MRCOOL DIY 5th Gen Hyper Heat 12,000 BTU ceiling cassette system
MRCOOL DIY 5th Gen · Single-zone systems · 12,000 BTU
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MRCOOL DIY 5th Gen Hyper Heat 12,000 BTU ceiling cassette system (DIYHH-12-HP-C-230D25-O / DIYCASSETTE12HP-230D25-O) is a 12,000 BTU system from MRCOOL DIY 5th Gen. It has a ceiling cassette indoor unit, runs on 208/230V, is rated 22.2 SEER2, has an HSPF2 of 10.8, puts out 11,500 BTU/h of heat at 5 °F, heats down to -22 °F by the brand's rating, uses R-454B refrigerant, and carries a 7-year compressor warranty.
| Category | Single-zone systems |
|---|---|
| Model number | DIYHH-12-HP-C-230D25-O / DIYCASSETTE12HP-230D25-Odoxrepo.mrcool.com |
| Size ? | 12,000 BTU/hdoxrepo.mrcool.com |
| Indoor unit style ? | Ceiling cassettedoxrepo.mrcool.com |
| Voltage ? | 208/230Vdoxrepo.mrcool.com |
| Outdoor unit model | DIYHH-12-HP-C-230D25-Odoxrepo.mrcool.com |
| Indoor unit model | DIYCASSETTE12HP-230D25-Odoxrepo.mrcool.com |
| SEER2 (cooling efficiency) ? | 22.2energystar.gov |
| EER2 (efficiency at 95 °F) ? | 12.5energystar.gov |
| HSPF2 (heating efficiency) ? | 10.8energystar.gov |
| Rated cooling capacity ? | 12,000 BTU/henergystar.gov |
| Heating capacity at 47 °F ? | 12,500 BTU/henergystar.gov |
| Heating capacity at 17 °F ? | 11,900 BTU/henergystar.gov |
| Heating capacity at 5 °F ? | 11,500 BTU/henergystar.gov |
| COP at 5 °F ? | 2.1energystar.gov |
| Heats down to ? | -22 °Fmrcool.com |
| Refrigerant ? | R-454Benergystar.gov |
| ENERGY STAR certified ? | yesenergystar.gov |
| ENERGY STAR cold climate ? | yesenergystar.gov |
| Line connection ? | Quick-connectdoxrepo.mrcool.com |
| Wi-Fi control | — |
| Indoor sound level (quietest) | — |
| Outdoor sound level | — |
| Compressor warranty ? | 7 yearsdoxrepo.mrcool.com |
| Parts warranty ? | 5 yearsdoxrepo.mrcool.com |
| Warranty if you install it yourself ? | Keptdoxrepo.mrcool.com |
| Sold as | Single product |
| Availability | Sold by several retailers |
Warranty, and installing it yourself
Self-installing keeps the warranty, by MRCOOL's own terms.
"This warranty applies only to systems that are installed according to the installation instructions, and in accordance with all applicable local, state or province, and federal laws and regulations including but not limited to electrical codes and permits."
From doxrepo.mrcool.com ↗, read 2026-10-14. Terms change, and local law can require a licensed technician for refrigerant or electrical work whatever the warranty says.
- 7 years on the compressor
- 5 years on parts
"The unit comes standard with a 5 year parts and 7 year compressor warranty."
From doxrepo.mrcool.com ↗, read 2026-10-14.
Who makes it
inferred Most likely made by Midea. Its ENERGY STAR certification lists exactly the same figures (capacity at 47, 17 and 5 °F, SEER2, EER2, HSPF2, COP and refrigerant) as a model Midea certifies under its own name. the Midea record ↗
ENERGY STAR record 3798939 (MRCOOL DIYHH-12-HP-C-230D25-O + DIYCASSETTE12HP-230D25-O) has the same cooling and heating capacities, SEER2, EER2, HSPF2, COP at 5 °F and refrigerant as record 3723113 (MDV MOX330-12HFPN10-M1X + MCBM-12HRFPN10-M1), which GD MIDEA AIR-CONDITIONING EQUIPMENT CO., LTD. certifies itself.
Also certified with identical figures by MDV.
Where this came from
confirmed The part number and every spec shown were read from the brand's or a store's own material: a product page, a spec sheet or a product feed, or an archived copy of one. Last verified 2026-10-14. What the labels mean.
The equivalent in other lines
Same category, same size (12k), ceiling cassette, 208/230V, from other lines; cheapest first, at most two per line. Open any of them side by side with this system, or tick several to compare up to four.