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MRCOOL DIY 18K Mini Split Heat Pump vs Cooper & Hunter MIA 18,000 BTU Mini Split

The MRCOOL DIY is the easier install and the better cold-climate heater, with a higher SEER2 rating and a quick-connect line set that skips vacuuming. The Cooper & Hunter MIA is the stronger value on raw capacity, with 18,000 BTU cooling and 18,800 BTU heating versus the MRCOOL's 9,000 BTU figures, plus a wider operating range on paper. Reviewers of DIY kits like MRCOOL praise the no-HVAC-tech setup and the lifetime compressor warranty; Cooper & Hunter owners tend to cite solid build and quiet indoor operation, but the 5°F heating cutoff limits it in cold winters.

  • Choose the MRCOOL DIY if you want to install it yourself without special tools and need heat down to -13°F.
  • Choose the Cooper & Hunter MIA if you want more rated capacity for a larger room and a standard pro install is fine.

Prices

  • MRCOOL DIY 18K Mini Split Heat Pump: $2,259.00 at Tend Industrial Supplies (last seen Nov 2)
  • Cooper & Hunter MIA 18,000 BTU Mini Split: $597.99 at eBay (checked today)
  • Difference: the Cooper & Hunter MIA 18,000 BTU Mini Split is $1,661.01 cheaper than the MRCOOL DIY 18K Mini Split Heat Pump at the latest prices (Nov 2 and Nov 9)
MRCOOL
MRCOOL DIY 18K BTU 22.5 SEER2 5th Gen Ductless Mini Split Heat Pump System - 230V

MRCOOL DIY 18K Mini Split Heat Pump

MRCOOL DIY 18K BTU 22.5 SEER2 5th Gen Ductless Mini Split Heat Pump System - 230V

4.5(6 ratings)
$2,259.00at Tend Industrial SuppliesObserved Nov 2, 2026, 7:45 AM
See all prices and details
Visit Tend Industrial Supplies
Pros
  • Self-install quick-connect line set, no vacuum pump needed
  • High SEER2 efficiency
  • Heats in outdoor temperatures down to -13°F
  • Gold Fin condenser coating resists coastal corrosion
  • Voice control through Alexa and Google Assistant
Cons
  • Listed capacity figures (9,000 BTU) look low for the 18K nameplate
  • Hardwired 230V install still needs an electrician for the circuit
  • No auxiliary heat strip included
Cooper & Hunter
Cooper & Hunter MIA 18,000 BTU 230V

Cooper & Hunter MIA 18,000 BTU Mini Split

Cooper & Hunter MIA 18,000 BTU 230V

4.8(5 ratings)
$597.99at eBayVerified
See all prices and details
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Store links may earn us a commission.

Pros
  • 18,000 BTU cooling and 18,800 BTU heating
  • Wide inverter modulation range, 4,100–19,000 BTU cooling
  • Quiet indoor unit, from 18.5 dB on low
  • Wi-Fi kit and installation line set options included
  • Toshiba-GMCC inverter compressor
Cons
  • Heating stops at 5°F outdoor, so it needs backup in hard freezes
  • Lower SEER2 than the MRCOOL
  • Standard flare fittings mean a pro install and vacuuming

What separates them

MRCOOL DIY 18K Mini Split Heat PumpCooper & Hunter MIA 18,000 BTU Mini Split
Rated cooling capacity9,000 BTU listed18,000 BTU
Rated heating capacity9,000 BTU listed18,800 BTU
Efficiency (SEER2)22.5–23.6 SEER219.2 SEER2
Cold-weather heatingHeats down to -13°F outdoorHeats down to 5°F outdoor
InstallationDIY QuickConnect pre-charged line set, no vacuuming, DIYPRO cableStandard flare connections, pro install typical
Voltage230V hardwired (listing also cites 115V)208/230V, 15A MCA, 20A max fuse
ControlRemote, SmartHVAC app, Alexa and Google voiceIR remote plus Wi-Fi Smart Kit and app
WarrantyLimited lifetime compressor warranty7-year compressor warranty

Price history

$2,309.00$1,055.04
Nov 2Nov 9
  • MRCOOL DIY 18K Mini Split Heat Pump: lowest $2,259.00 on Nov 2 at Tend Industrial Supplies; $2,309.00 on Nov 9.
  • Cooper & Hunter MIA 18,000 BTU Mini Split: lowest $1,055.04 on Nov 6 at MiniSplitsforLess.

Prices at every store

MRCOOL DIY 18K Mini Split Heat Pump

  • Renewable OutdoorsNew

    In stockReturn policy

    $2,609.00Observed at 4:26 AM
    Visit Renewable Outdoors
  • Commercial Cleaning DepotNew

    In stockReturn policy

    $2,609.00Observed at 4:26 AM
    Visit Commercial Cleaning Depot
  • Tend Industrial SuppliesNew

    Availability unknown

    $2,259.00Observed Nov 2, 2026, 7:45 AM
    Visit Tend Industrial Supplies
  • The Home DepotNew

    Availability unknown

    $2,309.00Observed at 4:27 AM
    Visit The Home Depot
All 13 stores and price history →

Cooper & Hunter MIA 18,000 BTU Mini Split

  • eBayNew

    Availability unknownSold by fosdramama (99.5% positive, 1,700 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $597.99Free shippingVerified
    Visit eBay
  • MiniSplitsforLessNew

    Availability unknown

    $1,055.04Observed Nov 6, 2026, 5:25 AM
    Visit MiniSplitsforLess
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $1,099.97Observed Nov 6, 2026, 5:25 AM
    Visit Amazon
  • Snook & Aderton HVAC SupplyNew

    Availability unknown

    $1,272.31Observed Nov 6, 2026, 5:25 AM
    Visit Snook & Aderton HVAC Supply

Store links may earn us a commission.

