Product overview
MRCOOL DIY Select 12K 12,000 BTU 17.5 SEER2 Mini Split Air Conditioner and Heat Pump System - R454B - 115V
Introducing the MRCOOL® DIY® Select 12,000 BTU system, the newest and most budget-friendly addition to the legendary DIY mini-split family. Designed for homeowners who want professional-grade comfort without the professional price tag, the Select series balances high-end performance with a streamlined, "no-frills" approach that makes it the most accessible entry point into the world of ductless heating and cooling.
Whether you're climate-controlling a small office, a bedroom, or a backyard workshop, the DIY Select delivers the reliability MRCOOL is known for at a price that fits any project budget. This 12,000 BTU system is perfect for areas around 400-600 sq ft.
Key Features:
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Ultimate Affordability: The DIY Select is specifically engineered to be the most cost-effective system in the DIY lineup, offering significant upfront savings while still providing 5th Generation efficiency and technology.
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Patented Quick Connect® Technology: Forget the vacuum pumps and specialized gauges. This system uses MRCOOL’s signature pre-charged line sets and screw-on fittings, allowing you to complete the entire installation in just a few hours with basic tools.
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Compact 11.5ft Line Set: Optimized for "back-to-back" installations, the included 11.5ft pre-charged line set is the perfect length for mounting an indoor air handler directly opposite the outdoor condenser on an exterior wall, minimizing clutter and simplifying the install.
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High Performance: Powered by the latest R-454B refrigerant, the Select series is future-proofed for environmental regulations and offers excellent SEER2 ratings for low monthly energy bills.
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Smart Control Anywhere: Features built-in Wi-Fi compatibility, allowing you to adjust temperatures, set schedules, and monitor performance through the MRCOOL SmartHVAC app, Amazon Alexa, or Google Assistant
What's Included?
1 x MRCOOL DIY 12K Select 1st Gen Condenser - DIYS-12-HP-C-115A11-O
1 x MRCOOL DIY 12K Select 1st Gen Air Handler- DIYS-12-HP-WMAH-115A13-O
1 x 11.5 ft. 1/4 x 3/8 Line Set Quick Connect Lineset
1 x 13ft 14/4 Communication Wire
1 x MRCOOL Remote Control
General Specs:
|
Cooling Capacity |
Btu/h |
9000 |
12000 |
17000 |
23000 |
|
SEER2 |
Btu/hr/w |
17.5 |
17.5 |
17.3 |
16.5 |
|
EER2 |
Btu/hr/w |
9.8 |
8.5 |
9.0 |
8.6 |
|
Heating Capacity |
Btu/h |
9000 |
12000 |
18000 |
23000 |
|
HSPF2-4 |
Btu/hr/w |
8.8 |
9.0 |
8.5 |
8.3 |
|
HSPF2-5 |
Btu/hr/w |
6.8 |
6.8 |
6.5 |
6.3 |
|
Max Coverage Area |
sq. ft. |
Up to 400 |
Up to 550 |
Up to 800 |
Up to 1050 |
|
Indoor Noise Level (Turbo / Hi / Mi / Lo / Si) |
dB(A) |
43 / 35 / 31 / 22 / 18 |
44.5 / 40 / 35 / 25.5 / 17.5 |
46.5 / 43 / 36.5 / 30 / 18.5 |
51.5 / 45.5 / 40.5 / 26.5 / 21.5 |
|
Outdoor Noise Level dB(A) 54 54 55 61 |
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*Max Coverage Area is determined using ideal installation conditions. |
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Condenser Specs:
| BRAND NAME | MRCOOL |
| SERIES | DIY Select |
| MODEL | DIYS-12-HP-C-115A11-O |
| GTIN | 840255595674 |
| UPC | 840255595674 |
| UNIT TYPE | Mini-Split |
| EQUIPMENT TYPE | Condenser |
| SHORT DESCRIPTION |
DIY Select 1st Gen - R454B - 12K BTU 115V Condenser w/ 11ft Install Kit
|
| SEER2 | 17.5 |
