SplitAtlas

Cooper & Hunter / MIA Series

Cooper Hunter MIA 9k R-454B 115V Mini-Split

Certified capacity
9,000 BTU/h[3]
SEER2
21.5 SEER2[3]
Heating floor
-13 F[1]
Voltage
115 V[1]
Install path
Professional install

The 9k MIA is the 115V small-room budget pick, and on paper it is identical to the MIA 6k 115V - same 21.5 SEER2, same 10,000 BTU at 47F easing to 6,500 at 5F. The only real difference is the nominal size label and the price, so pick whichever is cheaper for your room.

Running on a standard household circuit makes it a simple, low-cost retrofit for a small mild-climate space - just do not expect it to carry the heat load on the coldest nights.

1 zoneProfessional installCurrent

Refrigerant generation

R-454B - current-generation refrigerant

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Error Codes
Cooper & Hunter MIA 9,000 BTU R-454B 115V (CH-RLS09MIA-115VI / CH-RLS09MIA-115VO) mini-split heat pump outdoor condenser

Image: Cooper & Hunter

Data completeness: 100%
Last sourced
Aug 29, 2026

SplitAtlas score

7.5 / 10

Methodology
Cooling efficiencyBelow average

(21.5 SEER2) among <=9k systems

Heating efficiencyBottom quartile

(9.0 HSPF2) among <=9k systems

Cold-weather performanceBottom quartile

(65% heat retained at 5F; -13 F heating floor) among <=9k systems

NoiseBottom quartile

(25 dBA indoor min / 54 dBA outdoor) among <=9k systems

WarrantyBelow average

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

Feature setAbove average

(5 verified features) across the catalogue

Documentation & partsTop quartile

(5 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

9,000BTU/h[3]

Rated heating

10,000BTU/h[3]

Buyer review snapshot

Install difficulty

Professional flared-line install
  • Electrical: 115V; MCA 12 A; breaker/fuse 15 A.
  • Line set: Flared line connections; precharged 25 ft; max 82 ft.

Alternatives

Availability and price context

We could not verify a current retail price for this model. We could not find this exact model in stock at a retailer we work with when we last checked on 2026-08-29.

Source date

Model data sourced
Aug 29, 2026
Page reviewed
Jul 24, 2026
Source-backed records
6
Newest source retrieved
Aug 29, 2026

Warranty tiers

Warranty: 5 years parts and 7 years compressor as standard.

Review methodology

Strengths

  • Plugs into a standard 115V circuit for a simple retrofit.
  • 10,000 BTU of heat at 47F, ENERGY STAR certified, on R-454B refrigerant.
  • Efficient for the budget class at 21.5 SEER2.

Weaknesses

  • A 9 HSPF2 and 6,500 BTU at 5F limit cold-climate heating.
  • Shares exact ratings with the MIA 6k 115V; 115V startup current wants a dedicated circuit.

Climate suitability

Minimum heating ambient
-13 F[1]
Rated heating at 5F
6,500 BTU/h[3]
Rated heating at 17F
8,000 BTU/h[3]
Rated heating at 47F
10,000 BTU/h[3]

Specifications

Show
Manufacturer
Cooper & Hunter
Brand
Cooper & Hunter
Product line
MIA Series
Model number
CH-RLS09MIA-115VI indoor / CH-RLS09MIA-115VO outdoor
Indoor unit model
CH-RLS09MIA-115VI
Outdoor unit model
CH-RLS09MIA-115VO
Number of zones
1
Max indoor units
not published
Rated cooling capacity
9,000 BTU/h[3]
Rated heating capacity
10,000 BTU/h[3]
Voltage
115 V[1]
MCA
12 A[1]
Maximum fuse or breaker size
15 A[1]
Breaker needed
not published
SEER2
21.5 SEER2[3]
EER2
12.5 EER2[3]
HSPF2 (Region 4)
9 HSPF2[3]
HSPF2 (Region 5)
not published
COP
not published
COP at 47F
not published
COP at 5F
1.96 COP[3]
Minimum outdoor heating temperature
-13 F[1]
Minimum outdoor cooling temperature
-13 F[1]
Maximum outdoor temperature
122 F[1]
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[3]
Refrigerant charge
not published
Manufacturer coverage
not published
Line-set size
1/4 in liquid / 3/8 in suction
Included line-set length
Cooper&Hunter online kits can be sold with different line-set/accessory bundles; the AHRI-certified indoor/outdoor pair has no single included line-set length.
Maximum line-set length
82 ft[1]
Max line set per indoor
not published
Maximum elevation difference
49.2 ft[1]
Max height between indoor units
not published
Wi-Fi support
supported[1]
Energy Star status
ENERGY STAR certified[4]
AHRI certification number
216623802[3]
Warranty
Standard: 5 yr parts / 7 yr compressor (standard registration/installation terms). 5-year parts / 7-year compressor limited warranty with registration requirements.
Install path
Professional install
Retail price
We could not find this exact model in stock at a retailer we work with when we last checked on 2026-08-29.
Available retailers
not published
Manual links
AHRI public directory record 216623802, ENERGY STAR exact check 216623802, User_manual MIA(R454B), Cooper&Hunter CH-RLS09MIA-115VO official product page, Cooper&Hunter CH-RLS09MIA-115VO + CH-RLS09MIA-115VI support-material submittal/spec table
Specification sheet
Cooper&Hunter CH-RLS09MIA-115VO + CH-RLS09MIA-115VI support-material submittal/spec table
Last sourced date
Aug 29, 2026

