Carrier / Infinity 25
Carrier Infinity 25 36k R-454B 208/230V 5-Zone Mini-Split
The Carrier Infinity 25 5-Zone 36k (37MGHAQ36EA3) is the largest premium cold-climate condenser, and unlike the dealer-quoted Performance line, this Infinity condenser is stocked and purchasable at retail - a priced condenser you can buy, still professionally installed. It carries a certified nominal SEER2 of 23.1, EER2 13.1, and HSPF2 10.7, is ENERGY STAR certified and AHRI cold-climate designated, on current low-GWP R-454B refrigerant.
Cooling is rated at 36000 BTU, with heating of 36000 BTU at 47F, a peak of 38000 at 17F, and 36000 held at 5F. Heating that rises above its 47F rating at 17F and holds level at 5F is true deep-cold performance at the top of the line.
Professional installation required.
Refrigerant generation
R-454B - current-generation refrigerant
Image: Carrier
- Last sourced
- Jul 28, 2026
SplitAtlas score
9.3 / 10
(23.1 SEER2) among 36k systems
(10.7 HSPF2) among 36k systems
(100% heat retained at 5F; -22 F heating floor) among 36k systems
(10 yr parts / 10 yr compressor) across the catalogue
(7 verified features) across the catalogue
(7 manuals) 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
quote-only - no retail price to evaluate
Key ratings
Buyer review snapshot
Best for / skip if
Best for
- 5-zone projects in the 36k outdoor capacity class.
- High-efficiency shortlists; SEER2 is 23.1.
Install difficulty
- Electrical: 230V; MCA 37 A; breaker/fuse 40 A.
- Line set: Flared line connections; precharged 24.6 ft; max 262.5 ft.
- 5-zone condenser; indoor-head matching and branch layout are part of the job.
Availability and price context
- Warranty warning: Warranty coverage does not apply to any product purchased over the Internet. Online listing: $5,499.99 at HVACDirect; checked Jul 28, 2026; price source is HVACDirect.
Purchase channel policy
Carrier's ductless warranty excludes products purchased over the Internet; buyers should treat public online carts as outside the warranty-covered purchase channel.
- Warranty consequence
- Warranty coverage does not apply to any product purchased over the Internet.
- Authorized channel
- Licensed HVAC technician installation with defective parts returned to the distributor through a registered servicing dealer; not an internet purchase.
Any online offer for this brand should be treated as a warranty-risk warning, not a recommendation.
Compare online-purchase warranty rules by brand
Source: Carrier Corporation: CAC/BDP Limited Warranty Certificate - Limited Warranty for Ductless Split Units; retrieved Aug 15, 2026.
Source date
- Model data sourced
- Jul 28, 2026
- Page reviewed
- Jul 28, 2026
- Source-backed records
- 5
- Newest source retrieved
- Jul 28, 2026
Warranty tiers
Warranty: 10 years parts and no separate compressor term published as standard.
Model context
- Structured ratings
- Certification: ENERGY STAR certified and AHRI cold-climate designated. Refrigerant: current low-GWP R-454B. Minimum heating ambient: -22 F.
Strengths
- Buyable equipment - a stocked, priced Infinity condenser you can purchase, professionally installed.
- Heating peaks at 38000 BTU at 17F, above its 47F rating, and holds 36000 at 5F.
- Largest capacity in the line: 36000 BTU cooling across five zones, HSPF2 10.7.
- ENERGY STAR certified and AHRI cold-climate designated on R-454B.
Weaknesses
- Professional installation still required - equipment you buy, not a DIY kit.
- Lowest cooling efficiency in this group (SEER2 23.1).
- Multi-zone part-load penalty when few heads are running.
