Mrcool Olympus 4th Gen Air Handlers O-12-HP-WMAH-230C-O wall-mounted ductless mini-split indoor unit with sleek front panel and airflow vents

Mrcool Olympus 4th Gen Air Handlers O-12-HP-WMAH-230C-O compact air handler shown in angled view highlighting vent louvers and modern design

Roll over image to zoom in Click on image to zoom

Mrcool Olympus 4th Gen Air Handlers O-12-HP-WMAH-230C-O

Name: Mrcool Olympus 4th Gen Air Handlers O-12-HP-WMAH-230C-O
Brand: MRCOOL
SKU: Olympus O-12-HP-WMAH-230C-O
Price: 401.00 USD
Availability: InStock

★★★★★

Iron Line Verified

Authorized Dealer: MRCOOL

Official Partner

IN STOCK & RECEIVE IN 2-7 DAYS

SKU: Olympus O-12-HP-WMAH-230C-O

Price:

$401.00

Quantity:

Financing as low as ~$6 / month (60 mo. terms) Estimate your payment

We pay your sales tax! (IL excluded) 📦 Order before 7 PM CST for same-day shipping.

Share this product

Section 179
Tax Savings

Save up to $84.21 on this equipment Estimate Your Tax Deduction

Calculate Savings →

Commercial Buyer?

Unlock volume pricing and dedicated facility support with Trade Accounts
(Requires minimum of 2+ items)

12K BTU indoor air handler, part of MRCOOL's professional-install Olympus line
Runs on 230V power
Wi-Fi app control, Alexa/Google compatible
Pairs with the matching Olympus 12K single-zone condenser
Meant for professional installation, not the DIY line

Order Placed

Ships Out

Delivered

*Please Note: This timeline is an estimate. Certain products may require an additional 1 week for manufacturing. Please speak with your sales rep, Matthew, for official details and confirmation before placing your order.

CALL US FOR THE MOST ACCURATE AND COMPETITIVE LTL SHIPPING RATE, (888) 308-5580

Get Questions Answered Fast

Experience: 20+ Years B2B • Origin: US-Based Support

EXPRESS SHIPPING

Most orders process in 1-3 days. Yes, even if it weights 400lb

Hassle-Free Returns

No restocking fees. Ever.

Manufacturer Warranty

Fully backed by the brands you trust.

Dedicated Rep Mathew

Speak to a US-Based Equipment Specialist: (888) 308-5580

Flexible Financing

Get Upto 60 Months Financing

High Efficiency • Smart Wi-Fi Control • Ultra-Quiet Comfort

MRCOOL Olympus 4th Gen Air Handlers O-12-HP-WMAH-230C-O

The MRCOOL Olympus 4th Gen Air Handlers O-12-HP-WMAH-230C-O is a high-performance 12,000 BTU (1 ton) ductless mini-split indoor unit designed to deliver reliable heating and cooling for spaces up to 550 square feet. Built with advanced inverter technology and optimized energy efficiency ratings of SEER2 25.5, EER2 13, and HSPF2-4 10.6, this system ensures reduced energy consumption while maintaining consistent indoor comfort. With integrated Wi-Fi, smart app functionality, and compatibility with voice assistants like Amazon Alexa and Google Assistant, this air handler provides modern climate control with maximum convenience and flexibility.

MRCOOL Olympus 4th Gen Air Handlers O-12-HP-WMAH-230C-O Applications

Bedrooms, living spaces, and residential areas up to 550 sq ft
Home offices and studios requiring quiet and efficient climate control
Garages, workshops, and converted interior spaces
Light commercial zones needing targeted temperature management
Multi-zone HVAC systems paired with compatible MRCOOL Olympus condensers

Perfect for medium-sized rooms where energy efficiency, quiet performance, and smart connectivity are essential.

MRCOOL Olympus 4th Gen Air Handlers O-12-HP-WMAH-230C-O Specifications

Brand	MRCOOL
Series	Olympus 4th Gen Air Handlers
Model	O-12-HP-WMAH-230C-O
Unit Type	Mini-Split (Wall Mounted)
Tonnage	1 Ton
Cooling Capacity	12,000 BTU
Voltage	208/230V, 1 Phase, 60Hz
Max Fuse Breaker	15 A
Minimum Circuit Ampacity	3 A
Coverage Area	Up to 550 sq ft
Refrigerant	R-454B (Eco-Friendly)
Sound Level Range	19.5 – 47 dBA
Fan Speeds	5 Variable Speeds
Liquid Line Size	1/4"
Suction Line Size	3/8"
Dimensions (WxHxD)	33.74" × 11.81" × 9.09"
Net Weight	22.93 lbs

MRCOOL Olympus 4th Gen Air Handlers O-12-HP-WMAH-230C-O Performance & Features

High energy efficiency with SEER2 25.5, EER2 13, and HSPF2-4 10.6 for lower operating costs.
Ultra-quiet operation down to 19.5 dBA for minimal noise disruption.
Smart HVAC app integration for remote system control via iOS and Android devices.
Voice control compatibility with Amazon Alexa and Google Assistant.
5-speed variable fan system for customized airflow and comfort levels.
Oscillating louvers provide even air distribution across the entire space.
Reusable air filter reduces maintenance costs and improves air quality.
Multiple operation modes including Sleep Mode, Auto Cool, and Fan Only.
Compact wall-mounted design simplifies installation and maximizes usable space.
Eco-friendly R-454B refrigerant supports environmental responsibility while maintaining performance.

