SplitAtlas

Klimaire / KMHR Hyper Heat Series

Klimaire KMHR Hyper Heat 26k HZ R-454B 208/230V 4-Zone Mini-Split

Certified capacity
27,000 BTU/h[2]
SEER2
21 SEER2[2]
Heating floor
-22 F[1]
Voltage
230 V[1]
Install path
Professional install

The Klimaire KMHR Hyper Heat Series 4-Zone 26k drives four heads from one 208/230V outdoor unit at a certified nominal SEER2 21, EER2 12, HSPF2 10 on current R-454B refrigerant. From the Hyper Heat line, its rated heating actually rises in the cold: 27,000 BTU at 47F climbing to 29,000 BTU at 17F and holding 27,000 BTU at 5F.

That is genuine low-temperature heating, heat that rises as the outdoor temperature falls, though the system is not ENERGY STAR certified. It is a value-focused pick that sits below the top premium brands on brand and dealer support.

Professional installation required; dealer-quoted.

4 zonesProfessional installCurrent

Refrigerant generation

R-454B - current-generation refrigerant

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Error Codes
Klimaire KMHR Hyper Heat Series 4-Zone 26,000 BTU R-454B 208/230V (KMHR427-H225-4) mini-split heat pump outdoor condenser

Image: Klimaire

Data completeness: 95%
Last sourced
Jul 29, 2026

SplitAtlas score

8.3 / 10

Methodology
Cooling efficiencyBelow average

(21.0 SEER2) among 24k systems

Heating efficiencyAbove average

(10.0 HSPF2) among 24k systems

Cold-weather performanceTop 10%

(100% heat retained at 5F; -22 F heating floor) among 24k systems

WarrantyBelow average

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

Feature setBelow average

(4 verified features) across the catalogue

Documentation & partsBelow average

(6 manuals; spec sheet) 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

27,000BTU/hNon-Ducted Indoor Units[2]

Rated heating

27,000BTU/hNon-Ducted Indoor Units[2]

Buyer review snapshot

Best for / skip if

Best for

  • 4-zone projects in the 24k outdoor capacity class.

Install difficulty

Professional flared-line install
  • Electrical: 230V; MCA 30 A; breaker/fuse 35 A.
  • Line set: Flared line connections; max 262.4 ft.
  • 4-zone condenser; indoor-head matching and branch layout are part of the job.

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 2026-07-29.

Source date

Model data sourced
Jul 29, 2026
Page reviewed
Jul 29, 2026
Source-backed records
4
Newest source retrieved
Jul 29, 2026

Warranty tiers

Warranty: 5 years parts and 7 years compressor if registration/installation terms.

Review methodology

Model context

Install path
This is professional-install equipment; no verified current retail offer is attached.
Structured ratings
Certification: ENERGY STAR certified and AHRI cold-climate designated. Refrigerant: current low-GWP R-454B. Minimum heating ambient: -22 F.

Strengths

  • Certified nominal SEER2 21 / EER2 12 / HSPF2 10 on current R-454B refrigerant.
  • Rated heating rises in the cold - 27,000 BTU at 47F up to 29,000 BTU at 17F, and 27,000 BTU at 5F.
  • Four zones from one condenser cover a whole small floor.
  • Value price below the premium brands on current low-GWP refrigerant.

Weaknesses

  • Not ENERGY STAR certified and below the top premium brands on brand/dealer support.
  • 27,000 BTU across four zones is modest per room; size each head.

Climate suitability

Minimum heating ambient
-22 F[1]
Rated heating at 5F
27,000 BTU/hNon-Ducted Indoor Units[2]
Rated heating at 17F
29,000 BTU/hNon-Ducted Indoor Units[2]
Rated heating at 47F
27,000 BTU/hNon-Ducted Indoor Units[2]

Specifications

Show
Manufacturer
Klimaire
Brand
Klimaire
Product line
KMHR Hyper Heat Series
Model number
KMHR427-H225-4
Indoor unit model
Indoor heads are selected separately on a multi-zone system
Outdoor unit model
KMHR427-H225-4
Number of zones
4
Max indoor units
4 units[1]
Rated cooling capacity
27,000 BTU/hNon-Ducted Indoor Units[2]
Rated heating capacity
27,000 BTU/hNon-Ducted Indoor Units[2]
Voltage
230 V[1]
MCA
30 A[1]
Maximum fuse or breaker size
35 A[1]
Breaker needed
not published
SEER2
21 SEER2Non-Ducted Indoor Units[2]
EER2
12 EER2Non-Ducted Indoor Units[2]
HSPF2 (Region 4)
10 HSPF2Non-Ducted Indoor Units[2]
HSPF2 (Region 5)
Certified per indoor-unit combination, not per outdoor unit
COP
not published
COP at 47F
not published
COP at 5F
not published
Minimum outdoor heating temperature
-22 F[1]
Minimum outdoor cooling temperature
-22 F[1]
Maximum outdoor temperature
122 F[1]
Indoor noise range
Indoor heads are selected separately on a multi-zone system
Outdoor noise rating
61 dBA[1]
Indoor weight
Indoor heads are selected separately on a multi-zone system
Outdoor weight
168.43 lb[1]
Refrigerant
R-454B[2]
Refrigerant charge
120.63 oz[1]
Manufacturer coverage
not published
Line-set size
4 x 1/4 in liquid / 3 x 3/8 in + 1 x 1/2 in suction
Included line-set length
Indoor heads are selected separately on a multi-zone system
Maximum line-set length
262.4 ft[1]
Max line set per indoor
114.8 ft[1]
Maximum elevation difference
49.2 ft[1]
Max height between indoor units
not published
Wi-Fi support
Indoor heads are selected separately on a multi-zone system
Energy Star status
Not ENERGY STAR certified[3]
AHRI certification number
217489286Non-Ducted Indoor Units[2]
Warranty
Best case: 5 yr parts / 7 yr compressor (registration/installation terms). 7-year compressor, 5-year parts warranty with Klimaire registration/installation terms.
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 2026-07-29.
Available retailers
not published
Manual links
AHRI public detail 217489286, Klimaire KMIR/KMHR Multi-Zone Combination Rule and official indoor-unit pages, ENERGY STAR exact lookup 217489286, Klimaire KMHR Hyper Heat Series official product page for KMHR427-H225-4, HVACDirect exact-offer audit for KMHR427-H225-4, Klimaire KMHR Hyper Heat Series official product-page specification table
Specification sheet
Klimaire KMHR Hyper Heat Series official product-page specification table
Last sourced date
Jul 29, 2026

