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MRCOOL DIY 5th Gen 12K Single-Zone Mini-Split Heat Pump System (DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O)

Model: DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O · SKU: Not documented

Prepared Nov 12, 2026

Common specifications

Cooling capacity
12,000 BTU/hSource [1]
Heating capacity
12,000 BTU/hSource [1]
SEER2
23.5Source [1]
EER2
12.5Source [1]
HSPF2
10.2Source [1]
Refrigerant
R-454BSource [1]
Refrigerant GWPNot documented
Voltage
115 VSource [1]
Solar input voltageNot documented
Maximum solar inputNot documented
AHRI certificate numberNot documented
Indoor noise
43 dBSource [1]
Outdoor noise
54 dBSource [1]
Indoor unit model
DIY-12-HP-WMAH-115D25-OSource [1, 2, 3]
Outdoor unit model
DIY-12-HP-C-115D25-OSource [1, 2, 3]
Operating temperatureNot documented
Rated current (as printed)Not documented
Power inputNot documented
DimensionsNot documented
WeightNot documented
CommunicationsNot documented
Certifications (as printed)Not documented
Enclosure volumeNot documented
Warranty term
5 yearsSource [3]

All recorded specifications

Cooling capacity
12,000 BTU/hDocumented claim
Conditions

Printed as "Cooling Capacity Btu/h 9000 12000" (the brochure's first table (DIY-09 and DIY-12 systems); the second figure is the DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O system's).

Location: Brochure SPECIFICATIONS, Capacity & Performance, DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O

Printed as "Cooling Capacity Btu/h 9000 12000" (the brochure's first table (DIY-09 and DIY-12 systems); the second figure is the DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O system's).

Location: Brochure SPECIFICATIONS, Capacity & Performance, DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O

[1]
EER2
12.5Documented claim
Conditions

Printed as "EER2 Btu/hr/w 14 12.5" (the brochure's first table (DIY-09 and DIY-12 systems); the second figure is the DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O system's). Manufacturer claim.

Location: Brochure SPECIFICATIONS, Capacity & Performance, DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O

Printed as "EER2 Btu/hr/w 14 12.5" (the brochure's first table (DIY-09 and DIY-12 systems); the second figure is the DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O system's). Manufacturer claim.

Location: Brochure SPECIFICATIONS, Capacity & Performance, DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O

[1]
Heating capacity
12,000 BTU/hDocumented claim
Conditions

Printed as "Heating Capacity Btu/h 10000 12000" (the brochure's first table (DIY-09 and DIY-12 systems); the second figure is the DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O system's).

Location: Brochure SPECIFICATIONS, Capacity & Performance, DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O

Printed as "Heating Capacity Btu/h 10000 12000" (the brochure's first table (DIY-09 and DIY-12 systems); the second figure is the DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O system's).

Location: Brochure SPECIFICATIONS, Capacity & Performance, DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O

[1]
HSPF2
10.2Documented claim
Conditions

HSPF2 for climate region 4, printed as "HSPF2-4 Btu/hr/w 11.5 10.2 HSPF2-5 Btu/hr/w 8.6 7.6" (the brochure's first table (DIY-09 and DIY-12 systems); the second figure is the DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O system's); region 5 is 7.6. Manufacturer claim.

Location: Brochure SPECIFICATIONS, Capacity & Performance, DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O

HSPF2 for climate region 4, printed as "HSPF2-4 Btu/hr/w 11.5 10.2 HSPF2-5 Btu/hr/w 8.6 7.6" (the brochure's first table (DIY-09 and DIY-12 systems); the second figure is the DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O system's); region 5 is 7.6. Manufacturer claim.

Location: Brochure SPECIFICATIONS, Capacity & Performance, DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O

[1]
Indoor noise
43 dBDocumented claim
Conditions

The Turbo figure of "43/39.5/33.5/24/18" (Turbo/Hi/Mi/Lo/Si), printed as "Indoor Noise Level (Turbo/Hi/Mi/Lo/Si) dB(A) 43/39.5/33.5/24/18 43/39.5/33.5/24/18" (the brochure's first table (DIY-09 and DIY-12 systems); the second figure is the DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O system's); MRCOOL prints no measuring distance.

Location: Brochure SPECIFICATIONS, Indoor Noise Level, DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O

The Turbo figure of "43/39.5/33.5/24/18" (Turbo/Hi/Mi/Lo/Si), printed as "Indoor Noise Level (Turbo/Hi/Mi/Lo/Si) dB(A) 43/39.5/33.5/24/18 43/39.5/33.5/24/18" (the brochure's first table (DIY-09 and DIY-12 systems); the second figure is the DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O system's); MRCOOL prints no measuring distance.

