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Some eligible split systems offer precharged options; packaged, furnace, and traditional configurations follow professional-installation paths.
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Build a matched MRCOOL DIY multi-zone system from zones through line-set lengths.
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Shop Mini Splits
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Shop systems
All mini splits
Single-zone systems
Multi-zone systems
DIY mini splits
Professional-install systems
Ceiling cassette systems
Series & generation
5th Gen DIY E-Star
5th Gen DIY HyperHeat
DIY Select · black & white
EasyPro · 5th Gen EZPRO
Olympus · pro install
Advantage · pro install
BTU size & voltage
9,000 BTU
12,000 BTU
18,000 BTU
24,000 BTU
36,000 BTU
115V systems
208/230V systems
Zones & indoor units
2-zone DIY systems
3-zone DIY systems
4-zone DIY systems
5-zone DIY systems
6-zone DIY systems
Wall-mount indoor units only
Ceiling cassette units only
Outdoor condensers only
Shop complete systems
5th Gen DIY comfort
Shop complete E-Star single-zone systems.
Shop E-Star systems →
Installation path
Designed for DIY Installation
Explore homeowner-oriented mini splits with factory-precharged connection options.
Shop DIY systems →
Installation path
Professional Installation
Compare Olympus and Advantage systems intended for traditional HVAC installation.
Compare systems →
Planning a complete system?
Financing Available
Explore payment options for a complete multi-zone purchase.
View financing →
Need a custom combination?
Build a DIY Multi-Zone System
Choose zones, indoor units and line-set lengths for your project.
START BUILDING →
Shop Central HVAC
⌄
Shop equipment
Central heat pumps & equipment
Dual fuel · heat pump + gas
A/C + gas furnace systems
Packaged HVAC units
Furnaces & gas packages
Shop by series
VersaPro · 2nd Gen
HyperHeat · 2nd Gen
Universal · 2nd Gen
Signature Series
Capacity & components
2 ton · 24,000 BTU systems
3 ton · 36,000 BTU systems
5 ton · 60,000 BTU systems
Air handlers · indoor only
Condensers · outdoor only
Electric heat strips
Explore central HVAC
Whole-home comfort
Explore systems, equipment and installation options.
Explore central HVAC →
Before you choose
Installation Varies by Configuration
Some eligible split systems offer precharged connection options. Packaged, furnace, and traditional configurations follow professional-installation paths.
Get selection help →
Mix ducted & ductless
Build a DIY Hybrid System
Plan compatible ducted and ductless zones together.
Open Hybrid Builder →
Planning a whole-home purchase?
Financing Available
Review payment options for larger equipment purchases.
Explore financing →
Sizing & planning
Manual J Load Calculator
Estimate heating and cooling loads before selecting equipment.
Open Manual J →
Specialty HVAC
⌄
Comfort for the road
RV air conditioning
TravelCool
Inverter-driven rooftop cooling and supplemental heat-pump heating for RV applications.
Explore TravelCool →
All-in-one HVAC
Monoblock Heat Pumps
Heating and cooling without a separate outdoor unit.
Shop Monoblock →
Walk-in cooling
Compact Refrigeration
Self-contained refrigeration for walk-in cooler and freezer applications.
Explore Refrigeration →
Large-space airflow
Industrial HVLS Fans
Large-diameter fans for warehouses and other expansive spaces.
Shop HVLS Fans →
More specialty
Water Heaters
→
MRBREEZE
→
View all Specialty Equipment
→
Parts & Accessories
⌄
Replacement parts
All replacement parts
DIY Series replacement parts
Universal replacement parts
Control boards
Fan motors
Fan blades & blower wheels
Sensors, switches & valves
Installation essentials
All installation accessories
Line sets
DIY precharged line sets
Extension bundles
Couplers & control wire
Precharged line-set adapters
Condenser mounts & pads
Covers, drainage & controls
Line-set cover kits
Cover fittings & extensions
Condensate pumps
Drain systems & accessories
Thermostats & controls
Surge protection & electrical
Tools, gauges & supplies
Cleaners & maintenance
Replacement parts
Start with your model number
Shop genuine MRCOOL replacement parts. Confirm equipment details before ordering.
Shop replacement parts →
Installation & accessories
Installation essentials
Line sets, mounting, kits, controls, and installation accessories.
Shop accessories →
Build Your System
⌄
System Builders
›
Multi-Zone System Builder
Hybrid System Builder
Olympus System Builder
Sizing Tools
›
Mini-Split BTU Calculator
Manual J Load Calculator
HVAC Replacement & Sizing Guide
Recommended
Primary configuration tool
Build a DIY Multi-Zone System
Build a matched MRCOOL DIY multi-zone system from zones through line-set lengths.
Start building →
Sizing tools
Find the right size
Use the BTU calculator or Manual J tools before choosing equipment.
Start sizing →
After you plan
Explore Payment Options
After configuring and sizing your project, review available financing options.
View financing →
Learn
⌄
Start Learning
›
Mini Splits 101
DIY Installation Guide
Tools & Calculators
Help & Reference
›
DIY FAQs
Error Codes
QMID Codes
Official Product Information
›
Knowledge Center
Manuals & Documents
AHRI & EnergyGuide Resources
View All Learning Center
Learn the basics
New to MRCOOL? Start here
Get straightforward guides for choosing, planning, and installing your system.
Start learning →
Support
⌄
Customer Support
›
Contact Us
Shipping & Tracking
Warranty
Start a Return
Programs & Policies
›
Pro Contractor Program
Price Match Guarantee
Financing
Customer support
How can we help?
Contact our team, track an order, start a return, or find warranty help.
Get help →
Price Match
Financing
USA's Most Trusted MRCOOL Dealer – Free Shipping On Systems*
What are you shopping for?
Build Your MRCOOL Line Guard Cover
1. Number of Line Sets
How many line sets do you need to cover?
1
2
3
4
5
Next
2. Select Length for Each Line Set
Previous
Next
3. Choose Cover Color
White
Grey
Brown
Previous
Next
4. Choose Accessories
Previous
Next
5. Extra Cover Sections?
Yes
No
Previous
Next
6. Installation Notes
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Next
7. Line Set Cutter Tool
Yes, add line set cutter
Previous
Next
Add to Cart
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