A split system air conditioner consists of two main components:

✔ Outdoor Unit (Condenser): Generates cooling (or heating) using refrigerant.
✔ Indoor Unit (Evaporator): Distributes conditioned air into your home or office.

It’s called a “split system” because the two components are separate, working together for efficient temperature control.

Yes! Many modern heat pumps work efficiently even in freezing temperatures. Look for:
✔ Cold-climate heat pumps – Some models operate in temperatures as low as -15°F.
✔ Variable-speed (inverter) compressors – Maintain efficiency in extreme cold.
✔ Low ambient kits – Allow AC to run in freezing temperatures (ideal for server rooms).
✔ Crankcase heaters – Protect the compressor in cold weather.

If you live in a colder region, choose a heat pump rated for extreme cold to ensure reliable heating year-round.

Most condensers come precharged, but adjustments may be necessary:

Precharge Covers a Specific Line Set Length

• Standard charge covers 15-25 feet of refrigerant lines.
• Longer line sets require additional refrigerant.
• Shorter line sets may need some refrigerant removed.

Why Proper Refrigerant Levels Matter

• ⚠ Too little refrigerant → Poor cooling/heating, increased strain on the compressor.
• ⚠ Too much refrigerant → Higher pressure, inefficient operation, potential system damage.
• Correct charge → Ensures peak efficiency and longevity.

What Needs to Be Done?
✔ A licensed HVAC technician should measure and adjust refrigerant levels based on manufacturer specs.
✔ A vacuum pump is used to remove air and moisture before releasing refrigerant.
💡 Even with a precharged system, always verify refrigerant levels with your installer.

Mini-split systems are much quieter than traditional HVAC systems:
✔ Indoor Unit: 19-45 dB (similar to a library).
✔ Outdoor Unit: 45-55 dB (like a quiet conversation).
✔ Inverter Technology: Adjusts speed dynamically, reducing noise.

To minimize noise:

• Install the outdoor unit on a stable, vibration-free surface.
• Use wall brackets with rubber dampers.
• Activate "quiet" or "sleep" mode for near-silent operation.

Unlike traditional ACs that turn on and off repeatedly, inverter compressors adjust speed for:
✔ Higher efficiency – Uses only the power needed, reducing energy waste.
✔ Lower energy costs – Avoids frequent startups that consume extra power.
✔ Quieter operation – No loud cycling, just smooth temperature control.
✔ Longer lifespan – Reduces wear and tear on the system.

Bottom line: More comfort, less energy waste, and a longer-lasting system.

1. Choose the Right Location

• Indoor Unit: Mount high on an interior wall, away from heat sources and direct sunlight.
• Outdoor Unit: Place on a stable surface with sufficient airflow and drainage.

2. Drill the Wall Hole

A small hole (about 2.5"-3") is needed to run:

• Refrigerant lines
• Electrical wiring
• Condensate drain line (angled downward for proper drainage)

3. Connect Refrigerant Lines & Wiring

• Secure the line set between the indoor and outdoor units, minimizing bends.
• Connect electrical wiring based on the unit’s voltage (110V or 220V).

4. Secure & Test the System

✔ Vacuum & Pressure Test: Removes moisture and air.
✔ Leak Check: Ensures sealed connections before releasing refrigerant.
✔ Power On & Test: Confirms proper heating and cooling operation.

5. Professional Installation is Recommended

• Most systems require a licensed HVAC technician for refrigerant handling and system charging.
• DIY models may come pre-charged, allowing for self-installation.
  💡 Tip: Hiring a professional ensures optimal performance and efficiency.

Search for Local Contractors: Look up "HVAC contractor near me" and read reviews on platforms like Google or Yelp, focusing on those with experience in mini-split installations. You can also use the MRCOOL Contractor Locator to find authorized contractors in your area.

Verify Licensing and Certification: Check that the contractor is properly licensed and certified. Ask if they have experience specifically with mini-split systems and relevant certifications like NATE.

Get Multiple Quotes: Request written quotes from several contractors to compare prices and ensure fair pricing. Be wary of unusually low quotes.

Check for Insurance: Confirm that the contractor has liability and workers' compensation insurance to protect you during the installation.

Request a Written Contract: Ensure the contract includes project details, payment terms, and warranties.

Taking these steps, along with using the MRCOOL locator, will help you find a reliable, qualified contractor for your mini-split installation.

General BTU Guidelines (Based on insulation quality):

• 🏠 Well-insulated home → 20 BTUs per sq. ft.
• 🏚️ Average insulation → 25 BTUs per sq. ft.
• 🚪 Poor insulation → 30 BTUs per sq. ft.

Example: A 12,000 BTU unit can cool:
✔ 600 sq. ft. in a well-insulated home
✔ 480 sq. ft. in an average home
✔ 400 sq. ft. in a poorly insulated home

Other Factors That Affect Sizing:

• Climate: Hot climates may require 30% more BTUs for efficient cooling.
• Ceiling Height: Higher ceilings (above 8 feet) require 20% more BTUs.
• Sunlight Exposure: Large south- or west-facing windows increase cooling needs.
• Occupancy: Add 600 BTUs per extra person beyond two occupants.
• Kitchens & Appliances: Add 4,000 BTUs for kitchens.
• Windows & Doors: Older, drafty homes may need a larger unit.

💡 Tip: An undersized unit will struggle to maintain temperature, while an oversized unit may short cycle, reducing efficiency. Consult an HVAC professional for accurate sizing.

We offer free shipping on all orders within the U.S.!

No, we currently only ship within the United States.

We understand the importance of timely delivery and strive to ship all orders as quickly as possible. However, shipping times may vary based on factors like the carrier and delivery distance, so we can't guarantee an exact timeframe for every order.

While shipping speed depends on the carrier’s schedule and your location, we work closely with our shipping partners to ensure your order reaches you as soon as possible.

We appreciate your patience and are committed to delivering your MRCOOL products quickly and efficiently!

MRCOOL does not send field technicians but offers expert in-house support to help you with any troubleshooting or system issues. There team is available via phone or email to assist you with diagnosis, solutions, and product guidance.

Key Points:

• In-House Support: MRCOOL technicians provide over-the-phone or email assistance to resolve your issues.
• Labor Costs: Any technician services you arrange for on-site work are your responsibility.
• Find an Installer: Check the MRCOOL Locations Map for installer recommendations.
• Collaborative Support: If you have an existing technician scheduled, schedule and coordinate with there in-house team for seamless service.

To receive personalized support, reach out to There technical team for further assistance.

At Clearance AC, we’re here to help with all your tech support needs! Whether you have questions about installation, troubleshooting, or selecting the right system for your space, our team is ready to assist you. Don’t hesitate to reach out—we’re just a call or email away. Contact us at 800-961-7123 or email us at sales@clearanceac.com, and we’ll be happy to help!

✔ Returns accepted within 30 days of delivery.
✔ Customer is responsible for return shipping costs.
✔ A 20% restocking fee applies.
✔ Products must be in new condition for a refund.

⚠ Important: Always inspect your order upon delivery! Shipping companies won’t cover damage claims after signing for the package.