Climate suitability
- Minimum heating ambient
- -22 F[4]
- Rated heating at 5F
- 36,000 BTU/hNon-Ducted Indoor Units[2]
- Rated heating at 17F
- 38,000 BTU/hNon-Ducted Indoor Units[2]
- Rated heating at 47F
- 36,000 BTU/hNon-Ducted Indoor Units[2]
Specifications
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- Manufacturer
- Carrier
- Brand
- Carrier
- Product line
- Infinity 25
- Model number
- 37MGHAQ36EA3
- Indoor unit model
- Indoor heads are selected separately on a multi-zone system
- Outdoor unit model
- 37MGHAQ36EA3
- Number of zones
- 5
- Max indoor units
- 5 units[1]
- Rated cooling capacity
- 36,000 BTU/hNon-Ducted Indoor Units[2]
- Rated heating capacity
- 36,000 BTU/hNon-Ducted Indoor Units[2]
- Voltage
- 230 V[1]
- MCA
- 37 A[1]
- Maximum fuse or breaker size
- 40 A[1]
- Breaker needed
- not published
- SEER2
- 23.1 SEER2Non-Ducted Indoor Units[2]
- EER2
- 13.1 EER2Non-Ducted Indoor Units[2]
- HSPF2 (Region 4)
- 10.7 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
- 2 COPNon-Ducted Indoor Units[2]
- Minimum outdoor heating temperature
- -22 F[4]
- Minimum outdoor cooling temperature
- -22 F[4]
- Maximum outdoor temperature
- 122 F[4]
- Indoor noise range
- Indoor heads are selected separately on a multi-zone system
- Outdoor noise rating
- 65 dBA[1]
- Indoor weight
- Indoor heads are selected separately on a multi-zone system
- Outdoor weight
- 211.86 lb[1]
- Refrigerant
- R-454B[2]
- Refrigerant charge
- 134.08 oz[1]
- Manufacturer coverage
- not published
- Line-set size
- 1/4 in x 5 liquid / 3/8 in x 3 + 1/2 in x 2 suction
- Included line-set length
- Indoor heads are selected separately on a multi-zone system
- Maximum line-set length
- 262.5 ft[1]
- Max line set per indoor
- 114.8 ft[1]
- Maximum elevation difference
- 49.21 ft[1]
- Max height between indoor units
- 33 ft[1]
- Wi-Fi support
- Indoor heads are selected separately on a multi-zone system
- Energy Star status
- ENERGY STAR certified[3]
- AHRI certification number
- 215357453Non-Ducted Indoor Units[2]
- Warranty
- Standard: 10 yr parts / no separate compressor term (Consumer Choice 10-year parts-only option). Consumer Choice Warranty: 10-year parts-only option or 5-year parts plus 3-year labor option
- Install path
- Professional install
- Retail price
- online listing with warranty risk: $5,499.99
- Available retailers
- HVACDirect
- Manual links
- AHRI public detail 215357453, ENERGY STAR exact row 215357453, Infinity 25 Carrier ductless current brochure, Carrier Ductless Systems compatibility charts, Carrier Infinity 25 Multi-Zone High-Heat Mini Split Heat Pump with Basepan Heater, HVACDirect exact Carrier affiliate offer carrier-infinity-25-5-zone-36k-r454b-230v, Carrier R-454B ductless Consumer Choice Warranty
- Specification sheet
- not published
- Last sourced date
- Jul 28, 2026
Retail purchase context
Warranty consequence
Warranty coverage does not apply to any product purchased over the Internet.
Any online offer for this brand should be treated as a warranty-risk warning, not a recommendation.
Authorized channel: Licensed HVAC technician installation with defective parts returned to the distributor through a registered servicing dealer; not an internet purchase.
Some retailer links may earn us a commission at no extra cost; paid relationships never change scores or recommendations. Affiliate disclosure
Paid link
Warranty-risk online listing
Listed at HVACDirect: $5,500. Checked Jul 28, 2026; price source HVACDirect.
