SplitAtlas

Cooper & Hunter / MIA Series

Cooper Hunter MIA 12k 115V Mini-Split

Certified capacity
12,000 BTU/h[4]
SEER2
21.2 SEER2[4]
Heating floor
5 F[5]
Voltage
115 V[1]
Install path
Professional install

The MIA is Cooper & Hunter's budget line, and this 12,000 BTU 115V unit is the one to reach for when price is the deciding factor. It runs on a standard-voltage circuit so the wiring is a simple retrofit, and it is widely stocked and inexpensive.

What you trade for that low price is efficiency and cold-weather heat: its SEER2 of 21.2 and HSPF2 of 8.7 sit in the lower half of our published 12k class, so it costs more to run over the years, and Cooper & Hunter does not publish its low-temperature heating output - so do not lean on it as a primary heat source in a real winter. It is a sensible pick for a mild-climate bedroom or office where the upfront number matters most.

1 zoneProfessional installCurrent

Refrigerant generation

R-454B - current-generation refrigerant

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Error Codes
Cooper & Hunter MIA 12k mini-split indoor wall unit

Image: Cooper & Hunter

Data completeness: 90%
Last sourced
Aug 29, 2026

SplitAtlas score

7.4 / 10

Methodology
Cooling efficiencyBelow average

(21.2 SEER2) among 12k systems

Heating efficiencyBottom quartile

(8.7 HSPF2) among 12k systems

Cold-weather performanceBottom quartile

(5 F heating floor) among 12k systems

NoiseBelow average

(25 dBA indoor min / 54 dBA outdoor) among 12k systems

WarrantyBelow average

(5 yr parts / 7 yr compressor) across the catalogue

Documentation & partsTop quartile

(3 manuals; spec sheet; parts channel) across the catalogue

Not evaluated

  • Installation accessibility — not applicable (professional install)N/A

    professional install - DIY-accessibility not applicable

  • Price-to-value — not evaluatedN/A

    This is a professionally installed, quote-only system, so we can't score its price. Get an installed quote to compare real cost.

    Get a quote

Key ratings

Rated cooling

12,000BTU/h[4]

Rated heating

12,000BTU/h[4]

Buyer review snapshot

Install difficulty

Professional flared-line install
  • Electrical: 115V; MCA 19 A; breaker/fuse 20 A.
  • Line set: Flared line connections; precharged 25 ft.

Alternatives

Availability and price context

This system is sold through dealers, so its price comes as an installed quote that depends on your home. Get installation quotes to price it.

Source date

Model data sourced
Aug 29, 2026
Page reviewed
Jul 19, 2026
Source-backed records
7
Newest source retrieved
Sep 11, 2026

Warranty tiers

Registered
5 yr parts / 7 yr compressor - standard registration/installation terms

The score uses Registered. Additional published terms are shown for reference and not counted in the score.

Review methodology

Strengths

  • Runs on a standard 115V circuit - a simple retrofit with no panel work.
  • A published 25 dB(A) low fan setting is genuinely quiet, fine for a bedroom.
  • Cooper & Hunter's budget line.

Weaknesses

  • Efficiency (SEER2 21.2 / HSPF2 8.7) sits in the lower half of our published 12k class, and that operating-cost gap compounds over years of daily use versus a unit like the AURA.
  • Low-temperature heating output is not published - not a unit to rely on for cold-climate heat.
  • Documentation is thinner than MRCOOL or Senville; several specs read "not published" because the manufacturer does not release them.

Climate suitability

Minimum heating ambient
5 F[5]
Certified heating at 5F
not published
Rated heating at 17F
not published
Rated heating at 47F
not published

