MRCOOL DIY 5th Gen 3-Zone 36,000 BTU Ductless Mini Split Air Conditioner & Heat Pump (9K+9K+18K), - DIY3-B-36HP
Take control of your comfort with the MRCOOL DIY 5th Gen Multi-Zone Mini Split System - the easiest and most affordable way to get powerful, energy-saving heating and cooling without hiring a pro.Whether it’s hot summer days or freezing winter nights, the MRCOOL DIY Mini Split keeps your home comfortable and your energy bills low. Smart. Simple. Affordable.
Features
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Three Rooms, Perfect Comfort: Heat or cool three spaces that are 350 sq. ft., 350 sq. ft. and 750 sq. ft. each with independent temperature control for personalized comfort.
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Truly DIY-Friendly: Forget expensive installs - no HVAC license or special tools required. If you can use basic hand tools, you can do this.
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No Hassle Setup: Comes with pre-charged Quick-Connect line sets, so there’s no messy refrigerant handling or vacuuming. Just connect and enjoy.
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Year-Round Savings: Boasting up to 23 SEER2 cooling efficiency and 9.9 HSPF2-4 heating performance, this system delivers serious energy savings.
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Built for Every Season: Stay cozy even in the dead of winter - reliable heating works all the way down to -13°F.
What our Experts Think
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Strong Zoned Comfort – Designed to deliver 36,000 BTU total across three zones (9K + 9K + 18K indoor units), this system lets you customise heating and cooling for multiple rooms or areas, improving comfort and reducing energy waste.
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All-Season Climate Control – Functions as both a high-efficiency air conditioner and heat pump, offering reliable performance year-round—cooling in summer and heating in winter.
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5th Gen DIY-Friendly Setup – Part of the MRCOOL DIY 5th Gen platform with pre-charged quick-connect line sets, the system significantly simplifies installation without specialised HVAC equipment.
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Energy-Smart Zoning – Independent control for each indoor unit allows tailored comfort in each room, helping lower energy costs by conditioning only occupied spaces.
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Quiet, Balanced Operation – Indoor units are engineered for quiet performance while maintaining strong airflow and temperature stability.
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Reliable Core Components – Robust outdoor condenser and quality indoor units provide dependable performance and comfort in residential and light-commercial applications.
Q&A
Q: What is the MRCOOL DIY 5th Gen 3‑Zone 36,000 BTU Mini Split (DIY3‑B‑36HP)?
A: A complete multi‑zone ductless HVAC system with three indoor units (two ~9,000 BTU and one ~18,000 BTU) paired to a single outdoor condenser for efficient cooling and heating in three separate zones.
Q: What capacity does it offer?
A: Total 36,000 BTU, ideal for multiple rooms or zones like living areas, bedrooms, offices, and dens.
Q: Is this system DIY‑friendly?
A: Yes — designed for easier DIY installation with pre‑charged quick‑connect refrigerant lines and user‑friendly components.
Q: Why choose a 3‑zone system?
A: It lets you independently control temperatures in three different areas, increasing comfort and reducing energy use.
Q: What performance features does it include?
A: Efficient inverter technology, quiet operation, reliable heating and cooling, and multiple operating modes for year‑round comfort.
Q: Who is it best for?
A: Homeowners, DIY installers, and HVAC pros looking for a flexible, zoned climate control solution without ductwork.
Maintenance Tips
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Strong Zoned Comfort – Designed to deliver 36,000 BTU total across three zones (9K + 9K + 18K indoor units), this system lets you customise heating and cooling for multiple rooms or areas, improving comfort and reducing energy waste.
-
All-Season Climate Control – Functions as both a high-efficiency air conditioner and heat pump, offering reliable performance year-round—cooling in summer and heating in winter.
-
5th Gen DIY-Friendly Setup – Part of the MRCOOL DIY 5th Gen platform with pre-charged quick-connect line sets, the system significantly simplifies installation without specialised HVAC equipment.
-
Energy-Smart Zoning – Independent control for each indoor unit allows tailored comfort in each room, helping lower energy costs by conditioning only occupied spaces.
-
Quiet, Balanced Operation – Indoor units are engineered for quiet performance while maintaining strong airflow and temperature stability.
-
Reliable Core Components – Robust outdoor condenser and quality indoor units provide dependable performance and comfort in residential and light-commercial applications.
Damage 
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