Installation considerations
ShowHide
- Liquid line
- 1/4 in x 5[1]
- Suction line
- 3/8 in x 3 + 1/2 in x 2[1]
- Line connection type
- Flared line connections[1]
- Precharged length
- 24.6 ft[1]
- Included line-set length
- Indoor heads are selected separately on a multi-zone system
- Maximum line-set length
- 262.5 ft[1]
- Max line set per indoor
- 114.8 ft[1]
- Max height between indoor units
- 33 ft[1]
- Indoor dimensions
- Indoor heads are selected separately on a multi-zone system
- Outdoor dimensions
- 38.58 x 16.34 x 38.39 in[1]
- Indoor weight
- Indoor heads are selected separately on a multi-zone system
- Outdoor weight
- 211.86 lb[1]
- Drain size
- not published
Related systems and guides
- More Carrier systems
- Carrier 36k model
- Carrier 230 V option
- Bosch comparison model
- Carrier 36k model
- Guide library
- Mini split buying guide
- Single-zone vs multi-zone mini splits
- Troubleshooting
- Do mini splits work in cold weather?
- Carrier mini split review: is Carrier any good?
- The best multi-zone mini splits of 2026
- The best 4-zone mini splits of 2026
- How to size a multi-zone mini split
- Not every multi-zone condenser lets you mix head types
- How much does a multi-zone mini split cost?
- The best cold-climate mini splits of 2026
- The best mini splits for heating of 2026
- Mini split heating capacity in the cold: what your unit actually delivers at 5F
- One room won't heat or cool on a multi-zone mini split
- Mini split not heating
- Mini split indoor unit freezing up
- Mini split short cycling
- Mini split remote not working
- Line sets
- Line-set covers
Frequently asked questions
- Can I install the Carrier Infinity 25 5-Zone 36,000 BTU R-454B 208/230V (37MGHAQ36EA3) myself, or do I need a pro?
- Carrier Infinity 25 5-Zone 36,000 BTU R-454B 208/230V (37MGHAQ36EA3) 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 Carrier Infinity 25 5-Zone 36,000 BTU R-454B 208/230V (37MGHAQ36EA3) keep heating in a cold winter?
- The manufacturer publishes 36,000 BTU/h of heating output at 5F. Rated heating operation extends down to -22 F. Certified heating efficiency is 10.7 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 Carrier Infinity 25 5-Zone 36,000 BTU R-454B 208/230V (37MGHAQ36EA3) need?
- Published electrical requirements: 230 V voltage, 37 A minimum circuit ampacity, and 40 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 262.5 ft, and the included line set comes pre-charged for 24.6 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 Carrier Infinity 25 5-Zone 36,000 BTU R-454B 208/230V (37MGHAQ36EA3) carry?
- The manufacturer publishes these warranty tiers: Standard: 10 yr parts / no separate compressor term (Consumer Choice 10-year parts-only option). Registration requirements and proof of qualified installation commonly affect coverage, so read the warranty terms before install day.
Data sources
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- Carrier Corporation: Carrier Infinity 25 37MG multi-zone compatibility and technical evidenceSourced - manufacturer technical document
Covers Frequency, Maximum breaker size, Maximum fuse size, Minimum circuit ampacity, Phase, Voltage and more
- Air-Conditioning, Heating, and Refrigeration Institute: AHRI public detail 215357453Sourced - AHRI directory
Covers AHRI certification number, performance_spec.cold_climate_designation, Rated cooling capacity, COP at 5F, EER2, Rated heating capacity and more
- U.S. Environmental Protection Agency ENERGY STAR: ENERGY STAR exact row check for AHRI 215357453Sourced - Energy Star listing
Covers Energy Star status
- Carrier Corporation: Carrier Infinity 25 Multi-Zone High-Heat Mini Split Heat Pump with Basepan HeaterSourced - manufacturer product page
Covers Minimum outdoor cooling temperature, Minimum outdoor heating temperature, Maximum outdoor temperature, Legacy compressor warranty value, Legacy warranty value, Standard compressor warranty status and more
- HVACDirect: HVACDirect exact Carrier offer for 37MGHAQ36EA3Sourced - retailer listing
Covers Retail price
Last updated
Jul 28, 2026