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Understanding 9,000 & 12,000 BTU Mini Split Systems
These smaller-capacity systems are perfect for single rooms, home offices, additions, or spaces where targeted heating and cooling is needed without the complexity of a multi-zone setup. The outdoor condenser is sized to match a single indoor air handler, delivering efficient, room-specific comfort.
For example:
9,000 BTU system → Ideal for small bedrooms, home offices, or sunrooms up to ~350 sq. ft.
12,000 BTU system → Perfect for master bedrooms, living rooms, or open spaces up to ~550 sq. ft.
Not sure if this is the right size? Use our Mini Split Sizing Guide to match BTU to your space.
This allows you to:
Add heating and cooling to a single room without ductwork
Supplement an existing HVAC system for problem areas
Enjoy ultra-quiet operation and energy efficiency
Want to understand total project costs? See our Mini Split Cost Guide.
Great for garage conversions, ADUs, basement finishes, or any space where you want independent temperature control without affecting the rest of the home.
MRCOOL DIY Select 9K BTU Single Zone Ductless Heat Pump Split System | 17.5 SEER2 | 115V with 11.5ft Line Set | Covers 400 Sq Ft | Wall Mounted | White or Black
$1,249.00MRCOOL DIY Select 9K BTU Wall Mounted Complete System – White or Black Product Overview The MRCOOL® DIY® Select 9K BTU 115V Ductless Mini-Split Heat Pump System delivers powerful, energy-efficient heating and...
MRCOOL DIY Select 12K BTU Single Zone Ductless Heat Pump Split System | 17.5 SEER2 | 115V with 11.5ft Line Set | Covers 550 Sq Ft | Wall Mounted | White or Black
$1,399.00MRCOOL DIY Select 12K BTU Wall Mounted Complete System – White or Black Product Overview The MRCOOL® DIY® Select 12K BTU 115V Ductless Mini-Split Heat Pump System delivers powerful, energy-efficient heating and...
MRCOOL DIY Easy Pro 9K BTU Single Zone Ductless Heat Pump Split System | 20.2 SEER2 | 115V with 11.5ft Line Set | Covers 400 Sq Ft | Wall Mounted | Model EZPRO-09-HP-11511DE-O
$1,487.00The MRCOOL® DIY Easy Pro® 9K BTU 115V Wall Mounted Ductless Mini-Split Heat Pump System delivers dependable, energy-efficient heating and cooling for spaces up to 400 square feet . This complete system pairs the EZPRO-09-HP-C-11511DE-O outdoor...
MRCOOL DIY Easy Pro 12K BTU Single Zone Ductless Heat Pump Split System | 19.5 SEER2 | 115V with 11.5ft Line Set | Covers 550 Sq Ft | Wall Mounted | Model EZPRO-12-HP-11511DE-O
$1,599.00The MRCOOL® DIY Easy Pro® 12K BTU 115V Wall Mounted Ductless Mini-Split Heat Pump System delivers dependable, energy-efficient heating and cooling for spaces up to 550 square feet . This complete system pairs the EZPRO-12-HP-C-11511DE-O outdoor...
MRCOOL DIY 5th Gen 9,000 BTU Mini Split 1 Zone Ductless Air Conditioner & Heat Pump - 1 Room 375 SQ. FT - WALL MOUNTED - DIY-09-HP-WM-115D25-O
$2,329.00Take Control of Your Comfort with the MRCOOL DIY 5th Gen 9K BTU Mini-Split Your true DIY heating & cooling solution for spaces up to 375 sq. ft. Tired of...
MRCOOL DIY 5th Gen 12,000 BTU Mini Split 1 Zone Ductless Air Conditioner & Heat Pump - 1 Room 500 SQ. FT - WALL MOUNTED - DIY-12-HP-WM-115D25-O
$2,359.00MRCOOL DIY 5th Gen 12K BTU Complete System Bundle | Single-Zone Mini-Split for 350–500 Sq. Ft. Everything you need in one box: 12K BTU indoor + outdoor units, 25‑ft pre‑charged...