Parts and filters

Fits Cooper & Hunter MIA 9,000 BTU R-454B 115V (CH-RLS09MIA-115VI / CH-RLS09MIA-115VO). Part numbers and fit notes identify compatibility only; no manufacturer endorsement is implied.

filter-washable

Indoor washable air filter

Fits
Cooper & Hunter MIA 9,000 BTU R-454B 115V (CH-RLS09MIA-115VI / CH-RLS09MIA-115VO)
Fit note
Fits CH-RLS09MIA-115VI / CH-RLS09MIA-115VO. Cooper & Hunter documents the indoor air-filter location but does not publish an orderable filter part number in the sourced manual; source by indoor model and serial through Cooper & Hunter or Heat & Cool parts support.
Source
Cooper & Hunter Multi R Installation Manual, Indoor unit overview, page p. 19 (Air purifying filter & Air filter(behind))

remote-control

Wireless remote control

Fits
Cooper & Hunter MIA 9,000 BTU R-454B 115V (CH-RLS09MIA-115VI / CH-RLS09MIA-115VO)
Fit note
Fits CH-RLS09MIA-115VI / CH-RLS09MIA-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 9,000 BTU R-454B 115V (CH-RLS09MIA-115VI / CH-RLS09MIA-115VO)
Fit note
Fits CH-RLS09MIA-115VI / CH-RLS09MIA-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))
Replacement Parts & Filters

Electrical requirements

Show
Voltage
115 V[1]
Voltage range
115V[1]
Phase
1[1]
Frequency
60 Hz[1]
MCA
12 A[1]
Breaker needed
not published
Maximum breaker size
15 A[1]
Maximum fuse size
15 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
Cooper&Hunter online kits can be sold with different line-set/accessory bundles; the AHRI-certified indoor/outdoor pair has no single included line-set length.
Maximum line-set length
82 ft[1]
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

Related systems and guides

Frequently asked questions

Can I install the Cooper & Hunter MIA 9,000 BTU R-454B 115V (CH-RLS09MIA-115VI / CH-RLS09MIA-115VO) myself, or do I need a pro?
Cooper & Hunter MIA 9,000 BTU R-454B 115V (CH-RLS09MIA-115VI / CH-RLS09MIA-115VO) 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 9,000 BTU R-454B 115V (CH-RLS09MIA-115VI / CH-RLS09MIA-115VO) keep heating in a cold winter?
The manufacturer publishes 6,500 BTU/h of heating output at 5F. Rated heating operation extends down to -13 F. Certified heating efficiency is 9 HSPF2. Match those numbers against your climate's design temperature - in cold regions, output at 5F matters far more than the nameplate capacity measured at 47F.
What electrical circuit does the Cooper & Hunter MIA 9,000 BTU R-454B 115V (CH-RLS09MIA-115VI / CH-RLS09MIA-115VO) need?
Published electrical requirements: 115 V voltage, 12 A minimum circuit ampacity, and 15 A maximum breaker or fuse sizing. Confirm the final circuit against the unit nameplate and local code with a licensed electrician.
How far can the outdoor unit be from the indoor head?
The published maximum line-set length is 82 ft, and the included line set comes pre-charged for 25 ft. Longer runs than the included set allows typically mean added refrigerant and a pro visit, so measure the planned routing before ordering.
What warranty does the Cooper & Hunter MIA 9,000 BTU R-454B 115V (CH-RLS09MIA-115VI / CH-RLS09MIA-115VO) carry?
The manufacturer publishes these warranty tiers: Standard: 5 yr parts / 7 yr compressor (standard registration/installation terms). Registration requirements and proof of qualified installation commonly affect coverage, so read the warranty terms before install day.

Data sources

Show
  1. Cooper & Hunter: Cooper&Hunter CH-RLS09MIA-115VO + CH-RLS09MIA-115VI official product page/support materialsSourced - manufacturer product page

    Covers Frequency, electrical_spec.guaranteed_voltage_range, Maximum breaker size, Maximum fuse size, Minimum circuit ampacity, Phase and more

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

    Covers Line connection type, Precharged length

  3. AHRI certificate #216623802 - search the AHRI DirectorySourced - AHRI directory

    Covers AHRI certification number, Rated cooling capacity, COP at 5F, EER2, Rated heating capacity, HSPF2 (Region 4) and more

  4. ENERGY STAR: ENERGY STAR exact row check for AHRI 215864147Sourced - Energy Star listing

    Covers Energy Star status

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

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

  6. Cooper & Hunter: Cooper&Hunter warranty and official support pagesSourced - manufacturer product page

    Covers Legacy compressor warranty value, Legacy warranty value, Standard compressor warranty, Standard warranty conditions, Standard parts warranty, Warranty notes

Last updated

Jul 24, 2026