21 SEER Multi zone

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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
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 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...
Free Shipping
$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...
Free Shipping
$4,706.00
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!...
Free Shipping
$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!...
Free Shipping
$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!...
Free Shipping
$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...
Free Shipping
$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!...
Free Shipping
$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...
Free Shipping
$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...
Free Shipping
$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...
Free Shipping
$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...
Free Shipping
$4,438.00 $4,127.34
R410A
White multi-zone ductless mini split AC by Cooper & Hunter quad zone multi system
Cooper & Hunter

4 Zone 48,000 BTU OLIVIA Ductless Mini Split AC Wall Mounted 9k+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...
Free Shipping
$5,208.00
R410A
Multi-zone ductless mini split by Cooper & Hunter, quad zone multi AC unit on wall
Cooper & Hunter

4 Zone 48,000 BTU OLIVIA Ductless Mini Split AC Wall Mounted 9k+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 Here...
Free Shipping
$5,185.00
R410A
White ductless mini split air conditioner from Cooper & Hunter, quad zone multi system
Cooper & Hunter

4 Zone 48,000 BTU OLIVIA Ductless Mini Split AC Wall Mounted 9k+9k+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 Here...
Free Shipping
$5,084.00
7% OFF
R454B
White multi-zone mini split AC from minisplits4less with 25ft installation, parts of OLMO series
OLMO

5 Zone 42,000 BTU OLMO series Ductless Mini Split AC Wall Mounted 9k+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
$4,938.00 $4,592.34
7% OFF
R454B
White multi-zone mini split air conditioning system for 25ft C&H installation
OLMO

5 Zone 42,000 BTU OLMO Series Ductless Mini Split AC Wall Mounted 9k+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
$5,030.00 $4,677.90
7% OFF
R454B
White multi-zone mini split AC with 25ft installation for efficient cooling in C&H homes
OLMO

5 Zone 42,000 BTU OLMO Series Ductless Mini Split AC Wall Mounted 9k+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...
Free Shipping
$4,923.00 $4,578.39
R410A
Multi-zone mini-split AC from cooper & hunter Sophia series for versatile cooling
Cooper & Hunter

5 Zone 48,000 BTU OLIVIA Ductless Mini Split AC Wall Mounted 9k+9k+12k+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. TO CUSTOMIZE, SEND US A MESSAGE OR GIVE...
Free Shipping
$5,524.00
R410A
Multi-zone mini-split AC from Cooper & Hunter Sophia Series by minisplits4less
Cooper & Hunter

5 Zone 48,000 BTU OLIVIA Ductless Mini Split AC Wall Mounted 9k+9k+9k+9k+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...
Free Shipping
$5,506.00
7% OFF
R454B
White multi-zone air conditioning system for OLMO 36,000 BTU Tri Zone mini split installation kits
OLMO

OLMO 42,000 BTU Tri Zone 12000 + 12000 + 18000 BTU Wall Mount Ductless Mini Split A/C and Heater with 25ft Installation Kits

  *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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$4,075.00 $3,789.75
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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 (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’s determined by dividing total seasonal cooling output by total electrical energy input. A higher SEER value means greater efficiency, lower energy bills, and reduced environmental impact. Modern ductless systems often exceed basic efficiency standards, offering substantial long-term energy savings.

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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 cut 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 need ultra-quiet performance and smart control, a 21 SEER unit offers excellent long-term value and comfort.

Are 21 SEER systems eligible for rebates?

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