Samsung / WindFree IAQ
Samsung WindFree IAQ 18k R-32 208/230V Mini-Split
The IAQ 18k brings WindFree comfort and filtration to an open-plan room at SEER2 21.5, rated to -5F. For a living space where draughts and dust are the complaint, this is a sensible choice. For a room that has to hold heat in a real winter it is not - Max Heat is the tier that reaches -22F, at the same efficiency band.
Refrigerant generation
R-32 - current-generation refrigerant
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Image: Samsung
- Last sourced
- Jul 23, 2026
SplitAtlas score
8.1 / 10
(21.5 SEER2) among 18k systems
(9.0 HSPF2) among 18k systems
(5F certified capacity: 59.5% of the 47F rating; -5 F heating floor) among 18k systems
(27 dBA indoor min / 51 dBA outdoor) among 18k systems
(10 yr parts / 10 yr compressor) across the catalogue
(6 verified features) across the catalogue
(2 manuals; spec sheet) 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.
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Key ratings
Buyer review snapshot
Install difficulty
- Electrical: 230V; MCA 21 A; breaker/fuse 30 A.
- Line set: connection type not sourced; precharged 24.6 ft; max 98 ft.
Alternatives
- Blueridge XS6 Max Efficiency 18,000 BTU R-454B 208/230V (BXS6A18WM0 / BXS6A18UC0)
9.2 score / 18k / SEER2 25.6 / -22 F heating floor / 230V
Exact destination at Alpine Home Air: $2,359.00, checked Jul 24, 2026
- Senville ELITE 18,000 BTU R-454B 208/230V (SENE-18EL-IHH / SENE-18EL-OH)
9.0 score / 18k / SEER2 25.6 / -22 F heating floor / 187-253V
Exact destination at Senville: $1,899.99, checked Jul 24, 2026
- ACiQ Standard 18,000 BTU R-454B 208/230V (ACIQ-18WS-HP230C / ACIQ-18ZS-HP230C)
9.0 score / 18k / SEER2 24 / -13 F heating floor / 230V
Exact destination at HVACDirect: $1,299.99, checked Jul 26, 2026
Availability and price context
This system needs a professional install, so its real price is an installed quote that depends on your home. We don't link to a listing for this exact model; get installation quotes to price it.
Source date
- Model data sourced
- Jul 23, 2026
- Page reviewed
- Jul 23, 2026
- Source-backed records
- 4
- Newest source retrieved
- Jul 23, 2026
Warranty tiers
- Registered
- 10 yr parts / 10 yr compressor - eligible registered system
The score uses Registered. Additional published terms are shown for reference and not counted in the score.
Strengths
- WindFree no-draft operation plus filtration at 1.5 tons.
Weaknesses
- -5F heating floor - not a cold-climate system.
- Max Heat offers the same efficiency band with -22F.
Climate suitability
- Minimum heating ambient
- -5 F[1]
- Certified heating at 5F
- 12,500 BTU/h[2]
- Rated heating at 17F
- 15,000 BTU/h[2]
- Rated heating at 47F
- 21,000 BTU/h[2]
Specifications
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- Manufacturer
- Samsung
- Brand
- Samsung
- Product line
- WindFree IAQ
- Model number
- AR18DXKAPWKN indoor / AR18DXFAMWKX outdoor
- Indoor unit model
- AR18DXKAPWKN
- Outdoor unit model
- AR18DXFAMWKX
- Number of zones
- 1
- Max indoor units
- not published
- Rated cooling capacity
- 18,000 BTU/h[2]
- Rated heating capacity
- 21,000 BTU/h[2]
- Voltage
- 230 V[1]
- MCA
- 21 A[1]
- Maximum fuse or breaker size
- 30 A[1]
- Breaker needed
- not published
- SEER2
- 21.5 SEER2[2]
- EER2
- 12.85 EER2[2]
- HSPF2 (Region 4)
- 9 HSPF2[2]
- HSPF2 (Region 5)
- not published
- COP
- not published
- COP at 47F
- not published
- COP at 5F
- 2.09 COP[2]
- Minimum outdoor heating temperature
- -5 F[1]
- Minimum outdoor cooling temperature
- 14 F[1]
- Maximum outdoor temperature
- 115 F[1]
- Indoor noise range
- 41 / 27 dB(A)[1]
- Outdoor noise rating
- 51 dBA[1]
- Indoor weight
- 28.9 lb[1]
- Outdoor weight
- 108 lb[1]
- Refrigerant
- R-32[2]
- Refrigerant charge
- 53 oz[1]
- Manufacturer coverage
- not published
- Line-set size
- 1/4 in liquid / 1/2 in suction
- Included line-set length
- Samsung publishes piping sizes, chargeless/precharged length, and maximum line limits for this professional-install system; a line set is not included.
