SplitAtlas

Fujitsu / AIRSTAGE H-series

Fujitsu AIRSTAGE H-series 12k Air Handler R-32 208/230V Mini-Split

Certified capacity
12,000 BTU/h[2]
SEER2
19.9 SEER2[2]
Heating floor
-5 F[1]
Voltage
208/230V[1]
Install path
Professional install

The Fujitsu AIRSTAGE H-series Multi-Position Air Handler 12k pairs AMUH12KUAS with AOUH12KUBS1 for a professional, dealer-quoted multi-position air handler installation instead of a wall head. It certifies at 12,000 BTU cooling and 16,000 BTU heating at 47F, with 19.9 SEER2, 13 EER2, and 10.3 HSPF2.

Its certified 5F output is 16,100 BTU, matching or beating the 17F rating, so it is a serious cold-weather candidate. The catch is that it behaves like a compact air handler, so duct sizing, filtration access, condensate management, and optional heat-kit planning matter.

1 zoneProfessional installCurrent

Refrigerant generation

R-32 - current-generation refrigerant

Error Codes
Data completeness: 100%
Last sourced
Aug 5, 2026

SplitAtlas score

8.8 / 10

Methodology
Cooling efficiencyBelow average

(19.9 SEER2) among 12k systems

Heating efficiencyAbove average

(10.3 HSPF2) among 12k systems

Cold-weather performanceTop 10%

(100% heat retained at 5F; -5 F heating floor) among 12k systems

NoiseTop quartile

(-42 dBA indoor min / 49 dBA outdoor) among 12k systems

Documentation & partsTop quartile

(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

    quote-only - no retail price to evaluate

Key ratings

Rated cooling

12,000BTU/h[2]

Rated heating

16,000BTU/h[2]

Best-fit use cases

Best for closets, attics, and retrofit duct runs where a compact air handler is a better fit than a wall head around 400-600 sq ft, where the owner wants Fujitsu dealer support and the alternate indoor form is worth the installation work.

Buyer review snapshot

Install difficulty

Professional install
  • Electrical: 208/230V; MCA 14.2 A; breaker/fuse 15 A.
  • Line set: connection type not sourced; precharged 65 ft; max 98 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 2026-08-05.

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

Review methodology

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

  • 12,000 BTU of multi-position air handler capacity on current R-32 refrigerant.
  • 19.9 SEER2 / 13 EER2 / 10.3 HSPF2 certified efficiency.
  • 10,600 BTU at 17F and 16,100 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
16,100 BTU/h[2]
Rated heating at 17F
10,600 BTU/h[2]
Rated heating at 47F
16,000 BTU/h[2]

Specifications

Show
Manufacturer
Fujitsu
Brand
Fujitsu
Product line
AIRSTAGE H-series
Model number
AMUH12KUAS indoor / AOUH12KUBS1 outdoor
Indoor unit model
AMUH12KUAS
Outdoor unit model
AOUH12KUBS1
Number of zones
1
Max indoor units
not published
Rated cooling capacity
12,000 BTU/h[2]
Rated heating capacity
16,000 BTU/h[2]
Voltage
208/230V[1]
MCA
14.2 A[1]
Maximum fuse or breaker size
15 A[1]
Breaker needed
not published
SEER2
19.9 SEER2[2]
EER2
13 EER2[2]
HSPF2 (Region 4)
10.3 HSPF2[2]
HSPF2 (Region 5)
not published
COP
not published
COP at 47F
not published
COP at 5F
2.06 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 31-42; heating 30-41 dB(A)[1]
Outdoor noise rating
49 dBA[1]
Indoor weight
101 lb[1]
Outdoor weight
84 lb[1]
Refrigerant
R-32[2]
Refrigerant charge
not published
Manufacturer coverage
not published
Line-set size
1/4 in liquid / 3/8 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
98 ft[1]
Max line set per indoor
not published
Maximum elevation difference
49 ft[1]
Max height between indoor units
not published
Wi-Fi support
supported[1]
Energy Star status
ENERGY STAR certified[2]
AHRI certification number
217734523[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 AMUH12KUAS installation manual, Fujitsu Connect product record AOUH12KUBS1, Fujitsu AIRSTAGE H-series Multi-Position Air Handler submittal - AMUH12KUAS / AOUH12KUBS1
Specification sheet
Fujitsu AIRSTAGE H-series Multi-Position Air Handler submittal - AMUH12KUAS / AOUH12KUBS1
Last sourced date
Aug 5, 2026

Electrical requirements

Show
Voltage
not published
Voltage range
208/230V[1]
Phase
single-phase[1]
Frequency
not published
MCA
14.2 A[1]
Breaker needed
not published
Maximum breaker size
15 A[1]
Maximum fuse size
not published
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
not published
Precharged length
65 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
98 ft[1]
Max line set per indoor
not published
Max height between indoor units
not published
Indoor dimensions
43 x 17-1/2 x 21 in[1]
Outdoor dimensions
24-7/8 x 31-7/16 x 11-7/16 in[1]
Indoor weight
101 lb[1]
Outdoor weight
84 lb[1]
Drain size
not published

Related systems and guides

Frequently asked questions

Can I install the Fujitsu AIRSTAGE H-series Multi-Position Air Handler 12,000 BTU R-32 208/230V (AMUH12KUAS / AOUH12KUBS1) myself, or do I need a pro?
Fujitsu AIRSTAGE H-series Multi-Position Air Handler 12,000 BTU R-32 208/230V (AMUH12KUAS / AOUH12KUBS1) 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 12,000 BTU R-32 208/230V (AMUH12KUAS / AOUH12KUBS1) keep heating in a cold winter?
The manufacturer publishes 16,100 BTU/h of heating output at 5F. Rated heating operation extends down to -5 F. Certified heating efficiency is 10.3 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 12,000 BTU R-32 208/230V (AMUH12KUAS / AOUH12KUBS1) need?
Published electrical requirements: 208/230V voltage, 14.2 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 98 ft, and the included line set comes pre-charged for 65 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

Show
  1. 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

  2. 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

  3. Fujitsu General America, Inc.: Fujitsu AIRSTAGE warranty pageSourced - manufacturer product page

    Covers Legacy compressor warranty value, Legacy warranty value

Last updated

Aug 5, 2026