Find Your Perfect MRCOOL DIY® System

Tell us about your space and we’ll recommend the right size. It takes about a minute.

Don’t know the square footage? Use length × width
Not sure? Choose “I don’t know” and we’ll give a more conservative recommendation.
More details (optional, helps us flag when to size up)

This tool gives an estimate based on typical conditions. It is not a professional heating and cooling load calculation. Extreme climates, high ceilings, large windows, or heat-producing equipment may call for a larger system. Questions? Email info@a1homeessentials.com.

How We Determine The Right System Size

  • Square Footage

    Room size is the primary factor when determining BTU requirements.

  • Insulation

    Poor insulation increases heating and cooling demands.

  • Room Use

    Room occupancy, equipment heat output, and usage patterns can all impact the system size required.

Why Homeowners Are Switching To Heat Pumps

One system. Year-round comfort. Lower energy costs.

❄️ + ☀️

Heating & Cooling

Enjoy year-round comfort from a single system.

⚡

Energy Efficient

High-efficiency operation designed to reduce energy use.

💰

Lower Operating Costs

Help reduce ongoing heating and cooling expenses.

📱

Smart Control

Manage settings from virtually anywhere.

Why Choose MRCOOL DIY®?

See how a DIY-designed system compares with a typical professionally installed mini split.

Feature MRCOOL DIY® Typical pro-installed mini split
Designed for homeowner installation✓✕
Refrigerant line setPre-charged Quick Connect®Cut, flare, vacuum and charge on site
Vacuum pump & manifold gaugesNot requiredRequired
HVAC certification for refrigerant workNot requiredTypically required
HVAC contractor laborAvoidedAdded to project cost
Electrical hookupDedicated circuit — electrician may be neededDedicated circuit — electrician may be needed
Smart app control✓Varies

Electrical work and permit rules vary by location. See the FAQ above and confirm local requirements before installing.