Specifications

Show
Manufacturer
Cooper & Hunter
Brand
Cooper & Hunter
Product line
MIA Series
Model number
CH-RLS12MIA-115VI indoor / CH-RLS12MIA-115VO outdoor
Indoor unit model
CH-RLS12MIA-115VI
Outdoor unit model
CH-RLS12MIA-115VO
Number of zones
1
Max indoor units
not published
Rated cooling capacity
12,000 BTU/h[4]
Rated heating capacity
12,000 BTU/h[4]
Voltage
115 V[1]
MCA
19 A[1]
Maximum fuse or breaker size
20 A[1]
Breaker needed
not published
SEER2
21.2 SEER2[4]
EER2
10.1 EER2[4]
HSPF2 (Region 4)
8.7 HSPF2[4]
HSPF2 (Region 5)
6.7 HSPF2[1]
COP
not published
COP at 47F
not published
COP at 5F
not published
Minimum outdoor heating temperature
5 F[5]
Minimum outdoor cooling temperature
5 F[5]
Maximum outdoor temperature
122 F[3]
Indoor noise range
40.5/32.5/25 dB(A)[1]
Outdoor noise rating
54 dBA[1]
Indoor weight
19.4 lb[1]
Outdoor weight
61.29 lb[1]
Refrigerant
R-454B[1]
Refrigerant charge
24.34 oz[3]
Manufacturer coverage
not published
Line-set size
1/4 in liquid / 3/8 in suction
Included line-set length
not published
Maximum line-set length
not published
Max line set per indoor
not published
Maximum elevation difference
not published
Max height between indoor units
not published
Wi-Fi support
not published
Energy Star status
Not published[3]
AHRI certification number
216623803[4]
Warranty
Registered: 5 yr parts / 7 yr compressor (standard registration/installation terms). Score uses Registered.. 7-year compressor and 5-year parts warranty, registration required.
Install path
Professional install
Retail price
Installed quote only
Available retailers
not published
Manual links
AHRI Certificate of Product Ratings ref 216623803, User_manual MIA(R454B), CH-RLS12MIA submittal data sheet
Specification sheet
CH-RLS12MIA submittal data sheet
Last sourced date
Aug 29, 2026

Parts and filters

Fits Cooper & Hunter MIA 12,000 BTU (115V). Part numbers and fit notes identify compatibility only; no manufacturer endorsement is implied.

filter-washable

Indoor washable air filter

Fits
Cooper & Hunter MIA 12,000 BTU (115V)
Filter care
Washable. Wash it with warm, soapy water every 2 weeks; rinse it, dry it out of direct sunlight, and slide it back in. Cooper & Hunter does not publish a replacement interval or condition for this washable filter.
Fit note
Fits CH-RLS12MIA-115VI / CH-RLS12MIA-115VO. Washable main air filter; Cooper & Hunter's MIA owner's manual lists no part number for it.
Source
Cooper & Hunter MIA R454B User Manual, Cleaning Your Indoor Unit, Air Filter, page p. 22 (Make sure to clean the filter every two weeks.)

filter-optional

Air-freshening filter (some units)

Fits
Cooper & Hunter MIA 12,000 BTU (115V)
Filter care
Reusable. Unclip it from the main filter and clean it with a vacuum cleaner. Cooper & Hunter says to clean it along with the main filter. Cooper & Hunter does not publish a replacement interval or condition for this washable filter.
Fit note
Some MIA indoor units have a small clip-on air-freshening filter on the back of the main filter; unclip it and clean it with a vacuum cleaner. Cooper & Hunter lists no part number for it.
Source
Cooper & Hunter MIA R454B User Manual, Parts, page p. 17 (Functional Filter (On Back of Main Filter-Some Units))

remote-control

Wireless remote control

Fits
Cooper & Hunter MIA 12,000 BTU (115V)
Fit note
Fits CH-RLS12MIA-115VI / CH-RLS12MIA-115VO. The sourced Cooper & Hunter manual documents wireless and wired remote-control types but does not publish an orderable remote part number for this indoor SKU; source by indoor model and serial through Cooper & Hunter or Heat & Cool parts support.
Source
Cooper & Hunter Multi R Installation Manual, Optional accessories, page p. 22 (There are two types of remote controls: wired and wireless.)

line-set-installation-kit

Connecting pipe assembly size - 1/4 x 3/8

Fits
Cooper & Hunter MIA 12,000 BTU (115V)
Fit note
Fits CH-RLS12MIA-115VI / CH-RLS12MIA-115VO by the 1/4 x 3/8 liquid/gas dimensions in the Cooper & Hunter accessory table. No offer is attached because the prior Cooper & Hunter retailer pass verified zero exact priced offers, and Heat & Cool monetization is still pending.
Source
Cooper & Hunter Multi R Installation Manual, Installation accessories, page p. 22 (6K/9K/12K Connecting pipe assembly Liquid Side Φ1/4in(Φ6.35) Gas Side Φ3/8in(Φ9.52))
Find this model's filterReplacement Parts & Filters

