SplitAtlas

Fujitsu / AIRSTAGE Orion XLTH

Fujitsu AIRSTAGE Orion XLTH 18k XLTH R-32 208/230V Mini-Split

Certified capacity
18,000 BTU/h[3]
SEER2
25.5 SEER2[3]
Heating floor
-15 F[1]
Voltage
208/230V[1]
Install path
Professional install

The Orion XLTH 18k brings Fujitsu's cold-climate flagship to 1.5 tons: SEER2 25.5 / EER2 14 / HSPF2 12.5 on R-32, ENERGY STAR certified, with a huge 24,800 BTU of heat at 5F. It is built to keep a large room warm through a hard winter.

1 zoneProfessional installCurrent

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
Error Codes
Fujitsu AIRSTAGE Orion XLTH 18,000 BTU R-32 208/230V (ASUH18KZAS / AOUH18KZAH1)

Image: Fujitsu

Data completeness: 100%
Last sourced
Jul 23, 2026

SplitAtlas score

9.5 / 10

Methodology
Cooling efficiencyTop 10%

(25.5 SEER2) among 18k systems

Heating efficiencyTop 10%

(12.5 HSPF2) among 18k systems

Cold-weather performanceTop quartile

(5F certified capacity: 100% of the 47F rating; -15 F heating floor) among 18k systems

NoiseAbove average

(30 dBA indoor min / 50 dBA outdoor) among 18k systems

WarrantyTop quartile

(10 yr parts / 10 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

    This is a professionally installed, quote-only system, so we can't score its price. Get an installed quote to compare real cost.

    Get a quote

Key ratings

Rated cooling

18,000BTU/h[3]

Rated heating

21,600BTU/h[3]

Buyer review snapshot

Best for / skip if

Best for

  • Top efficiency shortlists; SEER2 is 25.5.

Install difficulty

Professional install
  • Electrical: 208/230V; MCA 19.4 A; breaker/fuse 20 A.
  • Line set: connection type not sourced; precharged 66 ft; max 164 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
Jul 23, 2026
Page reviewed
Jul 23, 2026
Source-backed records
7
Newest source retrieved
Sep 12, 2026

Warranty tiers

Base
5 yr parts / 7 yr compressor - out-of-box residential coverage
Registered
10 yr parts / 10 yr compressor - registration within 60 days
Program
12 yr parts / 12 yr compressor - Fujitsu Elite contractor installation and registration

The score uses Registered. Additional published terms are shown for reference and not counted in the score.

Review methodology

Strengths

  • SEER2 25.5 / HSPF2 12.5 with an enormous 24,800 BTU of heat at 5F - top-tier cold-climate output at 1.5 tons.
  • ENERGY STAR certified; Fujitsu cold-climate pedigree.

Weaknesses

  • Premium price; 230V and professional installation.
  • Overkill for mild climates.

Climate suitability

Minimum heating ambient
-15 F[1]
Heating capacity at −15°F
19,110 BTU/h[5]
Certified heating at 5F
24,800 BTU/h[3]
Rated heating at 17F
13,600 BTU/h[3]
Rated heating at 47F
21,600 BTU/h[3]

