MRCOOL® DIY® Select 1st Gen - 9K BTU 115V Mini Split System – 17.5 SEER2 Heat Pump – Easy Install – R454B – Up to 400 Sq Ft (DIYS-09-HP-115A11-O) White Wall Mount Air handler + Condenser - 11.5ft pre-charge line set.

Product Description 

If you’ve been looking for a simple way to heat and cool a smaller space without paying thousands in installation costs, this system is exactly what you’ve been waiting for.

The MRCOOL DIY Select 9K BTU Mini Split System (115V) is built for homeowners who want real performance without needing an HVAC technician. Designed by MRCOOL, this system combines powerful heating and cooling with one of the easiest installation processes in the industry.

This bundle includes both the outdoor condenser and indoor wall-mounted air handler, giving you a complete single-zone system capable of efficiently conditioning spaces up to 400 sq ft.

What makes this system stand out is how truly DIY-friendly it is. The included Quick Connect® line set comes pre-charged with R-454B refrigerant, so there’s no need for vacuum pumps, gauges, or special tools. The included DIYPRO® cable also eliminates the need for conduit, making installation faster and cleaner.

On top of that, you’re getting strong performance with 17.5 SEER2 efficiency, helping keep your power bill down while maintaining consistent comfort year-round.

Control everything from your phone using the MRCOOL app, or use voice commands with Alexa or Google Assistant for a hands-free experience.

Whether you’re upgrading a bedroom, garage, office, or small living space, this system delivers reliable comfort without the usual headaches.

WHY THIS SYSTEM SELLS 

✔ True DIY Installation – No HVAC tools or license required
✔ Pre-Charged Quick Connect® Line Set (11.5 ft included)
✔ 115V Power – Easier install than 230V systems
✔ Heats & Cools – Full heat pump system
✔ 17.5 SEER2 Efficiency – Lower energy bills
✔ Smart App + Voice Control (Alexa & Google)
✔ Ultra Quiet – As low as 18 dBA indoors
✔ Gold Fin® Protection – Built to last
✔ Perfect for Rooms up to 400 Sq Ft

BREAKER SIZE + ELECTRICAL 

Electrical Requirements (IMPORTANT)

• Voltage: 115V
• Phase: 1
• Minimum Circuit Ampacity: 17 Amps
• Recommended Breaker Size: 20 Amp
• Max Fuse/Breaker: 20 Amps

 Real-world tip: Even though the air handler lists 15A, always size your breaker based on the condenser specs — that’s what pulls the load.

SYSTEM PERFORMANCE 

• Cooling Capacity: 9,000 BTU
• Heating Capacity: 9,000 BTU
• SEER2 Rating: 17.5
• EER2: 9.8
• HSPF2-4: 8.8
• Coverage: Up to 400 sq ft

WHAT’S INCLUDED 

✔ Outdoor Condenser (115V)
✔ Indoor Wall-Mounted Air Handler
✔ 11.5 ft Pre-Charged Line Set
✔ 13 ft DIYPRO® Communication Cable
✔ Remote Control
✔ Installation Hardware

TECH SPECS 

System Type: Mini Split Heat Pump
Zone: Single Zone
Refrigerant: R-454B
Inverter: Yes

Indoor Unit:

• Noise: 18–43 dBA
• Size: 28.7”W x 11.5”H x 7.87”D
• Filter: Reusable

Outdoor Unit:

• Noise: 54 dBA
• Compressor: Rotary
• Max Line Length: 75 ft

Line Sizes:

• Liquid: 1/4”
• Suction: 3/8”

Warranty Information

The MRCOOL DIY Select 12K BTU Mini Split System is backed by a strong manufacturer warranty for peace of mind:

• 2-Year Compressor Warranty
• 1-Year Parts Warranty
• 1-Year Remote Warranty

This coverage ensures reliable long-term performance and protection for your investment.

Frequently Asked Questions about the MRCOOL DIY Select 9K BTU Mini Split System

Q: Can I really install this myself?
Yes. This system is specifically designed for DIY installation using pre-charged lines and simple connections.

Q: What breaker size do I need for this system?
You will need a 20 amp breaker on a 115V circuit.

Q: How big of a room will this cool?
This system is ideal for spaces up to 400 square feet.

Q: Does this system heat as well?
Yes, it is a full heat pump system that provides both heating and cooling.

Q: Do I need special tools to install it?
No vacuum pump or gauges are required.

Q: Is this system energy efficient?
Yes, with a 17.5 SEER2 rating, it is designed to reduce energy costs.

This MRCOOL DIY 9k BTU 115V mini split complete system is one of the best solutions for homeowners looking for a powerful, energy-efficient, and easy-to-install HVAC system.”