Fujitsu / AIRSTAGE H-series
Fujitsu AIRSTAGE H-series 45.5k XLTH Air Handler R-32 208/230V Mini-Split
The Fujitsu AIRSTAGE H-series XLTH Multi-Position Air Handler 48k pairs AMUH48KUAS with AOUH48KUAH1 for a professional, dealer-quoted multi-position air handler installation instead of a wall head. It certifies at 45,500 BTU cooling and 51,000 BTU heating at 47F, with 19 SEER2, 11.2 EER2, and 10.2 HSPF2.
Its certified 5F output is 51,000 BTU, matching or beating the 17F rating, so it is a serious cold-weather candidate. Compared with the standard AOUH48KUAS1 pairing at the same head family and capacity class, this XLTH version raises 5F heat from 41,000 to 51,000 BTU; choose it when winter output matters more than lowest installed cost.
The catch is that it behaves like a compact air handler, so duct sizing, filtration access, condensate management, and optional heat-kit planning matter.
Refrigerant generation
R-32 - current-generation refrigerant
This brand doesn't honor its warranty on systems bought online. Buy it through a local contractor who installs it: get quotes from installers in your area, and ask whether they're an authorized dealer for this brand.
Get installation quotes- Last sourced
- Aug 5, 2026
SplitAtlas score
8.4 / 10
(19.0 SEER2) among >36k systems
(10.2 HSPF2) among >36k systems
(5F certified capacity: 100% of the 47F rating; -15 F heating floor) among >36k systems
(34 dBA indoor min / 54 dBA outdoor) across the catalogue
(3 manuals; spec sheet; 36 error-code rows) 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.
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Key ratings
Best-fit use cases
Best for larger retrofit duct runs, light-commercial air-handler applications, and zoned spaces sized by load calculation, where the owner wants Fujitsu dealer support and the alternate indoor form is worth the installation work.
Buyer review snapshot
Install difficulty
- Electrical: 208/230V; MCA 37.5 A; breaker/fuse 45 A.
- Line set: connection type not sourced; precharged 98 ft; max 246 ft.
Availability and price context
Fujitsu sells this system through authorized dealers and contractors, not online, and doesn't honor its warranty on systems bought online. Get installation quotes and ask whether the installer is an authorized Fujitsu dealer.
Purchase channel policy
Fujitsu/GENERAL says online retail sales of its products are not authorized; buyers should treat public online carts as outside the approved purchase channel.
- Warranty consequence
- Warranty becomes null and void for online purchases.
- Authorized channel
- Authorized local distributor or contractor channel; password-protected distributor sites are for qualified technicians.
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: Fujitsu General America, Inc.: GENERAL AIRSTAGE MINI-SPLITS FAQ - online purchase policy; retrieved Aug 12, 2026.
Source date
- Model data sourced
- Aug 5, 2026
- Page reviewed
- Aug 5, 2026
- Source-backed records
- 5
- Newest source retrieved
- Sep 12, 2026
Model context
- Installation context
- Cold-weather output still needs a load calculation and installation clearances, not just the published AHRI rating.
Strengths
- 51,000 BTU at 5F from the XLTH outdoor, with multi-position air handler distribution.
- 19 SEER2 / 11.2 EER2 / 10.2 HSPF2 certified efficiency.
- 34,000 BTU at 17F and 51,000 BTU at 5F give real winter numbers to size against.
Weaknesses
- The catch is that it behaves like a compact air handler, so duct sizing, filtration access, condensate management, and optional heat-kit planning matter.
Climate suitability
- Minimum heating ambient
- -15 F[3]
- Heating capacity at −15°F
- 51,000 BTU/h[4]
- Certified heating at 5F
- 51,000 BTU/h[2]
- Rated heating at 17F
- 34,000 BTU/h[2]
- Rated heating at 47F
- 51,000 BTU/h[2]
Specifications
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- Manufacturer
- Fujitsu
- Brand
- Fujitsu
- Product line
- AIRSTAGE H-series
- Model number
- AMUH48KUAS indoor / AOUH48KUAH1 outdoor
- Indoor unit model
- AMUH48KUAS
- Outdoor unit model
- AOUH48KUAH1
- Number of zones
- 1
- Max indoor units
- not published
- Rated cooling capacity
- 45,500 BTU/h[2]
- Rated heating capacity
- 51,000 BTU/h[2]
- Voltage
- 208/230V[1]
- MCA
- 37.5 A[1]
- Maximum fuse or breaker size
- 45 A[1]
- Breaker needed
- not published
- SEER2
- 19 SEER2[2]
- EER2
- 11.2 EER2[2]
- HSPF2 (Region 4)
- 10.2 HSPF2[2]
- HSPF2 (Region 5)
- not published
- COP
- not published
- COP at 47F
- not published
- COP at 5F
- 1.96 COP[2]
- Minimum outdoor heating temperature
- -15 F[3]
- Minimum outdoor cooling temperature
- -5 F[3]
- Maximum outdoor temperature
- 122 F[3]
- Indoor noise range
- cooling 34-49; heating 36-51 dB(A)[1]
- Outdoor noise rating
- 54 dBA[1]
- Indoor weight
- 137 lb[1]
- Outdoor weight
- 225 lb[1]
- Refrigerant
- R-32[2]
- Refrigerant charge
- not published
- Manufacturer coverage
- not published
- Line-set size
- 03/8 in liquid / 05/8 in suction
- Included line-set length
- Fujitsu publishes pre-charge length and flared line sizes; the installer supplies the line set.