Location: Brochure SPECIFICATIONS, Indoor Noise Level, DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O

[1]
Indoor unit model
DIY-12-HP-WMAH-115D25-ODocumented claim
Conditions

Printed in the brochure's MODEL NO. row, in the manual's unit pairing table as "12K (115V) DIY-12-HP-WMAH-115D25-O DIY-12-HP-C-115D25-O" and in the warranty's ductless air handler list. The brochure prints its net dimensions (W x D x H) as 802 x 189 x 297 mm and its net weight as 11.3 kg (24.91 lb) (the brochure's first table (DIY-09 and DIY-12 systems); the second figure is the DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O system's).

Location: Brochure SPECIFICATIONS, MODEL NO. Indoor Unit row; manual unit pairing table; warranty Ductless Air Handlers list

Printed in the brochure's MODEL NO. row, in the manual's unit pairing table as "12K (115V) DIY-12-HP-WMAH-115D25-O DIY-12-HP-C-115D25-O" and in the warranty's ductless air handler list. The brochure prints its net dimensions (W x D x H) as 802 x 189 x 297 mm and its net weight as 11.3 kg (24.91 lb) (the brochure's first table (DIY-09 and DIY-12 systems); the second figure is the DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O system's).

Location: Brochure SPECIFICATIONS, MODEL NO. Indoor Unit row; manual unit pairing table; warranty Ductless Air Handlers list

[1, 2, 3]
Outdoor noise
54 dBDocumented claim
Conditions

Printed as "Outdoor Noise Level dB(A) 54 54" (the brochure's first table (DIY-09 and DIY-12 systems); the second figure is the DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O system's); MRCOOL prints no measuring distance.

Location: Brochure SPECIFICATIONS, Outdoor Noise Level, DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O

Printed as "Outdoor Noise Level dB(A) 54 54" (the brochure's first table (DIY-09 and DIY-12 systems); the second figure is the DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O system's); MRCOOL prints no measuring distance.

Location: Brochure SPECIFICATIONS, Outdoor Noise Level, DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O

[1]
Outdoor unit model
DIY-12-HP-C-115D25-ODocumented claim
Conditions

Printed in the brochure's MODEL NO. row ("MODEL NO. Outdoor Unit DIY-09-HP-C-115D25-O DIY-12-HP-C-115D25-O Indoor Unit DIY-09-HP-WMAH-115D25-O DIY-12-HP-WMAH-115D25-O"), in the manual's unit pairing table as "12K (115V) DIY-12-HP-WMAH-115D25-O DIY-12-HP-C-115D25-O" and in the warranty's condenser list. The brochure prints its net dimensions (W x D x H) as 765 x 303 x 555 mm and its net weight as 29.7 kg (65.48 lb) ("Net Dimension (WxDxH) Indoor inch mm 31.57 x 7.44 x 11.69 802 x 189 x 297 31.57 x 7.44 x 11.69 802x189x297 Outdoor inch mm 30.12 x 11.93 x 21.85 765 x 303 x 555 30.12 x 11.93 x 21.85 765 x 303 x 555"; "Net/Gross Weight Indoor lbs kg 24.91/35.49 11.3/16.1 24.91/35.49 11.3/16.1 Outdoor lbs kg 65.48/83.11 29.7/37.7 65.48/83.11 29.7/37.7", the brochure's first table (DIY-09 and DIY-12 systems); the second figure is the DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O system's).

Location: Brochure SPECIFICATIONS, MODEL NO. Outdoor Unit row; manual unit pairing table; warranty Condensers list

Printed in the brochure's MODEL NO. row ("MODEL NO. Outdoor Unit DIY-09-HP-C-115D25-O DIY-12-HP-C-115D25-O Indoor Unit DIY-09-HP-WMAH-115D25-O DIY-12-HP-WMAH-115D25-O"), in the manual's unit pairing table as "12K (115V) DIY-12-HP-WMAH-115D25-O DIY-12-HP-C-115D25-O" and in the warranty's condenser list. The brochure prints its net dimensions (W x D x H) as 765 x 303 x 555 mm and its net weight as 29.7 kg (65.48 lb) ("Net Dimension (WxDxH) Indoor inch mm 31.57 x 7.44 x 11.69 802 x 189 x 297 31.57 x 7.44 x 11.69 802x189x297 Outdoor inch mm 30.12 x 11.93 x 21.85 765 x 303 x 555 30.12 x 11.93 x 21.85 765 x 303 x 555"; "Net/Gross Weight Indoor lbs kg 24.91/35.49 11.3/16.1 24.91/35.49 11.3/16.1 Outdoor lbs kg 65.48/83.11 29.7/37.7 65.48/83.11 29.7/37.7", the brochure's first table (DIY-09 and DIY-12 systems); the second figure is the DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O system's).

