The MRCOOL DIY 18K BTU 5th Gen Ductless Mini Split Air Handler is the indoor wall mount unit that heats and cools one room up to 750 square feet.
This wall mount unit offers easy do-it-yourself installation with no special tools or professional services needed. Your order ships with the wall mount air handler and a wireless remote control.
This is the indoor unit only. It works with the matching MRCOOL DIY 5th Gen 18K condenser and pre-charged line set, each sold separately.
Ideal for
- Living rooms
- Large bedrooms
- Home offices
- Garages
Best for: homeowners putting together a new MRCOOL DIY 18K single-zone system or replacing their current 5th Gen indoor unit
Features
- Barely a whisper indoors. Runs as low as 19 dBA, so it will not keep you up at night.
- Control from anywhere. Included remote, SmartHVAC app on your phone, or just ask Alexa or Google Assistant.
- Follow Me comfort. The remote senses the temperature where you're sitting, not at the wall, so the room feels the way you set it.
- Energy saving operation. It ramps up and down instead of cycling on and off, which is what keeps power bills down.
- Washable filter plus Dry, Quiet, Sleep, and Fan Only modes for year-round comfort with no recurring filter cost.
Key Specs
- 18,000 BTU (1.5 ton) heating and cooling
- Covers one room up to 750 sq ft
- 208/230V, 20A max breaker
- 19 to 54.5 dBA sound range
- 42.5" W x 13.2" H x 8.9" D, 35.5 lbs
- Connects to MRCOOL DIY® pre-charged Quick Connect line sets
- Wi-Fi, iOS and Android app, Alexa and Google Assistant
- ENERGY STAR certified, UL and ETL listed
- Model: DIY-18-HP-WMAH-230D25-O
What's Included
-
1 x MRCOOL DIY 18K 5th Gen Wall Mount Air Handler
1 x Wireless Remote Control (with batteries)
What you should know
This is the indoor unit only, not a complete system. To heat and cool your room you also need the matching MRCOOL DIY 5th Gen 18K condenser and a pre-charged line set. If you are replacing an existing 5th Gen 18K indoor unit, this is the right part.
Warranty
- 5-year parts coverage
Specifications:
BRAND NAME |
MRCOOL |
SERIES |
DIY 5th gen Single-Zone Mini-splits |
MODEL |
DIY-18-HP-WMAH-230D25-O |
GTIN |
840255587013 |
UPC |
840255587013 |
SHORT DESCRIPTION |
MRCOOL 18K DIY 5th Generation Mini-Split Air Handler 230V |
TONNAGE |
1.5 |
VOLTAGE (V) |
208/230 |
PHASE |
1 |
CYCLE |
60 |
MAX FUSE BREAKER (A) |
20 |
MIN CIRCUIT AMPACITY (A) |
16 |
MOUNT TYPE |
Wall |
COLOR |
White |
MAX COVERAGE AREA |
750 sq. ft. |
DECIBEL RATING LOW (DBA) |
22 |
DECIBEL RATING HIGH (DBA) |
46 |
NUMBER OF SPEEDS |
5 |
OSCILLATION |
Yes |
LIQUID LINE SIZE |
1/4 in |
SUCTION LINE SIZE |
1/2 in |
FILTER TYPE |
Reusable |
AUXILIARY HEATER INCLUDED |
No |
AUXILIARY HEATER AVAILABLE |
No |
FAN ONLY OPTION |
Yes |
QUIET MODE |
Yes |
AUTO COOL |
Yes |
WIFI COMPATIBILITY |
Yes |
APP COMPATIBILITY |
Yes |
WORKS WITH IOS |
Yes |
WORKS WITH ANDROID |
Yes |
REMOTE CONTROL INCLUDED |
Yes |
UL LISTED |
Yes |
ETL LISTED |
Yes |
ENERGY STAR CERTIFIED |
Yes |
AHRI CERTIFIED |
Yes |
REGISTERED WARRANTY |
Extended Limited Lifetime* |
BASE PARTS WARRANTY |
5 years |
BASE COMPRESSOR WARRANTY |
7 years |
HAS BATTERIES |
Yes |
CONTAINS ELECTRONICS |
Yes |
CONTAINS CHEMICALS |
Yes |
CONTAINS AEROSOL |
Yes |
CONTAINS COMPRESSED GAS |
Yes |
PROPOSITION 65 WARNING |
Yes |
NET DEPTH (IN) |
8.86 |
NET HEIGHT (IN) |
12.8 |
NET WIDTH (IN) |
36.42 |
NET WEIGHT (LBS) |
30.86 |
GROSS DEPTH (IN) |
16.93 |
GROSS HEIGHT (IN) |
15.35 |
GROSS WIDTH (IN) |
40.16 |
GROSS WEIGHT (LBS) |
42.99 |
Need help?
Call us at 1-800-514-2418 and our HVAC product specialists will help answer your questions and customize your MRCOOL DIY 18K BTU 5th Gen Wall Mount Air Handler setup.
Order online in minutes. Secure checkout, free shipping, and no sales tax.
Good AirX is an Authorized MRCOOL Dealer. Every unit ships new, factory-sealed, and fully covered by MRCOOL's manufacturer warranty.
Frequently Asked Questions
Here are some of the most asked questions about MRCOOL DIY 18K BTU 5th Gen Wall Mount Air Handler setup.
What room size is this 18,000 BTU air handler for?
This unit is designed to cool and heat a large room or open space measuring up to 750 square feet. Ideal for living rooms, large bedrooms, home offices or garages.
Is this a complete system or only the indoor unit?
This is the indoor unit only. To have a complete system you also need the matching MRCOOL DIY 5th Gen 18K condenser and a pre-charged Quick Connect line set.
Which condenser does this air handler work with?
It works with the MRCOOL DIY 18K BTU 5th Gen Condenser - 230V. It does not work with 4th Gen or older condensers.
Can I really install this myself? What tools do I need?
Yes, you can install it yourself with basic tools like a drill and a level. The line sets are pre-charged, so there is no vacuum pump and no special HVAC tools. Most homeowners have the wall unit mounted and connected in an afternoon.
Does it heat as well as it cools?
Yes. You get 18,000 BTU of heat, the same as the cooling. It heats down to -13°F and cools up to 122°F.
What warranty do I get if I install it myself?
MRCOOL offers a 5-year parts warranty on the air handler, covering its electrical components, circuit boards, fan motor and coil. The 7-year compressor warranty comes with the condenser.
What is included in the box?
The air handler, a wireless remote control with batteries, the wall mounting plate and marking template, and the manuals.
What is your return policy?
We offer a 30 day returns for completely unused, uninstalled and in their original factory packaging in resalable condition units with restocking fees. Pre-charged line sets are non-returnable. Learn more about our Refund Policy.
Do you offer free shipping and where do you deliver to?
We offer free shipping and no sales tax on all of our MRCOOL products in the contiguous United States. We do not ship to Alaska, Hawaii, Canada, Puerto Rico or the Caribbean.