- Maximum line-set length
- 246 ft[1]
- Max line set per indoor
- not published
- Maximum elevation difference
- 98 ft[1]
- Max height between indoor units
- not published
- Wi-Fi support
- supported[1]
- Energy Star status
- ENERGY STAR certified[2]
- AHRI certification number
- 217895718[2]
- Warranty
- not published
- Install path
- Professional install
- Retail price
- Authorized dealers only
- Available retailers
- not published
- Manual links
- Fujitsu AMUH48KUAS installation manual, Fujitsu Connect product record AOUH48KUAH1, Fujitsu AIRSTAGE H-series Multi-Position Air Handler submittal - AMUH48KUAS / AOUH48KUAH1
- Specification sheet
- Fujitsu AIRSTAGE H-series Multi-Position Air Handler submittal - AMUH48KUAS / AOUH48KUAH1
- Last sourced date
- Aug 5, 2026
Electrical requirements
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Installation considerations
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- Liquid line
- 03/8 in[1]
- Suction line
- 05/8 in[1]
- Line connection type
- not published
- Precharged length
- 98 ft[1]
- Included line-set length
- Fujitsu publishes pre-charge length and flared line sizes; the installer supplies the line set.
- Maximum line-set length
- 246 ft[1]
- Max line set per indoor
- not published
- Max height between indoor units
- not published
- Indoor dimensions
- 48 x 21 x 21 in[1]
- Outdoor dimensions
- 55-13/16 x 38-3/16 x 14-9/16 in[1]
- Indoor weight
- 137 lb[1]
- Outdoor weight
- 225 lb[1]
- Drain size
- not published
Related systems and guides
- More Fujitsu systems
- Fujitsu AIRSTAGE H-series 45.5k Air Handler R-32 208/230V Mini-Split
- Daikin Standard Multi 48k R-32 208/230V 5-Zone Mini-Split
- Fujitsu AIRSTAGE H-series 46k Circular Cassette R-32 208/230V Mini-Split
- Fujitsu AIRSTAGE H-series 45k R-32 208/230V 5-Zone Mini-Split
- Guide library
- Mini split buying guide
- Single-zone vs multi-zone mini splits
- Troubleshooting
- Do mini splits work in cold weather?
- Fujitsu mini split review: is Fujitsu any good?
- 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
- The mini split defrost cycle, explained
- The best DIY mini splits of 2026
- What "DIY mini split" actually means
- How to install a mini split (DIY overview)
- R-32 vs R-454B: the mini split refrigerant change explained
- Mini split not heating
- Mini split indoor unit freezing up
- Mini split remote not working
- One room won't heat or cool on a multi-zone mini split
- Mini split Wi-Fi not connecting
- Line sets
- Line-set covers
Frequently asked questions
- Can I install the Fujitsu AIRSTAGE H-series XLTH Multi-Position Air Handler 45,500 BTU R-32 208/230V (AMUH48KUAS / AOUH48KUAH1) myself, or do I need a pro?
- Fujitsu AIRSTAGE H-series XLTH Multi-Position Air Handler 45,500 BTU R-32 208/230V (AMUH48KUAS / AOUH48KUAH1) 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 Fujitsu AIRSTAGE H-series XLTH Multi-Position Air Handler 45,500 BTU R-32 208/230V (AMUH48KUAS / AOUH48KUAH1) keep heating in a cold winter?
- The AHRI/ENERGY STAR certification lists 51,000 BTU/h of heating capacity at 5F. Rated heating operation extends down to -15 F. Certified heating efficiency is 10.2 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 Fujitsu AIRSTAGE H-series XLTH Multi-Position Air Handler 45,500 BTU R-32 208/230V (AMUH48KUAS / AOUH48KUAH1) need?
- Published electrical requirements: 208/230V voltage, 37.5 A minimum circuit ampacity, and 45 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 246 ft. The outdoor unit's factory charge covers up to 98 ft of line; longer runs need added refrigerant. Measure the planned routing before ordering.
Data sources
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- Fujitsu General America, Inc.: Fujitsu AIRSTAGE H-series Multi-Position Air Handler submittalSourced - manufacturer technical document
Covers Maximum breaker size, Minimum circuit ampacity, Phase, Voltage range, Indoor dimensions, Indoor noise range and more
- Air-Conditioning, Heating, and Refrigeration Institute: AHRI Active form-factor row 217895718Sourced - AHRI directory
Covers AHRI certification number, Rated cooling capacity, COP at 5F, EER2, Energy Star status, Rated heating capacity and more
- Fujitsu General America, Inc.: AMUH48KUAS & AOUH48KUAH1 submittalSourced - manufacturer technical document
Covers Minimum outdoor cooling temperature, Minimum outdoor heating temperature, Maximum outdoor temperature
- Northeast Energy Efficiency Partnerships: NEEP ccASHP Product List record 306745Sourced - primary source
Covers Maximum heating capacity at low temperature, Low-temperature heating capacity test point
- Fujitsu General America, Inc.: Fujitsu AIRSTAGE warranty pageSourced - manufacturer product page
Covers Legacy compressor warranty value, Legacy warranty value
Last updated
Aug 5, 2026