The MRCOOL DIY 18K BTU 5th Gen Ductless Mini Split Air Handler is a 230V wall-mounted indoor unit that delivers 18,000 BTU of heating and cooling for spaces up to 750 square feet.
It's the indoor half of MRCOOL's popular DIY 5th Gen single-zone system, and the reason people choose it is simple: you can install it yourself. The Quick Connect fittings pair with MRCOOL's pre-charged line sets, so there's no vacuum pump, no gauges, and no special tools or refrigerant certification. Most homeowners have it mounted and connected in an afternoon.
Ideal Spaces
- Master bedrooms and primary suites
- Garage gyms and workshops
- Home offices and dens
- Sunrooms and additions
- Finished basements
- Guest suites and in-law spaces
In a typical insulated room, it will handle up to 750 square feet with no problem. For tougher spaces like a garage or sunroom, plan on around 600 square feet.
Features
- Whisper quiet. Runs as low as 22 dBA, quieter than a library. Most window units are more than twice as loud.
- 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.
- Washable filter. Rinse it and reuse it. No filter subscriptions, no recurring cost.
- Five fan speeds plus Quiet, Sleep, Dry, and Fan Only modes for year-round comfort.
Key Specs
- 18,000 BTU (1.5 ton) heating and cooling
- Covers up to 750 sq ft
- 208/230V, 20A max breaker
- 22 to 46 dBA sound range
- 36.4" W x 12.8" H x 8.9" D, 31 lbs
- 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
What you should know
This is the indoor unit only. It pairs with a matching MRCOOL DIY 5th Gen 18K condenser and pre-charged line set (sold separately), which also makes it the right pick if you're replacing an existing 5th Gen indoor unit.
Warranty
- 7-year compressor coverage
- 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 answer your questions and help customize your MRCOOL DIY 18K BTU 5th Gen 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.