Compatible indoor units

This is an outdoor unit. You choose its indoor heads separately - up to the maximum this condenser supports - and you can mix room sizes and styles across the zones. The models below are the heads this unit is documented to pair with.

  • Ceiling cassette air handlers

    9k, 12k, 18k, 24k

    Model numbers
    • 9k: KTIS09-HS2-4
    • 12k: KTIS012-H2-4
    • 18k: KTIS18-H2-4
    • 24k: KTIS024-H2-4

  • Ducted multi-position air handlers

    18k, 24k

    Model numbers
    • 18k: KDIC18-H2-4
    • 24k: KDIC24-H2-4

  • Ducted recessed air handlers

    18k

    Model numbers
    • 18k: KDIP18-H2

  • Floor/ceiling air handlers

    18k, 24k

    Model numbers
    • 18k: KUIR18-H2-4
    • 24k: KUIR24-H2-4

  • Wall-mounted air handlers

    6k, 9k, 12k, 18k, 24k

    Model numbers
    • 6k: KSIH006-H225-IW-4
    • 9k: KSIH009-H225-IW-4
    • 12k: KSIH012-H222-IW-4
    • 18k: KSIH018-H220-IW-4
    • 24k: KSIH024-H220-IW-4

Sizing note: do not just add up the rooms. Multi-zone condensers have a maximum total connected capacity, and connecting more head capacity than the unit is rated for is a common installer mistake that hurts efficiency and comfort. Match total head capacity to the condenser's rating.

Electrical requirements

Show
Voltage
230 V[1]
Voltage range
208/230V[1]
Phase
1[1]
Frequency
60 Hz[1]
MCA
30 A[1]
Breaker needed
not published
Maximum breaker size
35 A[1]
Maximum fuse size
35 A[1]
Maximum cooling current
not published
Maximum heating current
not published
Manufacturer wire notes
not published

Installation considerations

Show
Liquid line
4 x 1/4 in[1]
Suction line
3 x 3/8 in + 1 x 1/2 in[1]
Line connection type
Flared line connections[1]
Precharged length
not published
Included line-set length
Indoor heads are selected separately on a multi-zone system
Maximum line-set length
262.4 ft[1]
Max line set per indoor
114.8 ft[1]
Max height between indoor units
not published
Indoor dimensions
Indoor heads are selected separately on a multi-zone system
Outdoor dimensions
37.24 x 16.14 x 31.89 in[1]
Indoor weight
Indoor heads are selected separately on a multi-zone system
Outdoor weight
168.43 lb[1]
Drain size
not published

Related systems and guides

Frequently asked questions

Can I install the Klimaire KMHR Hyper Heat Series 4-Zone 26,000 BTU R-454B 208/230V (KMHR427-H225-4) myself, or do I need a pro?
Klimaire KMHR Hyper Heat Series 4-Zone 26,000 BTU R-454B 208/230V (KMHR427-H225-4) 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 Klimaire KMHR Hyper Heat Series 4-Zone 26,000 BTU R-454B 208/230V (KMHR427-H225-4) keep heating in a cold winter?
The manufacturer publishes 27,000 BTU/h of heating output at 5F. Rated heating operation extends down to -22 F. Certified heating efficiency is 10 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 Klimaire KMHR Hyper Heat Series 4-Zone 26,000 BTU R-454B 208/230V (KMHR427-H225-4) need?
Published electrical requirements: 230 V voltage, 30 A minimum circuit ampacity, and 35 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 262.4 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 Klimaire KMHR Hyper Heat Series 4-Zone 26,000 BTU R-454B 208/230V (KMHR427-H225-4) carry?
The manufacturer publishes these warranty tiers: Best case: 5 yr parts / 7 yr compressor (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. Klimaire Products Inc.: Klimaire KMHR Hyper Heat Series official product-page evidence for KMHR536-H224-4Sourced - manufacturer product page

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

  2. AHRI certificate #217489286 - search the AHRI DirectorySourced - AHRI directory

    Covers AHRI certification number, performance_spec.cold_climate_designation, Rated cooling capacity, EER2, Rated heating capacity, HSPF2 (Region 4) and more

  3. ENERGY STAR: ENERGY STAR exact row check for AHRI 215735288Sourced - Energy Star listing

    Covers performance_spec.energy_star_cold_climate, Energy Star status

  4. Klimaire Products Inc.: Klimaire KMIR Series official product-page evidence for KMIR536-H224-4Sourced - manufacturer product page

    Covers Best-case compressor warranty, Best-case warranty conditions, Best-case parts warranty

  5. Klimaire KMIR/KMHR Multi-Zone Combination Rule and official indoor-unit pagesSourced - manual

    Covers Manual links

Last updated

Jul 29, 2026