MRCOOL DIY® 5th Gen 12,000 BTU Single-Zone Mini Split System 115V with 25 ft DIY Quick Connect (DIY-12-HP-WM-115D25-O)

The MRCOOL DIY® 5th Gen 12,000 BTU Single-Zone Mini Split System 115V with 25 ft DIY Quick Connect (DIY-12-HP-WM-115D25-O) is the only 12,000 BTU mini-split you can install yourself thanks to MRCOOL's patented Quick Connect® pre-charged refrigerant lines — no vacuum pump, no EPA license, no HVAC contractor required.

Built for bedroom / 1-car garage. Designed to cool and heat 400-600 sq ft, with a 22.5 SEER2 efficiency rating that drops your operating cost vs. older mini-splits and traditional central HVAC.

Why this MRCOOL system

• Clean, Healthy Air: Self-cleaning evaporator coil and washable filter eliminate mold, dust, and allergens between cycles. Heats coil to dry condensation and kill mildew automatically.
• Eco-Conscious & Certified: R-454B refrigerant — EPA AIM Act compliant (replaces phased-out R-410A). ENERGY STAR certified for low operating cost and reduced carbon footprint.
• Warranty Protection: 5-year parts + 7-year compressor when registered through the MRCOOL SmartHVAC app. Full manufacturer-backed coverage from an authorized dealer.
• Smart Home Ready: Built-in WiFi controls via the SmartHVAC app — schedules, energy reports, geofencing, push alerts. Alexa & Google Assistant compatible.

Includes 25 ft pre-charged line set. Contact sales for longer-run options.

What's in the box

• Outdoor condenser unit
• Indoor wall-mount air handler
• 25 ft pre-charged Quick Connect® line set
• Wireless remote + wall mounting kit
• Drain hose + condensate pump options

Installation

• Tools: drill, hole saw, level, basic hand tools
• Permit: electrical disconnect typically required (no HVAC permit needed — no refrigerant handling)
• Time: 4–6 hours typical for a single-zone install
• YouTube has 100s of MRCOOL DIY install videos for reference

Shipping

This product ships freight from MRCOOL's distribution network. We email a confirmed shipping quote within 4 business hours of your order before charging your card. Most orders ship within 2-3 business days of approval and arrive in 5-10 business days.

Documentation

Product Brochure (PDF)

Installation Manual (PDF)

Why buy from InnovDepot

• Authorized MRCOOL Dealer — full manufacturer warranty
• Live tech support before, during, and after install (no chatbots)
• Quote-confirmed shipping — no surprise freight surcharges
• 30-day return window on unopened units

SKU: DIY-12-HP-WM-115D25-O | UPC: 840255588546