MrCool 5th Gen Complete System: What's in the Box

Everything You Get with a MrCool DIY 5th Gen Bundle

One of the biggest advantages of buying a MrCool DIY 5th Gen bundle from HVACZAR is that everything arrives together, ready to install. No hunting for parts, no compatibility guessing, no separate orders.

Let's go through every single item in the box so you know exactly what to expect on delivery day.

The Major Components

1. Outdoor Condenser Unit

The outdoor unit houses the inverter compressor, condenser coil, and fan. It's the "engine" of the system.

Key specs (12K model):

• Dimensions: 31.5" x 21.7" x 11.4"
• Weight: 66 lbs
• Refrigerant: R-454B (pre-charged)
• Operating range: -13°F to 122°F
• Sound level: 56 dB

The condenser arrives pre-charged with R-454B refrigerant — the new low-GWP replacement for R-410A that meets 2025 EPA regulations. You never handle refrigerant during installation.

2. Indoor Air Handler (Wall-Mounted)

The sleek indoor unit distributes conditioned air throughout your room.

Key specs (12K model):

• Dimensions: 34.5" x 11.5" x 8.0"
• Weight: 22 lbs
• Minimum sound: 22 dB
• Airflow: 180-490 CFM
• Washable filter included

The air handler has built-in WiFi for smart home integration — it works with the MrCool app, Google Home, Amazon Alexa, and Apple HomeKit right out of the box.

3. Pre-Charged Line Set (25 ft)

This is what makes MrCool's DIY installation possible. The copper line set comes pre-charged with refrigerant and sealed with patented Quick Connect fittings.

• 25 feet of insulated copper refrigerant lines
• Quick Connect fittings on both ends (indoor and outdoor)
• No vacuum pump needed
• No brazing or soldering
• No EPA 608 certification required

The 25-foot length works for most installations. If you need less, you simply coil the excess behind the outdoor unit. The line set includes both the liquid line (smaller diameter) and suction line (larger diameter) bonded together with insulation.

4. Communication Wire

A 25-foot communication cable connects the indoor and outdoor units. This low-voltage wire carries signals between the units so they operate in sync. It runs alongside the line set through the same wall penetration.

5. Drain Line

A condensate drain hose routes moisture from the indoor unit to the outside. During cooling, the evaporator coil produces condensation that needs to drain. The included hose runs through the wall alongside the line set.

Mounting Hardware Included

Indoor Unit Mounting Plate

A steel bracket that screws into wall studs. The air handler hooks onto this plate. Mounting screws and wall anchors are included.

Outdoor Unit Rubber Isolation Pads

Four vibration-dampening rubber feet that go under the condenser. These reduce vibration transfer and noise.

Note: A concrete pad or wall-mounting bracket for the outdoor unit is NOT included. Most homeowners either pour a small concrete pad, buy a pre-made plastic condenser pad ($20-$40 at hardware stores), or purchase a wall bracket separately.

Tools and Installation Aids

Hole Saw Adapter

A guide for drilling the 3.5-inch wall penetration hole. You supply the hole saw bit and drill.

Putty / Wall Sleeve

Sealing putty to weatherproof the wall penetration after running the line set through.

Flare Wrench Set

Two wrenches for tightening the Quick Connect fittings. MrCool includes the exact sizes needed — you don't need to buy specialty HVAC tools.

Documentation

• Installation manual (detailed step-by-step with diagrams)
• Owner's manual
• Warranty registration card
• Quick-start WiFi setup guide

The installation manual is thorough and well-illustrated. MrCool also has complete installation videos on their YouTube channel, and Zomg the Handyman at zomgthehandyman.com has done full walkthrough installs that many of our customers reference.

What You'll Need to Supply

A few items aren't included that you'll need:

1. Drill with 3.5" hole saw bit — for the wall penetration
2. Level — for mounting the indoor bracket straight
3. Stud finder — to locate wall studs
4. Screwdriver or impact driver — for mounting screws
5. Pipe cutter or hacksaw — only if you need to trim drain hose
6. Condenser pad or bracket — to support the outdoor unit
7. Dedicated electrical circuit — 115V/15A for 9K/12K models, 230V/20A for 18K/24K/36K models

Most homeowners already have items 1-5 in their tool collection.

Bundle vs Buying Components Separately

HVACZAR sells the MrCool DIY 5th Gen as a complete bundle — indoor unit, outdoor unit, line set, and all accessories together. This guarantees compatibility and typically saves $100-$200 versus buying components individually.

Some retailers sell the condenser and air handler separately, leaving you to source the correct line set. This introduces risk: wrong line set length, wrong fitting type, incompatible refrigerant. With the bundle, everything is matched and guaranteed to work together.

Available Sizes

The MrCool DIY 5th Gen bundle comes in five sizes:

Order Your Complete Bundle

Get the MrCool DIY 5th Gen bundle from HVACZAR with free shipping and everything you need in one delivery. Use code SUMMER100 for $100 off. From unboxing to cool air in a single weekend.