Specifications

Show
Manufacturer
Fujitsu
Brand
Fujitsu
Product line
AIRSTAGE Orion XLTH
Model number
ASUH18KZAS indoor / AOUH18KZAH1 outdoor
Indoor unit model
ASUH18KZAS
Outdoor unit model
AOUH18KZAH1
Number of zones
1
Max indoor units
not published
Rated cooling capacity
18,000 BTU/h[3]
Rated heating capacity
21,600 BTU/h[3]
Voltage
208/230V[1]
MCA
19.4 A[1]
Maximum fuse or breaker size
20 A[1]
Breaker needed
not published
SEER2
25.5 SEER2[3]
EER2
14 EER2[3]
HSPF2 (Region 4)
12.5 HSPF2[3]
HSPF2 (Region 5)
not published
COP
not published
COP at 47F
4.36 COP[1]
COP at 5F
2.08 COP[3]
Minimum outdoor heating temperature
-15 F[1]
Minimum outdoor cooling temperature
14 F[1]
Maximum outdoor temperature
122 F[1]
Indoor noise range
cooling 30-44; heating 30-46 dB(A)[1]
Outdoor noise rating
50 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
215647921[3]
Warranty
Base: 5 yr parts / 7 yr compressor (out-of-box residential coverage); Registered: 10 yr parts / 10 yr compressor (registration within 60 days); Program: 12 yr parts / 12 yr compressor (Fujitsu Elite contractor installation and registration). Score uses Registered. Additional published terms are shown for reference and not counted in the score.. 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
Authorized dealers only
Available retailers
not published
Manual links
AHRI certificate 215647921, AHRI public directory record 215647921, ENERGY STAR record 3629537 for ASUH18KZAS / AOUH18KZAH1, AOUH18KZAH1 installation manual, ASUH18KZAS installation manual, Fujitsu Connect product record AOUH18KZAH1, Fujitsu Connect product record ASUH18KZAS, Fujitsu AIRSTAGE Orion XLTH wall-mounted R-32 product page, ASUH18KZAS / AOUH18KZAH1 submittal
Specification sheet
ASUH18KZAS / AOUH18KZAH1 submittal
Last sourced date
Jul 23, 2026

Parts and filters

Fits Fujitsu AIRSTAGE Orion XLTH 18,000 BTU R-32 208/230V (ASUH18KZAS / AOUH18KZAH1). 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 Orion XLTH 18,000 BTU R-32 208/230V (ASUH18KZAS / AOUH18KZAH1)
Filter care
Replace the Apple-Catechin filter about every 3 months and the ion deodorizing filter about every 3 years; wash the ion deodorizing filter with diluted neutral detergent, rinse, and shade-dry every 3 months in between.
Fit note
Fits ASUH18KZAS / AOUH18KZAH1. 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 ASUH09KZAS / AOUH09KZAH1 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 Orion XLTH 18,000 BTU R-32 208/230V (ASUH18KZAS / AOUH18KZAH1)
OEM part number
UTY-RNRUZ5
Fit note
Fits ASUH18KZAS / AOUH18KZAH1. Manufacturer documentation publishes this OEM part number for this model family. Fujitsu General says public online retail sales are not authorized. Source through an authorized Fujitsu contractor/distributor with the model and serial number.
Source
Fujitsu AIRSTAGE ASUH09KZAS / AOUH09KZAH1 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 Orion XLTH 18,000 BTU R-32 208/230V (ASUH18KZAS / AOUH18KZAH1)
OEM part number
UTY-RSRY
Fit note
Fits ASUH18KZAS / AOUH18KZAH1. Manufacturer documentation publishes this OEM part number for this model family. Fujitsu General says public online retail sales are not authorized. Source through an authorized Fujitsu contractor/distributor with the model and serial number.
Source
Fujitsu AIRSTAGE ASUH09KZAS / AOUH09KZAH1 Submittal, ACCESSORIES, page p. 4 (UTY-RSRY*1 Simple Wired Remote (With Mode Function))

communication-kit

Fujitsu wall-mount communication kit

Fits
Fujitsu AIRSTAGE Orion XLTH 18,000 BTU R-32 208/230V (ASUH18KZAS / AOUH18KZAH1)
OEM part number
UTY-TWRXZ2
Fit note
Fits ASUH18KZAS / AOUH18KZAH1. Manufacturer documentation publishes this OEM part number for this model family. Fujitsu General says public online retail sales are not authorized. Source through an authorized Fujitsu contractor/distributor with the model and serial number.
Source
Fujitsu AIRSTAGE ASUH09KZAS / AOUH09KZAH1 Submittal, ACCESSORIES, page p. 4 (UTY-TWRXZ2 Communication Kit - Wall Mount)

