SplitAtlas

Fujitsu / AIRSTAGE Altair 500

Fujitsu AIRSTAGE Altair 500 36k R-32 208/230V Mini-Split

Certified capacity
33,000 BTU/h[3]
SEER2
21 SEER2[3]
Heating floor
5 F[1]
Voltage
208/230V[1]
Install path
Professional install

The Altair 500 36k is Fujitsu's mainstream 3-ton single-zone: 34,000 BTU of heat at 47F and a strong 25,800 BTU at 5F, ENERGY STAR certified at SEER2 21 on R-32. Efficiency dips at this size (EER2 9.75) as expected, but it stays certified - unlike some rival 3-ton single-zones.

1 zoneProfessional installCurrent

Refrigerant generation

R-32 - current-generation refrigerant

Error Codes
Fujitsu AIRSTAGE Altair 500 36,000 BTU R-32 208/230V (ASUH36KPAS / AOUH36KPAS1)

Image: Fujitsu

Data completeness: 100%
Last sourced
Jul 23, 2026

SplitAtlas score

8.8 / 10

Methodology
Cooling efficiencyAbove average

(21.0 SEER2) among 36k systems

Heating efficiencyAbove average

(10.0 HSPF2) among 36k systems

Cold-weather performanceBelow average

(75.9% heat retained at 5F; 5 F heating floor) among 36k systems

NoiseTop 10%

(-51 dBA indoor min / 56 dBA outdoor) among 36k systems

WarrantyTop quartile

(12 yr parts / 12 yr compressor) across the catalogue

Documentation & partsTop quartile

(9 manuals; spec sheet; parts channel) 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

33,000BTU/h[3]

Rated heating

34,000BTU/h[3]

Best-fit use cases

A large open area or great room needing 3 tons from a single head in a cold-capable climate, where the buyer wants an ENERGY-STAR-certified Fujitsu.

Buyer review snapshot

Install difficulty

Professional install
  • Electrical: 208/230V; MCA 18.4 A; breaker/fuse 30 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 2026-07-23.

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
Jul 23, 2026
Page reviewed
Jul 23, 2026
Source-backed records
5
Newest source retrieved
Jul 23, 2026

Warranty tiers

Warranty: 5 years parts and 7 years compressor as standard; 12 years parts and compressor if Fujitsu Elite contractor installation and registration.

Review methodology

Strengths

  • 3 tons that remains ENERGY STAR certified at SEER2 21 with strong cold output (25,800 BTU at 5F) - better than many big single-zones.
  • Fujitsu brand and dealer support.

Weaknesses

  • EER2 9.75 - peak-summer full-load efficiency drops at this size.
  • 230V and professional installation; genuinely large-space only.

Climate suitability

Minimum heating ambient
5 F[1]
Rated heating at 5F
25,800 BTU/h[3]
Rated heating at 17F
22,400 BTU/h[3]
Rated heating at 47F
34,000 BTU/h[3]

Specifications

Show
Manufacturer
Fujitsu
Brand
Fujitsu
Product line
AIRSTAGE Altair 500
Model number
ASUH36KPAS indoor / AOUH36KPAS1 outdoor
Indoor unit model
ASUH36KPAS
Outdoor unit model
AOUH36KPAS1
Number of zones
1
Max indoor units
not published
Rated cooling capacity
33,000 BTU/h[3]
Rated heating capacity
34,000 BTU/h[3]
Voltage
208/230V[1]
MCA
18.4 A[1]
Maximum fuse or breaker size
30 A[1]
Breaker needed
not published
SEER2
21 SEER2[3]
EER2
9.75 EER2[3]
HSPF2 (Region 4)
10 HSPF2[3]
HSPF2 (Region 5)
not published
COP
not published
COP at 47F
3.3 COP[1]
COP at 5F
2.2 COP[3]
Minimum outdoor heating temperature
5 F[1]
Minimum outdoor cooling temperature
14 F[1]
Maximum outdoor temperature
122 F[1]
Indoor noise range
cooling 32-51; heating 32-48 dB(A)[1]
Outdoor noise rating
56 dBA[1]
Indoor weight
36 lb[1]
Outdoor weight
117 lb[1]
Refrigerant
R-32[1]
Refrigerant charge
60 oz[1]
Manufacturer coverage
not published
Line-set size
3/8 in liquid / 5/8 in suction
Included line-set length
Fujitsu publishes factory 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[4]
AHRI certification number
215390441[3]
Warranty
Standard: 5 yr parts / 7 yr compressor (out-of-box residential coverage); Best case: 12 yr parts / 12 yr compressor (Fujitsu Elite contractor installation and registration). 10-year parts and compressor warranty when registered within 60 days for residential installation; 12-year parts and compressor tier when installed by a Fujitsu Elite contractor; 7-year compressor/5-year parts out-of-the-box warranty.
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 2026-07-23.
Available retailers
not published
Manual links
AHRI certificate 215390441, AHRI public directory record 215390441, ENERGY STAR record 3621237 for ASUH36KPAS / AOUH36KPAS1, AOUH36KPAS1 installation manual, ASUH36KPAS installation manual, Fujitsu Connect product record AOUH36KPAS1, Fujitsu Connect product record ASUH36KPAS, Fujitsu AIRSTAGE Altair 500 wall-mounted R-32 product page, ASUH36KPAS / AOUH36KPAS1 submittal
Specification sheet
ASUH36KPAS / AOUH36KPAS1 submittal
Last sourced date
Jul 23, 2026

