What Comes in a MRCOOL DIY Kit? (Everything Included)

Every MRCOOL DIY single-zone mini split kit includes the major components you need to complete your installation, plus the core accessories that make DIY installs faster and cleaner. Multi-zone DIY bundle kits include the same essential components, but are designed to support multiple indoor air handlers on one outdoor condenser. The main things you still need are proper electrical service to the condenser and any optional upgrades like mounting, surge protection, or cosmetic line set covers.

Last updated: January 2026

Key Takeaways

✅ Our single-zone DIY kits include the condenser, air handler, bracket, line set, control wire, and install accessories

✅ Multi-zone DIY bundles include the same essential components (scaled for multiple zones)

⚠️ You must provide 115V or 230V power to the outdoor condenser (model dependent)

💡 Indoor air handler(s) receive power through the included control wire (no separate power runs needed for each unit)

What’s Included in Our MRCOOL DIY Single-Zone Mini Split Kits

All of our DIY mini split single-zone kits come with the components and install accessories needed for a complete DIY install.

Outdoor Condenser

  • The outdoor unit that powers heating and cooling for the system

Indoor Air Handler

  • Wall-mounted indoor air handler

Wall Mount Air Handler Bracket

  • Included with every kit for proper mounting

Pre-Charged Line Set

  • Pre-charged refrigerant line set for DIY installation

Control Wire (Communication Cable)

  • Included control wire used to connect the indoor and outdoor units

Wall Sleeve

  • Helps protect and clean up the wall opening where the lines pass through

Line Set UV Wrap

  • Helps protect the line set from sunlight exposure and long-term wear

Sealant Clay for the Wall Hole

  • Used to seal around the wall penetration for a tighter, cleaner finish

What’s Included in Our MRCOOL DIY Multi-Zone Bundle Kits

Our multi-zone DIY bundle kits include all the same essential components you get with our single-zone kits.

The difference is that a multi-zone system is built to support:

multiple indoor air handlers running from one outdoor condenser

This gives you independent comfort control in multiple rooms while keeping the outside of your home cleaner with fewer outdoor units.

Power Requirements (Important Before You Install)

Every MRCOOL mini split system requires electrical power to be run to the outdoor condenser.

Depending on your system model, you will need:

115V or 230V electrical service to the condenser.

Indoor Unit Power (Simplifies Installation)

On MRCOOL mini split systems, the indoor air handler(s) receive their power through the included control wire connection from the condenser, meaning you typically do not need to run separate power supplies to each indoor unit.

This makes both single-zone and multi-zone installs cleaner and easier to plan.

What You May Still Need (Required or Common Add-Ons)

Even with a complete kit, most installs require a few additional items depending on your setup, mounting location, and local electrical code.

Electrical Connection Items (Disconnect Box + Wire Whip)

You will need a safe, code-compliant way to connect your home’s electrical service to the outdoor unit.

We offer:

  • disconnect boxes
  • wire whips

These provide the connection point where your home electrical service circuit connects to the system.

Outdoor Condenser Mounting Options

Every condenser needs a stable mounting solution. We offer:

  • composite condenser pads
  • wall mount condenser brackets
  • condenser risers

Risers are especially helpful in areas with:

  • snow buildup
  • heavy rainfall
  • drainage concerns
  • uneven ground

Surge Protection (Highly Recommended)

We strongly recommend installing a quality surge protector.

Modern mini split systems are essentially computer-controlled HVAC systems, which makes them more susceptible to damage from:

  • power surges
  • lightning events
  • unstable electrical supply

A surge protector is a small upgrade that can help prevent expensive repairs later.

Line Set Covers (Optional Protection + Clean Look)

Your line set already includes:

  • insulation
  • UV wrap

However, if you want additional UV protection and/or a cleaner finished look, we offer:

  • complete line set cover kits
  • individual line hide components

Line set covers are great for:

  • long outdoor runs
  • visible installations
  • protecting lines from physical damage
  • improving curb appeal

Common Mistakes to Avoid

Mistake #1: Assuming power goes to the indoor unit
MRCOOL systems are powered at the condenser, and the indoor unit(s) receive power through the control wire connection.

Mistake #2: Forgetting the disconnect box
Many installs require a disconnect near the outdoor unit. Plan for it upfront.

Mistake #3: Skipping surge protection
Control boards aren’t cheap. Surge protection is.

Mistake #4: Not planning your mounting method
Pad, wall bracket, or risers should be chosen based on location and climate.

FAQ

Do your single-zone DIY kits include a pre-charged line set?

Yes. Our single-zone DIY kits include a pre-charged line set, control wire, and essential install accessories.

Is the indoor mounting bracket included?

Yes. The wall mount air handler bracket is included with the kit.

Do I need to run power to the indoor air handler?

No. On MRCOOL mini split systems, the indoor air handler(s) receive power through the included control wire connection from the condenser.

Do I still need an electrician?

You may. Electrical requirements vary by local code. You must provide proper 115V or 230V power to the outdoor condenser.

Do I need a disconnect box?

Many installs require one, and it’s strongly recommended even when not required. We offer disconnect boxes and wire whips to complete the setup.

Do I need line set covers?

Not required, but recommended for additional protection and a clean finished appearance. Your line set already includes insulation and UV wrap.

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