Compare mini-splits & heat pumps / MrCool DIY 5th Gen
MrCool · DIY 5th Gen
MrCool DIY 5th Gen 18,000 BTU 230V
Model DIY-18-HP-C-230D25-O · DIY-18-HP-WMAH-230D25-O
SCORE6.9 / 10
The size we'd look at first for a garage on a 230V circuit: 12,800 BTU/h at 5°F and more heat at -13°F than the 24k. We don't have a verified Amazon listing for this size.
Specs
| Spec | MrCool DIY 5th Gen 18,000 BTU 230V |
|---|---|
| Nominal size | 18,000 BTU |
| Voltage | 230V |
| Rated heat at 47°F | 18,000 BTU/h |
| Heat at 17°F | 13,400 BTU/h |
| Heat at 5°F | 12,800 BTU/h |
| Lowest heating temp | -13°F |
| Max heat at lowest temp | 12,200 BTU/h |
| SEER2 | 22.5 |
| HSPF2 (Region IV) | 11.5 |
| Install type | Quick-connect |
| Line set in box | 25 ft |
| Max line run | 75 ft |
| Warranty covers owner install | Yes |
| Warranty, parts | 5 yr |
| Warranty, compressor | 7 yr |
| ENERGY STAR Cold Climate | Yes |
| ENERGY STAR | Yes |
| Refrigerant | R-454B |
| Electrical | 208/230V, 18 A min circuit ampacity, 20 A max breaker |
| Heat at 17°F, maximum | 20,300 BTU/h |
| Max rise | 65.6 ft |
Sources: NEEP ccASHP list · MRCOOL DIY 5th Gen install manual · MRCOOL DIY 5th Gen warranty (rev. 07.03.25) · MRCOOL product data
Before you buy
- MRCOOL also called its older R-410A 4th Gen DIY "E Star"; confirm R-454B and a model number of the form DIY-...D25-O.
- DIYS- is the cheaper DIY Select and EZPRO- is the Easy Pro; a listing that says "5th Gen" and "Select" is the Select.
- The manual says the line sets install once; reconnecting them, or the pipes at the outdoor unit, voids the warranty.