The MRCOOL DIY 36K BTU 5th Gen Ductless Mini Split Air Handler is the 230V, 3-ton indoor unit for MRCOOL's largest DIY single-zone systems, moving enough air to condition spaces up to 1,550 square feet. It is the wall-mounted half of the system: the part you see, hear, and interact with every day.
Like every 5th Gen DIY component, it is built for owner installation. It connects to its matching condenser with MRCOOL's pre-charged Quick Connect line set, so there is no vacuum pump, no gauges, and no special tools or refrigerant certification involved. Most homeowners have it mounted and connected in an afternoon.
Ideal Spaces
- Open-plan main floors
- Great rooms and large living areas
- Oversized garages and workshops
- Studio apartments and accessory dwellings
As part of a properly matched 36K system, this air handler serves spaces up to 1,550 square feet. Treat that as a well-insulated best case; leaky construction, tall ceilings, or heavy sun load all argue for conservative sizing.
Features
- Five fan speeds plus Quiet Mode. Sound ranges from 27.5 dBA on low to 55.5 dBA at full blast, so you can trade airflow for silence whenever you want.
- App and voice control. The SmartHVAC app covers iOS and Android, and Amazon Alexa and Google Assistant both work. A wireless remote comes in the box.
- Follow Me technology. The remote acts as a portable thermostat, so the system holds temperature where people actually are.
- Dry Mode. Pulls excess humidity out of the air without overcooling the room.
- Washable filter. The reusable filter rinses clean under a tap, which keeps maintenance simple and free.
- Oscillating louvers. Motorized vanes distribute air across wide rooms instead of one cold lane.
Key Specs
- Capacity class: 36,000 BTU (3 ton)
- Power: 208/230V single phase, 15A max fuse
- Coverage: spaces up to 1,550 square feet
- Sound: 27.5 to 55.5 dBA across 5 fan speeds
- Line connections: 3/8 in liquid, 5/8 in suction
- Filter: washable and reusable
- Mount type: wall, 49.57 in wide and 48.72 lb
- Certifications: AHRI certified; UL and ETL listed
What's Included
-
1 x MRCOOL DIY 36K BTU 5th Gen Ductless Mini Split Air Handler, DIY-36-HP-WMAH-230D25-O, 230V (remote control included)
What you should know
This listing is the indoor air handler only. It does not include a condenser or line set, so it is the right buy if you are replacing the wall unit on an existing DIY 5th Gen 36K system or assembling a custom setup. If you are starting from scratch, a complete system bundle is the simpler and usually cheaper route.
Generation matching matters. The 5th Gen runs on R-454B and its components only pair with other 5th Gen parts; a 3rd or 4th Gen condenser or line set will not work with this head. Check that your line set matches the 3/8 in liquid and 5/8 in suction connections before ordering.
Warranty coverage on 5th Gen equipment is 5 years on parts and 7 years on the compressor, and the air handler you are buying here falls under the parts coverage.
Warranty
- 7-year compressor warranty
- 5-year parts warranty
Specifications:
|
BRAND NAME |
MRCOOL |
|
SERIES |
DIY 5th gen Single-Zone Mini-splits |
|
MODEL |
DIY-36-HP-WMAH-230D25-O |
|
GTIN |
840255587068 |
|
UPC |
840255587068 |
|
SHORT DESCRIPTION |
MRCOOL 36K DIY 5th Generation Mini-Split Air Handler 230V |
|
TONNAGE |
3 |
|
VOLTAGE (V) |
208/230 |
|
PHASE |
1 |
|
CYCLE |
60 |
|
MAX FUSE BREAKER (A) |
15 |
|
MIN CIRCUIT AMPACITY (A) |
3 |
|
MOUNT TYPE |
Wall |
|
COLOR |
White |
|
MAX COVERAGE AREA |
1,550 sq. ft. |
|
DECIBEL RATING LOW (DBA) |
27.5 |
|
DECIBEL RATING HIGH (DBA) |
55.5 |
|
NUMBER OF SPEEDS |
5 |
|
OSCILLATION |
Yes |
|
LIQUID LINE SIZE |
3/8 in |
|
SUCTION LINE SIZE |
5/8 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 |
|
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) |
11.1 |
|
NET HEIGHT (IN) |
14.25 |
|
NET WIDTH (IN) |
49.57 |
|
NET WEIGHT (LBS) |
48.72 |
|
GROSS DEPTH (IN) |
18.74 |
|
GROSS HEIGHT (IN) |
16.57 |
|
GROSS WIDTH (IN) |
53.94 |
|
GROSS WEIGHT (LBS) |
67.9 |
Need help?
Call us at 1-800-514-2418 and our HVAC product specialists will answer your questions and help customize your MRCOOL DIY 36K 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.