All 4 stores and price history →

Specs compared

SpecMRCOOL DIY 18K Mini Split Heat PumpCooper & Hunter MIA 18,000 BTU Mini Split
SEER Rating23.6 (SEER2)19.2
Cooling Capacity9000 BTU18000
Heating Capacity9000 BTU18,800 (6,200~20,200) BTU/h
Voltage115-Volt230V
Energy Star CertifiedYes—
Energy ConsumptionRoughly 8 –9 amps at a typical cooling load—
Depth7.44 in (Air handler)—
Height21.85 in (Condenser)—
Width31.57 in (Air handler)—
Weight65.5 lb (Condenser)—
Installation LocationWall Mount—
Installation TypeMini-split—
Show all 40 specsShow fewer specs
SpecMRCOOL DIY 18K Mini Split Heat PumpCooper & Hunter MIA 18,000 BTU Mini Split
Installation RequirementsHardwired—
Cooling Temperature RangeAs high as 122 0F—
Cooling TechnologyInverter, DC Inverter Technology—
DehumidificationYes—
Heating Temperature RangeMinimum outdoor temperature: -13 F—
Heating TypeHeat pump—
Supplemental HeatingNo (auxiliary heater included)—
Airflow4-way (Air direction/circulation)—
Noise Level54 dBA

What reviewers say

Cooper & Hunter MIA 18,000 BTU Mini Split

Owner feedback on the MIA series centers on quiet indoor operation and steady inverter output, with installers noting the precharged line set simplifies setup. Complaints tend to involve the electrical requirements and the cost of professional installation rather than the unit itself.

What people mention
  • NoisePraisedOwners say the indoor unit is barely audible on its lowest fan setting.
  • EfficiencyPraisedThe 19.2 SEER2 rating and inverter compressor are cited as reasons for low running costs.
  • InstallationMixedThe precharged 25 ft line helps, but buyers note a licensed installer and 230V circuit are still required.
  • HeatingMixedHeating works well in mild cold but output tapers as outdoor temperatures approach 5°F.

Questions and answers

Which is better for a cold climate?
The MRCOOL DIY. It is rated to heat with outdoor temperatures down to -13°F, while the Cooper & Hunter MIA stops at 5°F. Below that, the Cooper & Hunter needs another heat source.
Can I install either one myself?
Only the MRCOOL DIY is built for it. Its pre-charged QuickConnect line set removes vacuuming, and the DIYPRO cable removes conduit. The Cooper & Hunter uses standard flare connections and normally needs an HVAC tech.
Which cools a bigger room?
The Cooper & Hunter MIA, on rated capacity. It lists 18,000 BTU cooling and about 1,000 sq ft, while the MRCOOL listing shows 9,000 BTU and about 750 sq ft.
Which is more efficient?
The MRCOOL DIY, at 22.5–23.6 SEER2 versus 19.2 SEER2 for the Cooper & Hunter. The gap is largest in mild weather, where inverter systems run at low output.
Which lasts longer?
The MRCOOL carries a limited lifetime compressor warranty; the Cooper & Hunter covers the compressor for 7 years. Both use R-454B refrigerant and inverter compressors, so real lifespan depends on install quality and maintenance.
Is the Cooper & Hunter worth stepping up to?
If you need more capacity for a large room and have a pro installer, yes. If you want a DIY install or live where winters drop below 5°F, the MRCOOL is the better fit.

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More comparisons

  • MRCOOL DIY 18K BTU 22.5 SEER2 5th Gen Ductless Mini Split Heat Pump System - 230V vs MRCOOL DIY 18K Hyper Heat Mini Split System – 5th Gen, -22°F Heating, 21.2 SEER2, Pre-Charged DIY Line Set
  • MRCOOL DIY 18K BTU 22.5 SEER2 5th Gen Ductless Mini Split Heat Pump System - 230V vs MRCOOL DIY 5th Gen 18000 BTU 230V Ductless Mini Split Heat Pump AC
  • MRCOOL DIY 18K BTU 22.5 SEER2 5th Gen Ductless Mini Split Heat Pump System - 230V vs Senville Elite Series 18,000 Btu Mini Split Air Conditioner & Heat Pump, 25.6 SEER2, Ductless Inverter System

Buying guides that pick them

  • Best 18,000 BTU DIY mini split air conditioners
—
Control TypeRemote, App control—
Air FiltrationReusable filter—
Power ConsumptionNot Measured (wattage)—
WiFi Enabled—Included
Zone Configuration—Single Zone
System Type—Wall Mount
Refrigerant—R454B
Indoor Unit Model—CH-RLS18MIA-230VI
Indoor Unit — Net/Gross Weight—24.47/32.63 lb
Indoor Unit — Power Supply—208-230V, 1Ph, 60Hz
Indoor Unit — Dehumidification—5.29 pt/h
Indoor Unit — Controller—remote controller
Outdoor Unit Model—CH-RLS18MIA-230VO
Outdoor Unit — Net/Gross Weight—72.31/78.48 lb
Outdoor Unit — Power Supply—208-230V, 1Ph, 60Hz
Outdoor Unit — Noise Level—56 dB
Outdoor Unit — Airflow—1,235.3 CFM
Outdoor Unit — Dehumidification—5.29 pt/h
Cooling Capacity Range—18,000 (4,100~19,000) BTU/h