MRCOOL Olympus 4th Gen Air Handlers O-12-HP-WMAH-230C-O System Compatibility

Compatible with MRCOOL Olympus multi-zone outdoor units:
O-ES-12-HP-C-230C-O1
MULTI3-18HP230C-O
MULTI4-27HP230C-O
MULTI5-36HP230C-O
MULTI6-48HP230C-O

Designed for flexible multi-zone configurations, allowing precise temperature control in multiple rooms.

MRCOOL Olympus 4th Gen Air Handlers O-12-HP-WMAH-230C-O Certifications & Warranty

UL Listed, CSA Listed, and ETL Listed for safety and reliability
5-Year Parts Warranty
7-Year Compressor Warranty (when paired with system)
Limited Lifetime Warranty coverage
Remote control included with 5-year warranty
California Proposition 65 compliant

Why Choose the MRCOOL Olympus 4th Gen Air Handlers O-12-HP-WMAH-230C-O

High-efficiency performance for energy savings
Smart control with Wi-Fi, app, and voice assistant integration
Quiet operation suitable for living and working environments
Flexible installation with compact wall-mounted design
Reliable comfort backed by strong manufacturer warranties

The MRCOOL Olympus 4th Gen Air Handlers O-12-HP-WMAH-230C-O delivers powerful, efficient, and intelligent climate control, making it an ideal solution for modern residential and light commercial applications.

Key Information

Order Cutoff Time: 2:00 PM EST
Order Handling Time: 1–3 business days (Monday–Friday)
Transit Time: 1–7 business days (Monday–Friday)
Total Estimated Delivery Time: 3–11 business days (Monday–Friday)
Shipping Availability: Free Shipping On some Items In The Contiguous United States only

For more information Click Here

Request Expert Consultation

Our tool specialists are ready to help you find the perfect solution for your specific application.

CAPITAL ACCESS

EQUIPMENT FINANCING

AVAILABLE

Preserve cash flow with up to 60 month financing.

Job Site Proven

Trusted by Facilities and manufacturing centers

JLT #180A-M2 Pneumatic Panel Flattener Customer review image

Travis Farwell | Farwell's Fine Woodworking Field Verified

I hope this helps

"I have attached the pictures of how I use my panel flattener. I hope this helps."

JLT #180A-M2 Pneumatic Panel Flattener

Mike Yaross Field Verified

Just what I needed

"Saw works great. Just what I needed. You may want to update the specs though. It says 110v but it’s 220v. I don’t think it will an 10” saw blade either. Haven’t tried but I don’t think it’s set up for one like it says. Ordering process was nice and easy. Thank you."

Castaly 12" Radial Arm Saw RS-612

FRANCISCO, Shop Manager Field Verified

Built for 24/7 Production

"Got the JLT #717C for our shop and it’s an absolute beast for narrow stile doors. The 2-second squaring cycle is legit—we’re easily pushing 100+ perfect doors a day now without stressing over glue joint alignment. Setup is super fast with the pin system, and the heavy-duty build takes daily abuse without losing accuracy."

JLT #717C Cabinet Door Clamp

JLT Pressurized A8 Glue Tank for PVA Glue PIZ.9001 in shop

Lincoln Lakes Ind | Lincoln Lakes Industries LLC Field Verified

Thanks for the service!

"Here are 2 pictures of the glue tank in our shop. I hesitated to send anything as it is not in its final place but perhaps it's good enough for you. We are using it for our drawer box station and assembly station. Thanks for the service!"

JLT Pressurized A8 Glue Tank for PVA Glue PIZ.9001

Gedalya Glauber Field Verified

Purchased Machine for Partner

"I purchased this machine for our partner in China to use. We had some issues but we were able to get them fixed thanks to iron line tools."

Virutex CE53S Edge Lipping Planer for Perfect Flush Edges 5300199

Virutex TWOO AB200 Corded Dowel Jointer (120V) 7900799 vertical dowel joint cutting on panel surface ensuring precise alignment and repeatable results

David & Joyce West Field Verified

I know this will meet my requirements

"haven't had a chance to use it but it looks like a well built product have a few projects down the road and I know this will meet my requirements. so hats off to your team! David"

Virutex TWOO AB200 Corded Dowel Jointer (120V) 7900799

Virutex AU93 Double Edge Trimmer And Scraper + RC21E Manual End Trimmer SET 2800086 complete edge finishing tool set shown with dual edge trimmer and manual end trimmer.

