21 SEER

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R410A
Air conditioning system of Cooper & Hunter Sophia Series 12,000 BTU concealed duct mini split
Cooper & Hunter

12,000 BTU 230V Ducted Mini Split AC Concealed Duct Heat Pump

Cooper & Hunter Sophia Series: Concealed Duct Mini Split Air Conditioner Experience the perfect balance of comfort and efficiency with the Cooper & Hunter 12,000 BTU 230V 21.5 SEER Concealed...
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$1,331.33
R454B
Cooper & Hunter ductless mini split ceiling cassette air conditioning system
Cooper & Hunter

12,000 BTU 230V Ductless Mini Split AC Ceiling Cassette Heat Pump

Cooper & Hunter 12,000 BTU Ceiling Cassette Mini Split System Experience year-round comfort with the Cooper & Hunter 12,000 BTU Ceiling Cassette Ductless Mini Split Air Conditioner Heat Pump. Designed...
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$1,677.60
20% OFF
R410A
White Mini-Split Air Conditioner for 12,000 BTU Cooper & Hunter Olivia Series Heat Pump
Cooper & Hunter

12,000 BTU 230V Ductless Mini Split AC Wall Mounted Olivia Series Heat Pump

Cooper & Hunter Olivia Series Mini Split AC/Heater Introducing the Cooper & Hunter 12,000 BTU Olivia Series, a top-of-the-line ductless mini split air conditioner and heat pump. Designed for both...
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$1,185.00 $950.95
R32
White ductless mini-split air conditioner wall mounted Olmo Sierra Series heat pump
OLMO

18,000 BTU 230V Ductless Mini Split AC Wall Mounted OLMO Sierra Series Heat Pump

  Click Here to see the OLMO Sierra Series Booklet INCLUDED IN YOUR ORDER: Olmo Single Zone Ductless Mini Split System 18,000 BTU Inverter Heat Pump OUTDOOR UNIT = 18,000...
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$934.40
R454B
Cooper & Hunter dual zone ductless mini split 12k concealed duct AC system
Cooper & Hunter

2 Zone 18,000 BTU Ducted Mini Split AC Concealed Duct 12k+12k

  ALL OF OUR MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. SEND US A MESSAGE OR GIVE US A CALL...
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$3,135.00
15% OFF
R410A
White air conditioning system from 2 Zone 18,000 BTU OLMO Sierra mini split wall mount ductless unit
OLMO

2 Zone 18,000 BTU OLMO Sierra Ductless Mini Split AC Wall Mounted 12k+12k

  *ALL OF OUR OLMO MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 16FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL!...
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$1,758.00 $1,494.30
15% OFF
R410A
White split-system air conditioner with remote, perfect for 2 zone wall mount ductless mini split AC
OLMO

2 Zone 18,000 BTU OLMO Sierra Ductless Mini Split AC Wall Mounted 9k+12k

  *ALL OF OUR OLMO MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 16FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL!...
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$1,752.00 $1,489.20
15% OFF
R410A
White air conditioning system from 2 Zone 18,000 BTU OLMO Sierra mini split wall mount ductless unit
OLMO

2 Zone 18,000 BTU OLMO Sierra Ductless Mini Split AC Wall Mounted 9k+9k

  *ALL OF OUR OLMO MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 16FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL!...
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$1,746.00 $1,484.10
R454B
White ductless mini split ceiling cassette ductless AC from Cooper & Hunter
Cooper & Hunter

24,000 BTU 230V Ductless Mini Split AC Ceiling Cassette Heat Pump

Cooper & Hunter 24,000 BTU Ceiling Cassette Mini Split Air Conditioner Experience ultimate comfort with the Cooper & Hunter Olivia Series 24,000 BTU Ceiling Mini Split Air Conditioner. Designed for...
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$2,260.80
R454B
Black 24,000 BTU Olivia Midnight Edition Mini Split AC with remote and R454B for efficiency
Cooper & Hunter

24,000 BTU 230V Ductless Mini Split AC Wall Mounted Olivia Midnight Edition Heat Pump

