SplitAtlas

Fujitsu / AIRSTAGE H-series

Fujitsu AIRSTAGE H-series 36k Concealed Ducted R-32 208/230V Mini-Split

Certified capacity
36,000 BTU/h[2]
SEER2
18 SEER2[2]
Heating floor
-5 F[1]
Voltage
208/230V[1]
Install path
Professional install

The Fujitsu AIRSTAGE H-series Mid Static Duct 36k pairs ARUH36KUAS with AOUH36KUAS1 for a professional, dealer-quoted concealed ducted indoor unit installation instead of a wall head. It certifies at 36,000 BTU cooling and 38,000 BTU heating at 47F, with 18 SEER2, 10.4 EER2, and 9.8 HSPF2.

Its certified 5F output is 31,000 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 40,000 BTU at 5F, while this standard pairing is the moderate-climate choice at 31,000 BTU.

1 zoneProfessional installCurrent

Refrigerant generation

R-32 - current-generation refrigerant

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

SplitAtlas score

8.3 / 10

Methodology
Cooling efficiencyBottom quartile

(18.0 SEER2) among 36k systems

Heating efficiencyAbove average

(9.8 HSPF2) among 36k systems

Cold-weather performanceAbove average

(81.6% heat retained at 5F; -5 F heating floor) among 36k systems

NoiseAbove average

(-37 dBA indoor min / 59 dBA outdoor) among 36k 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

36,000BTU/h[2]

Rated heating

38,000BTU/h[2]

Best-fit use cases

Best for small ducted zones, suites, and renovations where the indoor unit needs to disappear above a ceiling around 1,400-1,800 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 20.8 A; breaker/fuse 25 A.
  • Line set: connection type not sourced; precharged 66 ft; max 164 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

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
Concealed ducted installs depend on duct layout, static pressure, return-air path, condensate routing, and service access. Cold-weather output still needs a load calculation and installation clearances, not just the published AHRI rating.

Strengths

  • 36,000 BTU of concealed ducted indoor unit capacity on current R-32 refrigerant.
  • 18 SEER2 / 10.4 EER2 / 9.8 HSPF2 certified efficiency.
  • 25,400 BTU at 17F and 31,000 BTU at 5F give real winter numbers to size against.

Weaknesses

  • At 18 SEER2 the concealed-ducted line trades efficiency for hidden installation - the cassettes in the same H-Series reach 26.3 - so pick ducted for the look, not the operating cost. It also needs a 25 A circuit where the smallest concealed-ducted heads in the H-Series run on 15 A, so the electrical work is not a like-for-like swap.

Climate suitability

Minimum heating ambient
-5 F[1]
Rated heating at 5F
31,000 BTU/h[2]
Rated heating at 17F
25,400 BTU/h[2]
Rated heating at 47F
38,000 BTU/h[2]

Specifications

Show
Manufacturer
Fujitsu
Brand
Fujitsu
Product line
AIRSTAGE H-series
Model number
ARUH36KUAS indoor / AOUH36KUAS1 outdoor
Indoor unit model
ARUH36KUAS
Outdoor unit model
AOUH36KUAS1
Number of zones
1
Max indoor units
not published
Rated cooling capacity
36,000 BTU/h[2]
Rated heating capacity
38,000 BTU/h[2]
Voltage
208/230V[1]
MCA
20.8 A[1]
Maximum fuse or breaker size
25 A[1]
Breaker needed
not published
SEER2
18 SEER2[2]
EER2
10.4 EER2[2]
HSPF2 (Region 4)
9.8 HSPF2[2]
HSPF2 (Region 5)
not published
COP
not published
COP at 47F
3.52 COP[1]
COP at 5F
2.08 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 26-37; heating 26-37 dB(A)[1]
Outdoor noise rating
59 dBA[1]
Indoor weight
121 lb[1]
Outdoor weight
137 lb[1]
Refrigerant
R-32[1]
Refrigerant charge
71 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
164 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
215434560[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 ARUH36KUAS installation manual, Fujitsu Connect product record AOUH36KUAS1, Fujitsu AIRSTAGE H-series Mid Static Duct submittal - ARUH36KUAS / AOUH36KUAS1
Specification sheet
Fujitsu AIRSTAGE H-series Mid Static Duct submittal - ARUH36KUAS / AOUH36KUAS1
Last sourced date
Aug 5, 2026

Electrical requirements

Show
Voltage
not published
Voltage range
208/230V[1]
Phase
single-phase[1]
Frequency
60 Hz[1]
MCA
20.8 A[1]
Breaker needed
not published
Maximum breaker size
25 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
3/8 in[1]
Suction line
5/8 in[1]
Line connection type
not published
Precharged length
66 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
164 ft[1]
Max line set per indoor
not published
Max height between indoor units
not published
Indoor dimensions
11-13/16 x 55-1/8 x 27-9/16 in[1]
Outdoor dimensions
39-5/16 x 37 x 12-5/8 in[1]
Indoor weight
121 lb[1]
Outdoor weight
137 lb[1]
Drain size
not published

Related systems and guides

Frequently asked questions

Can I install the Fujitsu AIRSTAGE H-series Mid Static Duct 36,000 BTU R-32 208/230V (ARUH36KUAS / AOUH36KUAS1) myself, or do I need a pro?
Fujitsu AIRSTAGE H-series Mid Static Duct 36,000 BTU R-32 208/230V (ARUH36KUAS / AOUH36KUAS1) 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 Mid Static Duct 36,000 BTU R-32 208/230V (ARUH36KUAS / AOUH36KUAS1) keep heating in a cold winter?
The manufacturer publishes 31,000 BTU/h of heating output at 5F. Rated heating operation extends down to -5 F. Certified heating efficiency is 9.8 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 Mid Static Duct 36,000 BTU R-32 208/230V (ARUH36KUAS / AOUH36KUAS1) need?
Published electrical requirements: 208/230V voltage, 20.8 A minimum circuit ampacity, and 25 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 164 ft, and the included line set comes pre-charged for 66 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 Mid Static Duct submittalSourced - manufacturer technical document

    Covers Frequency, electrical_spec.guaranteed_voltage_range, Maximum breaker size, Minimum circuit ampacity, Phase, Voltage 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