| EER2 | 8.5 |
| HSPF2-4 | 9 |
| HSPF2-5 | 6.8 |
| TONNAGE | 1 |
| COOLING CAPACITY (BTU) | 12000 |
| HEATING CAPACITY (BTU) | 12000 |
| VOLTAGE (V) | 115 |
| PHASE | 1 |
| CYCLE | 60 |
| MAX FUSE BREAKER (A) | 20 |
| MIN CIRCUIT AMPACITY (A) | 19.5 |
| COLOR | White |
| ZONE CAPACITY | 1 |
| REFRIGERANT TYPE | R-454B |
| REFRIGERANT VOLUME (OZ) | 21.52 |
| DECIBEL RATING (DBA) | 54 |
| INVERTER | Yes |
| LINESET INCLUDED | Yes |
| LINE SET LENGTH | 11.5 ft. |
| MAX LINESET LENGTH (FT) | 75 ft. |
| LIQUID LINE SIZE | 1/4 |
| SUCTION LINE SIZE | 3/8 |
| COMPRESSOR MOTOR TYPE | Rotary |
| CONDENSER FAN MOTOR TYPE | DC |
| CONDENSER FAN MOTOR RPM | 800/700/600 |
| METERING DEVICE | EEV |
| UL LISTED | Yes |
| CSA LISTED | Yes |
| ETL LISTED | Yes |
| ENERGY STAR CERTIFIED | No |
| AHRI CERTIFIED | Yes |
| BASE WARRANTY | 1 Year Parts, 2 Years Compressor |
| BASE PARTS WARRANTY | 1 Year Parts |
| BASE COMPRESSOR WARRANTY | 2 Years Compressor |
| CONTAINS ELECTRONICS | Yes |
| CONTAINS CHEMICALS | Yes |
| CONTAINS COMPRESSED GAS | Yes |
| PROPOSITION 65 WARNING | Yes |
| NET DEPTH (IN) | 10.63 |
| NET HEIGHT (IN) | 19.49 |
| NET WIDTH (IN) | 28.35 |
| NET WEIGHT (LBS) | 54.89 |
| GROSS DEPTH (IN) | 16.54 |
| GROSS HEIGHT (IN) | 27.36 |
| GROSS WIDTH (IN) | 36.22 |
| GROSS WEIGHT (LBS) | 67.24 |
Air Handler Specs:
| BRAND NAME | MRCOOL |
| SERIES | DIY Select |
| MODEL | DIYS-12-HP-WMAH-115A13-O |
| GTIN | 840255595599 |
| UPC | 840255595599 |
| UNIT TYPE | Mini-Split |
| EQUIPMENT TYPE | Air Handler |
| SHORT DESCRIPTION |
DIY Select 1st Gen - R454B - 12K BTU 115V White Wall Mounted Air Handler - with 13' Communication Cable
|
| TONNAGE | 1 |
| VOLTAGE (V) | 115 |
| PHASE | 1 |
| CYCLE | 60 |
| MAX FUSE BREAKER (A) | 15 |
| MIN CIRCUIT AMPACITY (A) | 3 |
| COLOR | White |
| MAX COVERAGE AREA | 550 sq. ft. |
| ZONE CAPACITY | 1 |
| REFRIGERANT TYPE | R-454B |
| DECIBEL RATING LOW (DBA) | 17.5 |
| DECIBEL RATING HIGH (DBA) | 44.5 |
| LIQUID LINE SIZE | 1/4 |
| SUCTION LINE SIZE | 3/8 |
| BLOWER MOTOR TYPE | DC |
| BLOWER MOTOR RPM | 850/750/450 |
| FILTER TYPE | Reusable |
| ADJUSTABLE THERMOSTAT | Yes |
| FAN ONLY OPTION | Yes |
| SLEEP MODE | Yes |
| AUTO COOL | Yes |
| WIFI COMPATIBILITY | Yes |
| APP COMPATIBILITY | Yes |
| WORKS WITH IOS | Yes |
| WORKS WITH ANDROID | Yes |
| REMOTE CONTROL INCLUDED | Yes |
| BASE WARRANTY | 1 Year Parts |
| BASE PARTS WARRANTY | 1 Year Parts |
| BASE REMOTE WARRANTY | 1 Year |
| HAS BATTERIES | Yes |
| CONTAINS ELECTRONICS | Yes |
| CONTAINS CHEMICALS | Yes |
| CONTAINS COMPRESSED GAS | Yes |
| PROPOSITION 65 WARNING | Yes |
| NET DEPTH (IN) | 7.87 |
| NET HEIGHT (IN) | 11.61 |
| NET WIDTH (IN) | 31.57 |
| NET WEIGHT (LBS) | 24.91 |
| GROSS DEPTH (IN) | 13.97 |
| GROSS HEIGHT (IN) | 16.34 |
| GROSS WIDTH (IN) | 36.02 |
| GROSS WEIGHT (LBS) | 35.71 |
In-stock systems ship fast and free with curbside freight delivery, typically arriving in 4–10 days. Please inspect each box at delivery and note any damage on the receipt before signing — it keeps any freight claim quick and simple.
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At a glance
Tech specs
| Condenser capacity | 12,000 |
|---|---|
| Indoor unit(s) | 12K |
| Coverage area | 600 Sq Ft. |
| Zones / rooms | 1 Zone |
| Power | 115 Volt |
| Line set | Custom |
| Mount type | Wall |
| Installation | DIY Installation |
| Brand | MRCOOL |
Sizing in doubt? Our HVAC experts confirm capacity for your rooms before you order — free. Ask us about utility rebates for high-efficiency heat pumps in your area.
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