thermostat-interface

Fujitsu 24V thermostat interface

Fits
Fujitsu AIRSTAGE Orion XLTH 18,000 BTU R-32 208/230V (ASUH18KZAS / AOUH18KZAH1)
OEM part number
UTY-TTRXZ1
Fit note
Fits ASUH18KZAS / AOUH18KZAH1. Manufacturer documentation publishes this OEM part number for this model family. Fujitsu General says public online retail sales are not authorized. Source through an authorized Fujitsu contractor/distributor with the model and serial number.
Source
Fujitsu AIRSTAGE ASUH09KZAS / AOUH09KZAH1 Submittal, ACCESSORIES, page p. 4 (UTY-TTRXZ1*1, 2 24V Thermostat Interface)

external-io-pcb

Fujitsu external input and output PCB

Fits
Fujitsu AIRSTAGE Orion XLTH 18,000 BTU R-32 208/230V (ASUH18KZAS / AOUH18KZAH1)
OEM part number
UTY-XCSXZ2
Fit note
Fits ASUH18KZAS / AOUH18KZAH1. Manufacturer documentation publishes this OEM part number for this model family. Fujitsu General says public online retail sales are not authorized. Source through an authorized Fujitsu contractor/distributor with the model and serial number.
Source
Fujitsu AIRSTAGE ASUH09KZAS / AOUH09KZAH1 Submittal, ACCESSORIES, page p. 4 (UTY-XCSXZ2 External input and output PCB)
Find this model's filterReplacement Parts & Filters

Electrical requirements

Show
Voltage
not published
Voltage range
208/230V[1]
Phase
single-phase[2]
Frequency
60 Hz[1]
MCA
19.4 A[1]
Breaker needed
not published
Maximum breaker size
20 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 Orion XLTH 18,000 BTU R-32 208/230V (ASUH18KZAS / AOUH18KZAH1) myself, or do I need a pro?
Fujitsu AIRSTAGE Orion XLTH 18,000 BTU R-32 208/230V (ASUH18KZAS / AOUH18KZAH1) 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 Orion XLTH 18,000 BTU R-32 208/230V (ASUH18KZAS / AOUH18KZAH1) keep heating in a cold winter?
The AHRI/ENERGY STAR certification lists 24,800 BTU/h of heating capacity at 5F. Rated heating operation extends down to -15 F. Certified heating efficiency is 12.5 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 Orion XLTH 18,000 BTU R-32 208/230V (ASUH18KZAS / AOUH18KZAH1) need?
Published electrical requirements: 208/230V voltage, 19.4 A minimum circuit ampacity, and 20 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. The outdoor unit's factory charge covers up to 66 ft of line; longer runs need added refrigerant. Measure the planned routing before ordering.
What warranty does the Fujitsu AIRSTAGE Orion XLTH 18,000 BTU R-32 208/230V (ASUH18KZAS / AOUH18KZAH1) carry?
The manufacturer publishes these warranty tiers: Base: 5 yr parts / 7 yr compressor (out-of-box residential coverage); Registered: 10 yr parts / 10 yr compressor (registration within 60 days); Program: 12 yr parts / 12 yr compressor (Fujitsu Elite contractor installation and registration). Score uses Registered. Additional published terms are shown for reference and not counted in the score.. 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.: ASUH18KZAS & AOUH18KZAH1 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.: AOUH18KZAH1 installation manualSourced - manufacturer technical document

    Covers Phase

  3. AHRI Directory: AHRI public directory record 215647921Sourced - 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 3629537 for ASUH18KZAS / AOUH18KZAH1Sourced - Energy Star listing

    Covers Energy Star status

  5. Northeast Energy Efficiency Partnerships: NEEP ccASHP Product List record 385842Sourced - primary source

    Covers Maximum heating capacity at low temperature, Low-temperature heating capacity test point

  6. Fujitsu General America, Inc.: Fujitsu AIRSTAGE Orion XLTH wall-mounted R-32 product pageSourced - manufacturer product page

    Covers Additional published compressor warranty, Additional published warranty conditions, Additional published parts warranty, Legacy compressor warranty value, Legacy warranty value, Base compressor warranty and more

  7. Fujitsu General America, Inc.: Fujitsu AIRSTAGE Orion XLTH wall-mounted R-32 product pageSourced - manufacturer product page

    Covers Registered compressor warranty, Registered warranty conditions, Registered parts warranty

Last updated

Jul 23, 2026