Location: Brochure SPECIFICATIONS, MODEL NO. Outdoor Unit row; manual unit pairing table; warranty Condensers list

[1, 2, 3]
Refrigerant
R-454BDocumented claim
Conditions

Printed as "Refrigerant R-454B oz 30.34 30.34" (the brochure's first table (DIY-09 and DIY-12 systems); the second figure is the DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O system's); this system's charge is 30.34 oz.

Location: Brochure SPECIFICATIONS, REFRIGERANT & PIPING, DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O

Printed as "Refrigerant R-454B oz 30.34 30.34" (the brochure's first table (DIY-09 and DIY-12 systems); the second figure is the DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O system's); this system's charge is 30.34 oz.

Location: Brochure SPECIFICATIONS, REFRIGERANT & PIPING, DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O

[1]
SEER2
23.5Documented claim
Conditions

Printed as "SEER2 Btu/hr/w 23.6 23.5" (the brochure's first table (DIY-09 and DIY-12 systems); the second figure is the DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O system's); the brochure marks its data "*Data provided by AHRI". Manufacturer claim.

Location: Brochure SPECIFICATIONS, Capacity & Performance, DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O

Printed as "SEER2 Btu/hr/w 23.6 23.5" (the brochure's first table (DIY-09 and DIY-12 systems); the second figure is the DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O system's); the brochure marks its data "*Data provided by AHRI". Manufacturer claim.

Location: Brochure SPECIFICATIONS, Capacity & Performance, DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O

[1]
Voltage
115 VDocumented claim
Conditions

Printed as "Power Supply V ~ Hz.Ph 115V, 60Hz, 1Ph 115V, 60Hz, 1Ph" (the brochure's first table (DIY-09 and DIY-12 systems); the second figure is the DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O system's): 115 V AC, 60 Hz, single phase. The same table prints a minimum circuit ampacity of 18 A and a maximum fuse of 20 A for the outdoor unit ("Minimum Circuit Ampacit (Outdoor) A 18 18 Maximum Fuse (Outdoor) A 20 20").

Location: Brochure SPECIFICATIONS, ELECTRICAL PARTS, DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O

Printed as "Power Supply V ~ Hz.Ph 115V, 60Hz, 1Ph 115V, 60Hz, 1Ph" (the brochure's first table (DIY-09 and DIY-12 systems); the second figure is the DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O system's): 115 V AC, 60 Hz, single phase. The same table prints a minimum circuit ampacity of 18 A and a maximum fuse of 20 A for the outdoor unit ("Minimum Circuit Ampacit (Outdoor) A 18 18 Maximum Fuse (Outdoor) A 20 20").

Location: Brochure SPECIFICATIONS, ELECTRICAL PARTS, DIY-12-HP-C-115D25-O + DIY-12-HP-WMAH-115D25-O

[1]

Warranty

Warranty term
5 yearsDocumented claim
Conditions

Printed as "The unit comes standard with a 5 year parts and 7 year compressor warranty."; the five years are the parts term and the compressor term is seven years. Conditions and exclusions are in MRCOOL's warranty document.

Location: Warranty, STANDARD LIMITED WARRANTY COVERAGE

Printed as "The unit comes standard with a 5 year parts and 7 year compressor warranty."; the five years are the parts term and the compressor term is seven years. Conditions and exclusions are in MRCOOL's warranty document.

Location: Warranty, STANDARD LIMITED WARRANTY COVERAGE

[3]

Certificate records

No records documented.

Sources and revisions

  1. MRCOOL 5th Gen DIY Single Zone Series brochure, V: 06.24.26 (systems DIY-09 to DIY-36, outdoor DIY-xx-HP-C and indoor DIY-xx-HP-WMAH units)Official document · Checked https://doxrepo.mrcool.com/mc-diy-5-br-en-01.pdf
  2. MRCOOL DIY Series Single-Zone Mini-Split System installation and owner's manual (version date August 5, 2026)Official installation manual · Checked https://doxrepo.mrcool.com/mc-diy-5-sz-im-um-en-01.pdf
  3. MRCOOL DIY 5th Generation limited warrantyOfficial warranty · Checked https://doxrepo.mrcool.com/mc-diy-5-wr-en-01.pdf