This stylish and sleek mirrored wall mounted system is newest addition to the Cooper and Hunter product line. The Olivia Midnight Edition may be exactly what you’ve been searching for,...
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$1,786.68
23% OFF
R410A
White mini-split air conditioner from the Olivia Series by Cooper & Hunter at Minisplits4less
Cooper & Hunter

24,000 BTU 230V Ductless Mini Split AC Wall Mounted Olivia Series Heat Pump

  *INSTALLATION KIT IS OPTIONAL FOR SINGLE ZONE SYSTEMS. WE OFFER 16FT, 25FT, AND 50FT INSTALLATION KITS INCLUDED IN YOUR ORDER:      Cooper & Hunter Single Zone Ductless Mini...
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$2,100.00 $1,613.04
7% OFF
R410A
White multi-zone air conditioning system for OLMO 36,000 BTU Tri Zone mini split installation kits
OLMO

3 Zone 36,000 BTU OLMO Sierra Ductless Mini Split AC Wall Mounted 12k+12k+12k

  *THIS OLMO MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL! INCLUDED IN...
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$3,282.00 $3,052.26
7% OFF
R410A
White multi-zone air conditioning system for OLMO 36,000 BTU Tri Zone mini split installation kits
OLMO

3 Zone 36,000 BTU OLMO Sierra Ductless Mini Split AC Wall Mounted 12k+12k+18k

  *THIS OLMO MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL! INCLUDED IN...
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$3,378.00 $3,141.54
7% OFF
R410A
White multi-zone air conditioning system for OLMO 36,000 BTU Tri Zone mini split installation kits
OLMO

3 Zone 36,000 BTU OLMO Sierra Ductless Mini Split AC Wall Mounted 9k+12k+12k

  *THIS OLMO MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL! INCLUDED IN...
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$3,276.00 $3,046.68
7% OFF
R410A
White multi-zone air conditioning system for OLMO 36,000 BTU Tri Zone mini split installation kits
OLMO

3 Zone 36,000 BTU OLMO Sierra Ductless Mini Split AC Wall Mounted 9k+12k+18k

  *THIS OLMO MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL! INCLUDED IN...
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$3,373.00 $3,136.89
7% OFF
R410A
White multi-zone air conditioning system for OLMO 36,000 BTU Tri Zone mini split installation kits
OLMO

3 Zone 36,000 BTU OLMO Sierra Ductless Mini Split AC Wall Mounted 9k+9k+12k

  *THIS OLMO MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL! INCLUDED IN...
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$3,270.00 $3,041.10
7% OFF
R410A
White multi-zone air conditioning system for OLMO 36,000 BTU Tri Zone mini split installation kits
OLMO

3 Zone 36,000 BTU OLMO Sierra Ductless Mini Split AC Wall Mounted 9k+9k+18k

  *THIS OLMO MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL! INCLUDED IN...
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$3,367.00 $3,131.31
R410A
Multi-zone ductless mini split AC by Cooper & Hunter, wall mount ductless system
Cooper & Hunter

3 Zone 48,000 BTU OLIVIA Ductless Mini Split AC Wall Mounted 12k+12k+24k

*ALL OF OUR MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL! Click Here...
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$4,685.00
R410A
Multi-zone mini-split AC by Cooper & Hunter offering tri zone multi air conditioning
Cooper & Hunter

3 Zone 48,000 BTU OLIVIA Ductless Mini Split AC Wall Mounted 12k+18k+18k

*ALL OF OUR MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL! INCLUDED IN...
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$4,600.00
R410A
Multi-zone ductless mini split AC system by Cooper & Hunter, tri zone cooling setup
Cooper & Hunter

3 Zone 48,000 BTU OLIVIA Ductless Mini Split AC Wall Mounted 18k+18k+18k

  *ALL OF OUR MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL! Click...
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$4,662.00
R410A
Multi-zone ductless mini split AC system by Cooper & Hunter, tri zone multi setup
Cooper & Hunter

