MRCOOL

MRCOOL is a manufacturer of ductless mini-split air conditioners, heat pumps, and central ducted heat pump systems for residential and light commercial applications. Development began in 2012, brand launched in 2014, headquartered in Hickory, Kentucky with a 250,000-sq-ft facility and a a manufacturing expansion in Graves County, Kentucky in 2025. The product line includes the DIY 5th Generation (R-454B, pre-charged QuickConnect, up to 23.5 SEER2), Easy Pro (contractor-installed, pre-charged 16-ft line set, up to 20.2 SEER2), Universal Series (pairs with existing air handlers, up to 18.6 SEER2), ProDirect (R-410A, ETL listed, extendable 10-yr warranty), Central Ducted Hyper Heat 2nd Gen (R-454B), and GeoCool Inverter (ENERGY STAR geothermal). AHRI certified, UL listed, ETL listed. Standard warranty: 5-yr parts, 7-yr compressor, 2-yr labor.

Product Lines

MRCOOL DIY 5th Generation Mini-Split

Pre-charged R-454B mini-split with QuickConnect line sets allowing homeowners to complete line set connection without refrigerant handling. Available 9,000-36,000 BTU, up to 23.5 SEER2. DIY Hyper Heat 5th Gen rated to -22 degrees F ambient for cold climate heating.

MRCOOL Easy Pro Mini-Split

Contractor-installed residential mini-split, 9,000-24,000 BTU, up to 20.2 SEER2, pre-charged 16-ft line set, Wi-Fi control. Designed for professional HVAC contractor installation in residential and light commercial single-zone applications.

MRCOOL Universal Series

Designed to pair with any existing air handler in multi-zone central ducted systems, 24,000-60,000 BTU, up to 18.6 SEER2. Addresses replacement and retrofit applications where existing air handler and duct system are in place.

MRCOOL ProDirect Series

Contractor-installed mini-split using R-410A, 13-15.2 SEER2, ETL listed, AHRI certified. Conventional refrigerant system with standard installation workflow. Warranty extendable to 10 years.

MRCOOL Central Ducted Hyper Heat 2nd Generation

Central heat pump system, 24,000-60,000 BTU, R-454B refrigerant. For contractor installation in central ducted residential applications replacing conventional central AC or gas furnace with an inverter heat pump.

MRCOOL GeoCool Inverter

ENERGY STAR certified geothermal heat pump for residential ground loop or water source applications, inverter-driven compressor for variable-capacity operation.

Why Contractors Specify MRCOOL

HVAC contractors specify MRCOOL because the ProDirect and Easy Pro lines are AHRI certified, UL listed, and ETL listed for contractor-installed residential applications with conventional installation methods. The Universal Series addresses retrofit by pairing with existing air handlers, reducing central system upgrade scope. The Central Ducted Hyper Heat 2nd Gen provides an R-454B inverter heat pump for central ducted residential applications. MRCOOL is US-headquartered and expanding in Kentucky. Standard warranty: 5-yr parts, 7-yr compressor, 2-yr labor; ProDirect extendable to 10 years.

How to Choose a MRCOOL Product

The most important decision variable is the installation type: homeowner DIY, contractor single-zone, contractor multi-zone central ducted, or geothermal. For homeowner self-installation avoiding refrigerant handling, the DIY 5th Generation (pre-charged QuickConnect, up to 36,000 BTU/23.5 SEER2) is appropriate; DIY Hyper Heat extends to -22 degrees F. For contractor-installed single-zone residential with pre-charged line set and Wi-Fi, the Easy Pro (9,000-24,000 BTU/20.2 SEER2). For retrofit pairing with an existing air handler, the Universal Series (24,000-60,000 BTU/18.6 SEER2). For conventional R-410A contractor-installed systems with extendable warranty, the ProDirect (13-15.2 SEER2). For R-454B central ducted heat pump at higher capacities, the Central Ducted Hyper Heat 2nd Gen. For geothermal, the GeoCool Inverter (ENERGY STAR).

FAQs

Where is MRCOOL headquartered and when was the brand launched?
Development began in 2012; brand launched in 2014; headquartered in Hickory, Kentucky with a 250,000-sq-ft facility. a manufacturing expansion in Graves County, Kentucky in 2025.

What warranty does MRCOOL offer?
Standard: 5-yr parts, 7-yr compressor, 2-yr labor. ProDirect extendable to 10 years. Limited Lifetime Compressor warranty available with registration on applicable models.

What refrigerant does MRCOOL use in its DIY systems?
MRCOOL DIY 5th Generation uses R-454B, a lower-GWP A2L refrigerant meeting current EPA requirements. ProDirect uses R-410A. Central Ducted Hyper Heat 2nd Gen also uses R-454B. Verify refrigerant type per model before service or installation.

Does the MRCOOL DIY mini-split require a licensed HVAC technician to install?
The QuickConnect line sets allow the line set connection without refrigerant handling or HVAC technician certification for that step. Professional electrical connection and startup are still required in most jurisdictions. The DIY designation refers to the line set connection step, not the full installation. Check local codes and permit requirements before beginning.

What is the difference between the MRCOOL DIY 5th Generation and the Easy Pro?
The DIY 5th Generation is designed for homeowner self-installation with pre-charged QuickConnect line sets, up to 36,000 BTU at 23.5 SEER2. The Easy Pro is for HVAC contractor installation with a pre-charged 16-ft line set, up to 24,000 BTU at 20.2 SEER2. The Easy Pro is designed for professional contractor workflow, not homeowner DIY.

What certifications do MRCOOL systems carry?
AHRI certified, UL listed, ETL listed across the product line. Select models are ENERGY STAR certified, including the GeoCool Inverter.