What's in the box
- 10-year compressor warranty
- 10-year parts warranty
- 10-year labor warranty
Free curbside shipping on eligible MRCOOL® systems across the continental U.S. Most products ship in 3–5 business days and arrive in 4–10 days, depending on your location. Freight carriers will call to schedule delivery.
Returns accepted within 30 days on new, unopened items in original packaging. A restocking fee of up to 35% may apply for HVAC equipment — we’ll always confirm before issuing a return authorization.
Each MRCOOL® system is backed by manufacturer warranty coverage as defined by product and model — typically 5–10 years on major components. Register your system after installation to activate full coverage.
Need help with sizing, voltage or compatibility? Email support@coolheatdirect.com — our U.S. team replies within one business day.
MODEL: UHP1836AH1836-O
Efficient Whole-Home Comfort. Built for Powerful Year-Round Performance.
If your current HVAC system struggles to keep your home comfortable, creates uneven temperatures, or drives up monthly energy bills, the MRCOOL® Universal® Series 36K BTU 3 Ton Heat Pump System offers a smarter, more efficient solution.
Designed for dependable year-round heating and cooling, this complete central ducted system delivers consistent comfort throughout your home while helping reduce energy consumption. Whether you're replacing an aging HVAC system, upgrading your home's efficiency, or completing a new construction project, the Universal® Series provides the performance, reliability, and flexibility modern homeowners expect.
Advanced DC inverter technology continuously adjusts output to match real-time heating and cooling demands, helping maintain stable indoor temperatures while reducing energy waste. Unlike traditional systems that frequently cycle on and off, this intelligent operation improves efficiency, enhances comfort, and promotes quieter day-to-day performance.
The multi-position air handler offers installation flexibility for a variety of home layouts, while optional heat kits provide supplemental or emergency heating when additional cold-weather support is needed. Combined with environmentally friendly R-454B refrigerant and high-efficiency performance, this system is built to deliver long-term comfort and value.
Backed by a 10-Year Limited Parts Warranty and 2-Year Limited Labor Warranty, the MRCOOL® Universal® Series 36K Heat Pump System is a dependable investment in your home's comfort, efficiency, and peace of mind.
Why You’ll Love It
✅ Up to 18 SEER2 efficiency
✅ Powerful 36,000 BTU cooling capacity
✅ 37,000 BTU heating capacity
✅ Lower monthly heating and cooling costs
✅ Advanced DC inverter technology
✅ Consistent whole-home comfort
✅ Flexible installation configurations
✅ Optional electric heat kit compatibility
✅ Environmentally friendly R-454B refrigerant
✅ Backed by industry-leading warranty protection
Best For
- Homeowners replacing an older central HVAC system
- Homes around 1,400–1,700 sq ft
- Reducing high heating and cooling costs
- New builds, renovations, and HVAC upgrades
- Homeowners wanting modern inverter efficiency
- Reliable year-round whole-home comfort
What's Included
- MRCOOL® Universal® Series 36K BTU Inverter Condenser
- MRCOOL® Universal® Series 36K BTU Multi-Position Air Handler
- Factory-installed evaporator coil
- Electronic Expansion Valve (EXV)
- Installation and operation manuals
Questions, answered
Everything homeowners ask before buying a MRCOOL® system.
Installation
Do I need an HVAC technician to install this?
No. MRCOOL® DIY systems are designed for homeowner installation. The pre-charged Quick Connect® line set means there's no refrigerant handling, no vacuum pump, and no special tools or license required.
How long does installation take?
Most single-zone systems go in within a few hours: mount the indoor air handler, set the outdoor condenser, connect the pre-charged line set, and power it on.
Do I need an electrician?
The system needs a dedicated circuit. Most homeowners have a licensed electrician add the breaker and disconnect — everything else you can do yourself.
Sizing & compatibility
What BTU size do I need?
As a rule of thumb: up to 400 sq ft → 9–12K BTU, 400–600 sq ft → 12–18K, 600–1,000 sq ft → 18–24K. Use the room-size guide above and factor in insulation, ceiling height and sun exposure.
Will it heat in winter?
Yes — these are heat pumps, so they heat and cool. Many MRCOOL® systems keep heating in sub-freezing temperatures; check each model's spec sheet for its low-temperature heating range.
115V or 230V — which do I need?
9K–12K units are usually 115V (standard outlet circuit); 18K and larger are typically 230V. The voltage is shown in the product options and specifications.
Warranty & support
What warranty is included?
MRCOOL® systems carry manufacturer warranty coverage — typically 5–10 years on major components when you register your system after installation.
How do I get help choosing or installing?
Email support@coolheatdirect.com — our U.S. team replies within one business day with sizing, voltage and compatibility help.
Shipping & returns
How fast does it ship?
Most products ship in 3–5 business days with free curbside delivery in the continental U.S. The freight carrier calls to schedule your delivery.
Can I return it?
Returns are accepted within 30 days on new, unopened items in original packaging. A restocking fee may apply to HVAC equipment — we always confirm before issuing a return authorization.
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