3 Zone 48,000 BTU OLIVIA Ductless Mini Split AC Wall Mounted 18k+18k+24k

*ALL OF OUR MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL! Click Here...
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$4,808.00
R410A
Multi-zone ductless mini split AC system by Cooper & Hunter, tri zone multi setup
Cooper & Hunter

3 Zone 48,000 BTU OLIVIA Ductless Mini Split AC Wall Mounted 9k+18k+24k

*ALL OF OUR MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL! Click Here...
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$4,706.00
R410A
Multi-zone Cooper & Hunter C& H Sophia Series mini-split AC for versatile cooling
Cooper & Hunter

3 Zone 48,000 BTU Sophia Series Ductless Mini Split AC Universal Floor/Ceiling 18k+18k+24k

* ALL OF OUR MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, SEND US A MESSAGE OR GIVE...
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$6,086.08
R410A
Multi-zone mini-split AC from Cooper & Hunter C&H Sophia Series by minisplits4less
Cooper & Hunter

3 Zone 55,000 BTU Sophia Series Ductless Mini Split AC Universal Floor/Ceiling 18k+18k+18k

* ALL OF OUR MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, SEND US A MESSAGE OR GIVE...
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$5,904.47
7% OFF
R410A
White multi-zone mini split A/C and heater with 25ft installation kit for C&H comfort
OLMO

4 Zone 36,000 BTU OLMO Sierra Ductless Mini Split AC Wall Mounted 9k+12k+12k+12k

  *ALL OF OUR OLMO MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL!...
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$3,741.00 $3,479.13
7% OFF
R410A
White multi-zone mini split A/C and heater with 25ft installation kit for C&H comfort
OLMO

4 Zone 36,000 BTU OLMO Sierra Ductless Mini Split AC Wall Mounted 9k+9k+12k+12k

  *ALL OF OUR OLMO MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL!...
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$3,735.00 $3,473.55
7% OFF
R410A
White multi-zone mini split A/C and heater with 25ft installation kit for C&H comfort
OLMO

4 Zone 36,000 BTU OLMO Sierra Ductless Mini Split AC Wall Mounted 9k+9k+9k+12k

  *ALL OF OUR OLMO MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL!...
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$3,729.00 $3,467.97
7% OFF
R410A
White multi-zone mini split A/C and heater with 25ft installation kit for C&H comfort
OLMO

4 Zone 36,000 BTU OLMO Sierra Ductless Mini Split AC Wall Mounted 9k+9k+9k+18k

  *THIS OLMO MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL! INCLUDED IN...
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$3,825.00 $3,557.25
7% OFF
R410A
White multi-zone mini split A/C and heater with 25ft installation kit for C&H comfort
OLMO

4 Zone 36,000 BTU OLMO Sierra Ductless Mini Split AC Wall Mounted 9k+9k+9k+9k

  *ALL OF OUR OLMO MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL!...
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$3,723.00 $3,462.39
7% OFF
R454B
White multi-zone air conditioning system from OLMO 42,000 BTU minisplits4less C&H with 25ft installation kit
OLMO

4 Zone 42,000 BTU OLMO Series Ductless Mini Split AC Wall Mounted 12k+12k+12k+12k

  *THIS OLMO MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL! INCLUDED IN...
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$4,468.00 $4,155.24
7% OFF
R454B
White multi-zone mini split A/C and heater with 25ft installation kit for C&H comfort
OLMO

4 Zone 42,000 BTU OLMO Series Ductless Mini Split AC Wall Mounted 12k+12k+12k+18k

  *THIS OLMO MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL! INCLUDED IN...
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$4,567.00 $4,247.31
7% OFF
R454B
White multi-zone mini split A/C and heater with 25ft installation kit for C&H comfort
OLMO

4 Zone 42,000 BTU OLMO Series Ductless Mini Split AC Wall Mounted 9k+12k+12k+18k

  *THIS OLMO MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL! INCLUDED IN...
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$4,560.00 $4,240.80
7% OFF
R454B
White multi-zone mini split A/C and heater with 25ft installation kit for C&H comfort
OLMO