Electrical requirements

Show
Voltage
115 V[1]
Voltage range
not published
Phase
1[1]
Frequency
60 Hz[1]
MCA
19 A[1]
Breaker needed
not published
Maximum breaker size
not published
Maximum fuse size
20 A[1]
Maximum cooling current
not published
Maximum heating current
not published
Manufacturer wire notes
not published

Installation considerations

Show
Liquid line
1/4 in[1]
Suction line
3/8 in[1]
Line connection type
Flared line connections[2]
Precharged length
25 ft[2]
Included line-set length
not published
Maximum line-set length
not published
Max line set per indoor
not published
Max height between indoor units
not published
Indoor dimensions
31.57 x 7.44 x 11.69 in[1]
Outdoor dimensions
30.12 x 11.93 x 21.85 in[1]
Indoor weight
19.4 lb[1]
Outdoor weight
61.29 lb[1]
Drain size
not published

Comparable models

Cooper & Hunter MIA vs Senville AURA (12,000 BTU) - Budget vs Premium

Side-by-side comparison

Gree Vireo vs Cooper & Hunter MIA (12,000 BTU)

Side-by-side comparison

MRCOOL DIY vs Cooper & Hunter (12,000 BTU)

Side-by-side comparison

Related systems and guides

Frequently asked questions

Can I install the Cooper & Hunter MIA 12,000 BTU (115V) myself, or do I need a pro?
Cooper & Hunter MIA 12,000 BTU (115V) is built for professional installation: the line set must be flared, evacuated, and charged, which requires EPA-certified refrigerant handling. Installing it outside the manufacturer's requirements can void the warranty, so budget for a qualified HVAC installer.
Will the Cooper & Hunter MIA 12,000 BTU (115V) keep heating in a cold winter?
Rated heating operation extends down to 5 F. Certified heating efficiency is 8.7 HSPF2. Match that published heating floor against your climate's design temperature - below the low-ambient rating, output can fall off or the system can pause to protect itself.
What electrical circuit does the Cooper & Hunter MIA 12,000 BTU (115V) need?
Published electrical requirements: 115 V voltage, 19 A minimum circuit ampacity, and 20 A maximum breaker or fuse sizing. Confirm the final circuit against the unit nameplate and local code with a licensed electrician.
What warranty does the Cooper & Hunter MIA 12,000 BTU (115V) carry?
The manufacturer publishes these warranty tiers: Registered: 5 yr parts / 7 yr compressor (standard registration/installation terms). Score uses Registered.. Registration requirements and proof of qualified installation commonly affect coverage, so read the warranty terms before install day.

Data sources

Show
  1. Cooper & Hunter: CH-RLS12MIA-115VO + CH-RLS12MIA-115VI submittal data sheetSourced - manufacturer technical document

    Covers Frequency, Maximum fuse size, Minimum circuit ampacity, Phase, Voltage, Indoor dimensions and more

  2. Cooper & Hunter: Flared refrigerant piping installation evidenceSourced - manufacturer technical document

    Covers Line connection type, Precharged length

  3. Cooper & Hunter: MIA Series brochure (parsed 2026-07-18)Sourced - manufacturer technical document

    Covers Refrigerant charge, Energy Star status, Maximum outdoor temperature

  4. AHRI: AHRI Certificate of Product Ratings ref 216623803 (2025-06-20)Sourced - AHRI certificate

    Covers AHRI certification number, Rated cooling capacity, EER2, Rated heating capacity, HSPF2 (Region 4), SEER2

  5. Cooper & Hunter: CH-RLS12MIA-115VO + CH-RLS12MIA-115VI submittal data sheetSourced - manufacturer technical document

    Covers Minimum outdoor cooling temperature, Minimum outdoor heating temperature

  6. MiniSplitWarehouse: minisplitwarehouse.com MIA 12k 115vSourced - retailer listing

    Covers Retail price, Legacy compressor warranty value, Legacy warranty value, Registered compressor warranty, Registered warranty conditions, Registered parts warranty and more

  7. Cooper & Hunter: Flared refrigerant piping installation evidenceSourced - manufacturer technical document

    Covers system.diy_status, system.installation_type, system.sales_intent

Last updated

Jul 19, 2026