Parts and filters

Fits Fujitsu AIRSTAGE Altair 500 36,000 BTU R-32 208/230V (ASUH36KPAS / AOUH36KPAS1). Part numbers and fit notes identify compatibility only; no manufacturer endorsement is implied.

filter-set

Fujitsu Apple-Catechin and ion deodorizing filter set

Fits
Fujitsu AIRSTAGE Altair 500 36,000 BTU R-32 208/230V (ASUH36KPAS / AOUH36KPAS1)
Fit note
Fits ASUH36KPAS / AOUH36KPAS1. The submittal names the dual-action filtration set but does not publish separate orderable filter part numbers in the sourced table. Source through Fujitsu support or an authorized dealer with the model and serial number.
Source
Fujitsu AIRSTAGE ASUH09KPAS / AOUH09KPAS1 Submittal, Features, page p. 1 (Dual-action Filtration: Apple-Catechin Filter & Ion Deodorizing Filter)

wired-controller

Fujitsu touch panel wired remote controller

Fits
Fujitsu AIRSTAGE Altair 500 36,000 BTU R-32 208/230V (ASUH36KPAS / AOUH36KPAS1)
OEM part number
UTY-RNRUZ5
Fit note
Fits ASUH36KPAS / AOUH36KPAS1. Manufacturer documentation publishes this OEM part number for this model family. t255 lookup on 2026-08-12 checked HVACDirect exact/search results, Amazon exact-listing search, public exact-part search, and Fujitsu/GENERAL's online-sales FAQ; no public exact destination with a current price from HVACDirect, Amazon, or a Fujitsu-authorized online parts seller was found. HVACDirect direct fetches were Cloudflare-blocked where exact pages existed, and Fujitsu/GENERAL's own FAQ says public online retail sales are not authorized. Source through an authorized Fujitsu contractor/distributor with the model and serial number.
Source
Fujitsu AIRSTAGE ASUH09KPAS / AOUH09KPAS1 Submittal, ACCESSORIES, page p. 4 (UTY-RNRUZ5*1 Touch Panel Wired Remote Controller)

simple-wired-remote

Fujitsu simple wired remote with mode function

Fits
Fujitsu AIRSTAGE Altair 500 36,000 BTU R-32 208/230V (ASUH36KPAS / AOUH36KPAS1)
OEM part number
UTY-RSRY
Fit note
Fits ASUH36KPAS / AOUH36KPAS1. Manufacturer documentation publishes this OEM part number for this model family. t255 lookup on 2026-08-12 checked HVACDirect exact/search results, Amazon exact-listing search, public exact-part search, and Fujitsu/GENERAL's online-sales FAQ; no public exact destination with a current price from HVACDirect, Amazon, or a Fujitsu-authorized online parts seller was found. HVACDirect direct fetches were Cloudflare-blocked where exact pages existed, and Fujitsu/GENERAL's own FAQ says public online retail sales are not authorized. Source through an authorized Fujitsu contractor/distributor with the model and serial number.
Source
Fujitsu AIRSTAGE ASUH09KPAS / AOUH09KPAS1 Submittal, ACCESSORIES, page p. 4 (UTY-RSRY*1 Simple Wired Remote (With Mode Function))

communication-kit

Fujitsu wall-mount communication kit

Fits
Fujitsu AIRSTAGE Altair 500 36,000 BTU R-32 208/230V (ASUH36KPAS / AOUH36KPAS1)
OEM part number
UTY-TWRXZ2
Fit note
Fits ASUH36KPAS / AOUH36KPAS1. Manufacturer documentation publishes this OEM part number for this model family. t255 lookup on 2026-08-12 checked HVACDirect exact/search results, Amazon exact-listing search, public exact-part search, and Fujitsu/GENERAL's online-sales FAQ; no public exact destination with a current price from HVACDirect, Amazon, or a Fujitsu-authorized online parts seller was found. HVACDirect direct fetches were Cloudflare-blocked where exact pages existed, and Fujitsu/GENERAL's own FAQ says public online retail sales are not authorized. Source through an authorized Fujitsu contractor/distributor with the model and serial number.
Source
Fujitsu AIRSTAGE ASUH09KPAS / AOUH09KPAS1 Submittal, ACCESSORIES, page p. 4 (UTY-TWRXZ2 Communication Kit - Wall Mount)