Stuart Casterlin | Stuart Casterlin Custom Cabinets and Fine Woodworking, Inc. Field Verified

Both Tools Work Great

"Both tools work great and are real time savers . The two tools that I received from your company were replacements for the exact same tools that I've used for the past years, I think its safe to say 20+ years. Extremely pleased with product and service."

Virutex AU93 Double Edge Trimmer And Scraper + RC21E Manual End Trimmer SET 2800086

Bradley Cole, CB Anderson Shutter Co Field Verified

They are just what we needed

"We use these clamps daily, and they're very helpful for our work. We are always happy to support a small business."

JLT #812B Clamp Design

California Air Tools 10020DCAD-22060 2.0 Hp Ultra Quiet Oil-Free 10 Gallon Air Compressor angled view with dual piston pump

Mike T., Shop Manager Field Verified

Quiet, Fast, and Totally Worth It

"Bought this California Air Tools compressor for the shop and it’s an absolute game changer. It’s incredibly quiet—you can actually have a normal conversation right next to it without yelling. It fills up fast, keeps up with all our nailers and blowguns with zero issues, and the oil-free pump means no maintenance. If you're tired of loud, annoying compressors ruining the vibe on your floor, grab this bad boy. Worth every penny."

Jet 16" x 40" Engine Lathe: Geared Head, 230 V 3 Phase, 3-1/8" Spindle Bore Dia, 25 to 1,800 RPM JT9-321381

Mark D. | Machine Shop Foreman Field Verified

Heavy Duty & Precise

"Brought this Jet 16" x 40" Engine Lathe into the shop recently and it’s an absolute beast. The 3-1/8" spindle bore is exactly what we needed for turning larger bar stock, and the geared head runs incredibly smooth from 25 all the way up to 1,800 RPM. It handles our heavy daily metalwork without breaking a sweat, and you can see how solid the build is right in the photo. If you need a reliable 3-phase lathe that holds tight tolerances all day, grab this bad boy. Worth every penny."

Jet Tools Lathe

Euroboor TCT 1" Depth Annular Cutter tungsten carbide tipped annular cutter designed for high-performance drilling in hard steel and abrasive materials.

LEKS KAMIHIRA Field Verified

Yep we got the cutter

"Yep we got the cutter. We haven’t used it, the project we purchased it for has ended. Shipping was fast and I had no issues getting my order"

Euroboor TCT 1" Depth Annular Cutter

Virutex Hand-Held Hot Air Edgebander Set AG52F AG98F AU93 RC21E 5200199 showing complete kit with edgebander, tape roll holder, and accessories

Jesse Pegorsch Field Verified

The edge bender is working great!

"The edge bender is working great! I’ll keep you in mind next time I need something for my shop"

Virutex Hand-Held Hot Air Edgebander Set AG52F: AG98F + AU93 + RC21E 5200199

Virutex Wheel Cutter Set of 2 Wheel Cutters for Laminate and Veneer 1527075 in retail packaging showing replacement cutting wheels

Bryce Bamsey Field Verified

Thanks for checking in.

"I believe they are working well judging by none of the guys have said anything about them other than a thank you for swapping them out for them hahah. So thanks for checking in."

Virutex Wheel Cutter Set Of 2 Wheel Cutters For Laminate And Veneer 1527075

Jesse Browning Field Verified

Figured it out

"I had issues initially with the order but iron line tools helped me figure it out and sent me another Handheld Gluer. Very good service."

Virutex EM125T Handheld Gluer With Upper Roller 2500300

Frequently Asked Questions

This 12,000 BTU (1 ton) wall-mounted air handler is rated for spaces up to 550 sq ft, making it a fit for medium-sized bedrooms, living areas, and offices.

MRCOOL lists this model at SEER2 25.5, EER2 13, and HSPF2-4 10.6, using inverter technology to reduce energy use.

It works with the Olympus O-ES-12-HP-C-230C-O1 single-zone condenser and the MULTI3-18HP230C-O, MULTI4-27HP230C-O, MULTI5-36HP230C-O, and MULTI6-48HP230C-O multi-zone condensers.

It requires 208/230V, single-phase, 60Hz power with a 15 A maximum fuse/breaker and a 3 A minimum circuit ampacity.

Yes, built-in Wi-Fi lets you run it from the MRCOOL smart HVAC app on iOS or Android and by voice through Amazon Alexa or Google Assistant, and a remote control is included.

The indoor unit measures 33.74" W x 11.81" H x 9.09" D and weighs 22.93 lbs, and it connects with a 1/4" liquid line and 3/8" suction line.