Space-Saving Supplemental Heating for 1.5–3 Ton Stud-Mount HVAC Systems
The MRCOOL electric heat kit for wall-mount air handlers is designed to provide reliable supplemental heating for Signature Series stud-mount HVAC systems. Available in 5kW, 7.5kW, and 10kW options, these heat kits enhance comfort by delivering additional heat when outdoor temperatures drop and heat pump performance decreases.
Specifically engineered for MRCOOL wall-mounted (stud-mount) air handlers, these units install directly inside the cabinet for a clean, space-saving solution. With built-in safety controls, durable heating elements, and automatic operation through the system thermostat, these heat kits are ideal for homeowners looking to improve cold-weather performance without increasing system footprint.
Features & Benefits
- Available in 5kW, 7.5kW, and 10kW electric heat capacities
- Designed specifically for MRCOOL wall-mount (stud-mount) air handlers
- Compatible with 1.5–3 ton systems (18K–36K BTU)
- Provides supplemental and backup heat for heat pump systems
- Ideal for space-constrained installations and wall-mounted HVAC setups
- Installs directly inside the air handler cabinet for a clean, integrated design
- Built-in circuit breaker for safety and service disconnect
- 208/230V single-phase operation
- Durable electric heating elements for long-term reliability
- Automatic operation through thermostat-controlled heating stages
Who installs the AC unit after I purchase it?
ACDirect does not yet provide installation services directly. However, most of our customers successfully arrange installation through local licensed HVAC contractors. These systems are designed for professional installation and typically include the components your installer will need.
Here’s how it works:
- Hire a licensed HVAC technician in your area
- Use platforms like Angi, Thumbtack, or a local HVAC directory to find reliable professionals
- Confirm your installer is experienced with the system type you’re purchasing
Note:
Please be aware if you choose to install HVAC equipment yourself and don’t possess proper HVAC licensing, you will void the manufacturer’s factory warranty. If you are capable of a factory-compliant installation yourself, you will need a licensed HVAC contractor to sign off on your work, fully confirming factory-compliant workmanship.
Need help? Contact Our Experts
(866)-862-8922
Hours:
Monday - Friday: 8am to 9pm EST
Saturday: 8am to 8pm EST
Sunday: 11am to 8pm EST