thermostat-interface

Fujitsu 24V thermostat interface

Fits
Fujitsu AIRSTAGE Altair 500 36,000 BTU R-32 208/230V (ASUH36KPAS / AOUH36KPAS1)
OEM part number
UTY-TTRXZ1
Fit note
Fits ASUH36KPAS / AOUH36KPAS1. Manufacturer documentation publishes this OEM part number for this model family. t255 lookup on 2026-08-12 checked HVACDirect exact/search results, Amazon exact-listing search, public exact-part search, and Fujitsu/GENERAL's online-sales FAQ; no public exact destination with a current price from HVACDirect, Amazon, or a Fujitsu-authorized online parts seller was found. HVACDirect direct fetches were Cloudflare-blocked where exact pages existed, and Fujitsu/GENERAL's own FAQ says public online retail sales are not authorized. Source through an authorized Fujitsu contractor/distributor with the model and serial number.
Source
Fujitsu AIRSTAGE ASUH09KPAS / AOUH09KPAS1 Submittal, ACCESSORIES, page p. 4 (UTY-TTRXZ1*1, 2 24V Thermostat Interface)

external-io-pcb

Fujitsu external input and output PCB

Fits
Fujitsu AIRSTAGE Altair 500 36,000 BTU R-32 208/230V (ASUH36KPAS / AOUH36KPAS1)
OEM part number
UTY-XCSXZ2
Fit note
Fits ASUH36KPAS / AOUH36KPAS1. Manufacturer documentation publishes this OEM part number for this model family. t255 lookup on 2026-08-12 checked HVACDirect exact/search results, Amazon exact-listing search, public exact-part search, and Fujitsu/GENERAL's online-sales FAQ; no public exact destination with a current price from HVACDirect, Amazon, or a Fujitsu-authorized online parts seller was found. HVACDirect direct fetches were Cloudflare-blocked where exact pages existed, and Fujitsu/GENERAL's own FAQ says public online retail sales are not authorized. Source through an authorized Fujitsu contractor/distributor with the model and serial number.
Source
Fujitsu AIRSTAGE ASUH09KPAS / AOUH09KPAS1 Submittal, ACCESSORIES, page p. 4 (UTY-XCSXZ2 External input and output PCB)
Replacement Parts & Filters

Electrical requirements

Show
Voltage
not published
Voltage range
208/230V[1]
Phase
single-phase[2]
Frequency
60 Hz[1]
MCA
18.4 A[1]
Breaker needed
not published
Maximum breaker size
30 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 factory 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
13-3/8 x 45-1/4 x 11 in[1]
Outdoor dimensions
31 x 37 x 12-5/8 in[1]
Indoor weight
36 lb[1]
Outdoor weight
117 lb[1]
Drain size
17/32 in I.D.; 19/32 to 21/32 in O.D.[1]

Related systems and guides

Frequently asked questions

Can I install the Fujitsu AIRSTAGE Altair 500 36,000 BTU R-32 208/230V (ASUH36KPAS / AOUH36KPAS1) myself, or do I need a pro?
Fujitsu AIRSTAGE Altair 500 36,000 BTU R-32 208/230V (ASUH36KPAS / AOUH36KPAS1) 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 Altair 500 36,000 BTU R-32 208/230V (ASUH36KPAS / AOUH36KPAS1) keep heating in a cold winter?
The manufacturer publishes 25,800 BTU/h of heating output at 5F. Rated heating operation extends down to 5 F. Certified heating efficiency is 10 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 Altair 500 36,000 BTU R-32 208/230V (ASUH36KPAS / AOUH36KPAS1) need?
Published electrical requirements: 208/230V voltage, 18.4 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 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.
What warranty does the Fujitsu AIRSTAGE Altair 500 36,000 BTU R-32 208/230V (ASUH36KPAS / AOUH36KPAS1) carry?
The manufacturer publishes these warranty tiers: Standard: 5 yr parts / 7 yr compressor (out-of-box residential coverage); Best case: 12 yr parts / 12 yr compressor (Fujitsu Elite contractor installation and registration). Registration requirements and proof of qualified installation commonly affect coverage, so read the warranty terms before install day.

Data sources

Show
  1. Fujitsu General America, Inc.: ASUH36KPAS & AOUH36KPAS1 submittalSourced - manufacturer technical document

    Covers Frequency, electrical_spec.guaranteed_voltage_range, Maximum breaker size, Minimum circuit ampacity, Voltage range, Drain size and more

  2. Fujitsu General America, Inc.: AOUH36KPAS1 installation manualSourced - manufacturer technical document

    Covers Phase

  3. AHRI Directory: AHRI public directory record 215390441Sourced - AHRI directory

    Covers AHRI certification number, Rated cooling capacity, COP at 5F, EER2, Rated heating capacity, HSPF2 (Region 4) and more

  4. ENERGY STAR: ENERGY STAR certified mini-split row 3621237 for ASUH36KPAS / AOUH36KPAS1Sourced - Energy Star listing

    Covers Energy Star status

  5. Fujitsu General America, Inc.: Fujitsu AIRSTAGE Altair 500 wall-mounted R-32 product pageSourced - manufacturer product page

    Covers Best-case compressor warranty, Best-case warranty conditions, Best-case parts warranty, Legacy compressor warranty value, Legacy warranty value, Standard compressor warranty and more

Last updated

Jul 23, 2026