4 Zone 42,000 BTU OLMO Series Ductless Mini Split AC Wall Mounted 9k+9k+12k+12k

  *THIS OLMO MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL! INCLUDED IN...
Free Shipping
$4,453.00 $4,141.29
7% OFF
R454B
White multi-zone mini split A/C and heater with 25ft installation kit for C&H comfort
OLMO

4 Zone 42,000 BTU OLMO Series Ductless Mini Split AC Wall Mounted 9k+9k+9k+18k

  *THIS OLMO MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL! INCLUDED IN...
Free Shipping
$4,545.00 $4,226.85
7% OFF
R454B
White multi-zone mini split A/C and heater with 25ft installation kit for C&H comfort
OLMO

4 Zone 42,000 BTU OLMO Series Ductless Mini Split AC Wall Mounted 9k+9k+9k+24k

  *THIS OLMO MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL! INCLUDED IN...
Free Shipping
$4,682.00 $4,354.26
7% OFF
R454B
White multi-zone mini split A/C and heater with 25ft installation kit for C&H comfort
OLMO

4 Zone 42,000 BTU OLMO Series Ductless Mini Split AC Wall Mounted 9k+9k+9k+9k

  *THIS OLMO MULTI ZONE SYSTEMS COME PRE-BUNDLED WITH A 25FT INSTALLATION KIT FOR EACH ZONE. WE CARRY 16FT, 25FT, AND 50FT. TO CUSTOMIZE, GIVE US A CALL! INCLUDED IN...
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$4,438.00 $4,127.34
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Discover an advanced cooling solution with our collection of 21 SEER ductless mini split air conditioners. Designed for efficiency and comfort, these systems offer superior performance while reducing energy costs. Ideal for both residential and commercial spaces, the 21 SEER rating ensures optimal energy efficiency, making it a cost-effective choice for any setting. Each unit operates quietly, providing a peaceful environment, and features easy installation that eliminates the need for ductwork. With modern technology and sleek designs, these air conditioners provide effective temperature control regardless of outdoor conditions. Enhance your living or workspace with reliable and eco-friendly cooling solutions from the 21 SEER ductless mini split collection.

🤔 What is SEER?

SEER, or Seasonal Energy Efficiency Ratio, is a standardized metric used to evaluate the efficiency of air conditioners, heat pumps, and mini-split systems during the cooling season. It is determined by dividing the total cooling output over a typical season by the total electric energy input. A higher SEER value indicates greater energy efficiency, helping reduce monthly utility costs and minimize environmental impact. Many modern systems surpass basic efficiency requirements, offering enhanced energy savings. When comparing mini-split units, consider the SEER rating to optimize efficiency and maintain comfortable indoor conditions.

🎯 Looking for Great Deals on Mini-Split Systems?

Check out our SALE Collection for top-rated ductless mini-splits, heat pumps, and AC units at discounted prices!

  • ✅ Energy-efficient cooling & heating solutions
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FAQ

Is a 21 SEER mini split system energy efficient?

Absolutely. A 21 SEER system is among the top-performing models for 2025, delivering up to 45% better efficiency than older units. These ductless systems use inverter technology to reduce electricity costs while maintaining steady, quiet comfort all season long.

What are the best 21 SEER ductless air conditioners?

Top picks include the Cooper & Hunter Olivia Midnight 24K BTU (21 SEER, Wi-Fi, Energy Star) and the Olmo Sierra 18K BTU inverter system (ultra-quiet, heat pump ready). Both are available with full install kits at MiniSplits4Less.com.

Who should consider a 21 SEER ductless system?

Ideal for homeowners cooling 700–1,500 sq ft, especially in hot or humid climates. If you use your system daily or need ultra-quiet performance and smart control, a 21 SEER unit offers outstanding long-term value and comfort.

Are 21 SEER systems eligible for rebates?

Yes—many 21 SEER systems are ENERGY STAR® rated and AHRI-certified, which qualifies them for 2025 utility rebates in most states. We include AHRI numbers on eligible kits at MiniSplits4Less.com to make the rebate process easier.