MRCOOL · Single-Zone
O-HH-12-HP-C-230 / O-12-HP-WMAH-230B
~$1,532approximate retailer price at last check, equipment only
Newer version shipping: MRCOOL's R-454B Olympus Hyper Heat (O-HH-12-HP-C-230C-O condenser) is on NEEP's list at 11,500 BTU/h at 5°F; this R-410A B-series is selling through.
Best forMRCOOL fans who want contractor-grade install and real winter output instead of quick-connect convenience.
The Olympus Hyper Heat is MRCOOL's answer to the question 'what if I like the brand but want a real installer and real cold-weather output?' It's the company's pro-install line: conventional flared linesets, no quick-connects, and a low-ambient compressor rated to heat at -13°F — MRCOOL's clear shot at the Mitsubishi/Gree cold-climate middle ground. The numbers are genuinely competitive: 25.5 SEER2, 10.4 HSPF2, R-410A refrigerant, and built-in SmartHVAC WiFi with Alexa and Google support, around $1,532 for the pair before install. The honest context: MRCOOL is a marketing-and-distribution company (the hardware is built by Midea, like much of this market), the Olympus line has far less field history than the DIY series that made the brand famous, and at this price you're within sight of a Gree Vireo Gen3 that heats deeper into the cold. It earns its slot as the pro-installed MRCOOL for people who want the app ecosystem without the DIY compromises.
At 5°F it still makes its full 47°F rated heat, according to the certified NEEP listing for this pairing. MRCOOL rates it to keep running down to -13°F.
Pairing: O-HH-12-HP-C-230B with O-12-HP-WMAH-230B. From NEEP's ccASHP list; a different head or condenser posts different numbers.
No — and that's deliberate. The Olympus is MRCOOL's pro-install line with conventional flared linesets and no quick-connects, so it needs a proper flare, evacuation, and a dedicated 230V circuit. If you want the MRCOOL DIY experience, that's a different product; this one is for buyers who want the brand with a contractor-grade install.
MRCOOL is the badge, not the factory — this is Midea-built hardware, like much of the value segment. The upside is parts commonality and a proven platform; the 25.5 SEER2 / 10.4 HSPF2 ratings are genuinely strong for the ~$1,530 price.
Hyper-heat rated to -13°F, which handles most mixed and cool climates — but Gree's Vireo Gen3 heats to -22°F for about $90 more, so buyers in genuinely cold states have a better option at this price. Where -13°F covers your design temperature, the Olympus's efficiency edge is worth having.
Yes, serviceability: any contractor can work on it with standard parts and practices, unlike quick-connect DIY systems some techs refuse to touch. The catch is that this B-series runs R-410A, so refrigerant for future service will keep getting pricier; MRCOOL's newer Olympus Hyper Heat is on R-454B.
7-year compressor and 5-year parts, without the install caveats attached to MRCOOL's DIY line. It also includes built-in WiFi, which many similarly-priced rivals charge a dongle for.
Series photoMRCOOL · Single-Zone
~$1,615
Two-ton installs with a long lineset run, such as detached garages or outdoor units placed away from the house.
Series photoMRCOOL · Single-Zone
~$1,312
Homes that need a longer lineset run to a 1.5-ton head and have a licensed installer and a plan to register for warranty.
Series photoMRCOOL · Single-Zone
~$989
Budget-minded buyers with a licensed installer lined up for a single bedroom or office up to about 550 sq ft.