Fujitsu / AIRSTAGE H-series
Fujitsu AIRSTAGE H-series 45.5k Air Handler R-32 208/230V Mini-Split
The Fujitsu AIRSTAGE H-series Multi-Position Air Handler 48k pairs AMUH48KUAS with AOUH48KUAS1 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 17 SEER2, 9.5 EER2, and 9.6 HSPF2.
Its certified 5F output is 41,000 BTU, matching or beating the 17F rating, so it is a serious cold-weather candidate. Fujitsu also has an XLTH outdoor for this head family and size; that version reaches 51,000 BTU at 5F, while this standard pairing is the moderate-climate choice at 41,000 BTU.
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
- Last sourced
- Aug 5, 2026
SplitAtlas score
not yet rated - data incomplete
- scored 4 of 7 applicable categories, need at least 5
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
Best for / skip if
Skip if
- Top-efficiency cooling is the priority; SEER2 is 17.
Install difficulty
- Electrical: 208/230V; MCA 29.9 A; breaker/fuse 30 A.
- Line set: connection type not sourced; precharged 98 ft; max 246 ft.
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 2026-08-05.
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
- 3
- Newest source retrieved
- Aug 5, 2026
Model context
- Fujitsu dealer channel
- Fujitsu equipment here is professional-install and quote-based; online purchase restrictions are handled in the purchase-channel policy when that brand fact is sourced.
- Install path
- This is professional-install equipment; no verified current retail offer is attached. Brand purchase-channel policy is shown in the buyer review snapshot.
- Installation context
- Cold-weather output still needs a load calculation and installation clearances, not just the published AHRI rating.
Strengths
- 45,500 BTU of multi-position air handler capacity on current R-32 refrigerant.
- 17 SEER2 / 9.5 EER2 / 9.6 HSPF2 certified efficiency.
- 37,200 BTU at 17F and 41,000 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
- -5 F[1]
- Rated heating at 5F
- 41,000 BTU/h[2]
- Rated heating at 17F
- 37,200 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 / AOUH48KUAS1 outdoor
- Indoor unit model
- AMUH48KUAS
- Outdoor unit model
- AOUH48KUAS1
- 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
- 29.9 A[1]
- Maximum fuse or breaker size
- 30 A[1]
- Breaker needed
- not published
- SEER2
- 17 SEER2[2]
- EER2
- 9.5 EER2[2]
- HSPF2 (Region 4)
- 9.6 HSPF2[2]
- HSPF2 (Region 5)
- not published
- COP
- not published
- COP at 47F
- 3.42 COP[1]
- COP at 5F
- 2.24 COP[2]
- Minimum outdoor heating temperature
- -5 F[1]
- Minimum outdoor cooling temperature
- -5 F[1]
- Maximum outdoor temperature
- 122 F[1]
- Indoor noise range
- cooling 34-49; heating 36-51 dB(A)[1]
- Outdoor noise rating
- not published
- Indoor weight
- 137 lb[1]
- Outdoor weight
- 157 lb[1]
- Refrigerant
- R-32[1]
- Refrigerant charge
- 95 oz[1]
- Manufacturer coverage
- not published
- Line-set size
- 3/8 in liquid / 5/8 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
- 217290597[2]
- Warranty
- not published
- 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 2026-08-05.
- Available retailers
- not published
- Manual links
- Fujitsu AMUH48KUAS installation manual, Fujitsu Connect product record AOUH48KUAS1, Fujitsu AIRSTAGE H-series Multi-Position Air Handler submittal - AMUH48KUAS / AOUH48KUAS1
- Specification sheet
- Fujitsu AIRSTAGE H-series Multi-Position Air Handler submittal - AMUH48KUAS / AOUH48KUAS1
- Last sourced date
- Aug 5, 2026
Electrical requirements
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Installation considerations
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- Liquid line
- 3/8 in[1]
- Suction line
- 5/8 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
- 39-5/16 x 37 x 12-5/8 in[1]
- Indoor weight
- 137 lb[1]
- Outdoor weight
- 157 lb[1]
- Drain size
- 1/2 in I.D.; 5/8 to 11/16 in O.D.[1]
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Frequently asked questions
- Can I install the Fujitsu AIRSTAGE H-series Multi-Position Air Handler 45,500 BTU R-32 208/230V (AMUH48KUAS / AOUH48KUAS1) myself, or do I need a pro?
- Fujitsu AIRSTAGE H-series Multi-Position Air Handler 45,500 BTU R-32 208/230V (AMUH48KUAS / AOUH48KUAS1) 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 Multi-Position Air Handler 45,500 BTU R-32 208/230V (AMUH48KUAS / AOUH48KUAS1) keep heating in a cold winter?
- The manufacturer publishes 41,000 BTU/h of heating output at 5F. Rated heating operation extends down to -5 F. Certified heating efficiency is 9.6 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 Multi-Position Air Handler 45,500 BTU R-32 208/230V (AMUH48KUAS / AOUH48KUAS1) need?
- Published electrical requirements: 208/230V voltage, 29.9 A minimum circuit ampacity, and 30 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, and the included line set comes pre-charged for 98 ft. Longer runs than the included set allows typically mean added refrigerant and a pro visit, so 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 Frequency, electrical_spec.guaranteed_voltage_range, Maximum breaker size, Minimum circuit ampacity, Phase, Voltage 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.: Fujitsu AIRSTAGE warranty pageSourced - manufacturer product page
Covers Legacy compressor warranty value, Legacy warranty value
Last updated
Aug 5, 2026