- Maximum line-set length
- 98 ft[1]
- Max line set per indoor
- not published
- Maximum elevation difference
- 66 ft[1]
- Max height between indoor units
- not published
- Wi-Fi support
- supported[1]
- Energy Star status
- ENERGY STAR certified[3]
- AHRI certification number
- 215222781[2]
- Warranty
- Registered: 10 yr parts / 10 yr compressor (eligible registered system). Score uses Registered.. 10 year warranty with product registration required; conditions apply.
- Install path
- Professional install
- Retail price
- Installed quote only
- Available retailers
- not published
- Manual links
- Samsung RAC R-32 WindFree installation manual, Samsung RAC R-32 technical data book
- Specification sheet
- Samsung RAC R-32 technical data book
- Last sourced date
- Jul 23, 2026
Electrical requirements
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- Voltage
- 230 V[1]
- Voltage range
- 208/230V[1]
- Phase
- 1[1]
- Frequency
- 60 Hz[1]
- MCA
- 21 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
- Outdoor unit powers indoor unit; communication AWG 18 or line-specific interconnect per manual[1]
Installation considerations
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- Liquid line
- 1/4 in[1]
- Suction line
- 1/2 in[1]
- Line connection type
- not published
- Precharged length
- 24.6 ft[1]
- Included line-set length
- Samsung publishes piping sizes, chargeless/precharged length, and maximum line limits for this professional-install system; a line set is not included.
- Maximum line-set length
- 98 ft[1]
- Max line set per indoor
- not published
- Max height between indoor units
- not published
- Indoor dimensions
- 41-9/16 x 13-9/16 x 8-7/16 in[1]
- Outdoor dimensions
- 34-5/8 x 31-7/16 x 12-3/16 in[1]
- Indoor weight
- 28.9 lb[1]
- Outdoor weight
- 108 lb[1]
- Drain size
- ID18 or 11/16 in OD[1]
Related systems and guides
- More Samsung systems
- Samsung Free Joint Multi Standard 20k R-32 208/230V 2-Zone Mini-Split
- Samsung WindFree Standard 18k R-32 208/230V Mini-Split
- Samsung Commercial Air Conditioner Premium High-Wall 18k R-32 208/230V Mini-Split
- Senville AURA 18k 230V Mini-Split
- Guide library
- Mini split buying guide
- Single-zone vs multi-zone mini splits
- Troubleshooting
- Samsung mini split review: is Samsung any good?
- The best 18,000 BTU mini splits of 2026
- The best DIY mini splits of 2026
- What "DIY mini split" actually means
- How to install a mini split (DIY overview)
- R-32 vs R-454B: the mini split refrigerant change explained
- What size mini split do I need for a garage?
- Mini splits for a workshop or shop
- Mini split brands to avoid: how to spot a bad one
- Samsung mini split not heating
- Mini split remote not working
- Mini split Wi-Fi not connecting
- Mini split not heating
- Line sets
- Line-set covers
Frequently asked questions
- Can I install the Samsung WindFree IAQ 18,000 BTU R-32 208/230V (AR18DXKAPWKN / AR18DXFAMWKX) myself, or do I need a pro?
- Samsung WindFree IAQ 18,000 BTU R-32 208/230V (AR18DXKAPWKN / AR18DXFAMWKX) 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 Samsung WindFree IAQ 18,000 BTU R-32 208/230V (AR18DXKAPWKN / AR18DXFAMWKX) keep heating in a cold winter?
- The AHRI/ENERGY STAR certification lists 12,500 BTU/h of heating capacity at 5F. Rated heating operation extends down to -5 F. Certified heating efficiency is 9 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 Samsung WindFree IAQ 18,000 BTU R-32 208/230V (AR18DXKAPWKN / AR18DXFAMWKX) need?
- Published electrical requirements: 230 V voltage, 21 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 98 ft. The outdoor unit's factory charge covers up to 24.6 ft of line; longer runs need added refrigerant. Measure the planned routing before ordering.
- What warranty does the Samsung WindFree IAQ 18,000 BTU R-32 208/230V (AR18DXKAPWKN / AR18DXFAMWKX) carry?
- The manufacturer publishes these warranty tiers: Registered: 10 yr parts / 10 yr compressor (eligible registered system). Score uses Registered.. Registration requirements and proof of qualified installation commonly affect coverage, so read the warranty terms before install day.
Data sources
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- Samsung HVAC, LLC: Samsung WindFree Standard manufacturer technical table for AR09DXFAMWKN / AR09DXFAMWKXSourced - manufacturer technical document
Covers Frequency, electrical_spec.guaranteed_voltage_range, Maximum breaker size, Minimum circuit ampacity, Phase, Manufacturer wire notes and more
- Air-Conditioning, Heating, and Refrigeration Institute: AHRI public detail 215222781 for AR18DXKAPWKN / AR18DXFAMWKXSourced - AHRI directory
Covers AHRI certification number, Rated cooling capacity, COP at 5F, EER2, Rated heating capacity, HSPF2 (Region 4) and more
- ENERGY STAR: ENERGY STAR record 3554500 for AR18DXFAMWKX / AR18DXKAPWKNSourced - Energy Star listing
Covers Energy Star status
- Samsung HVAC, LLC: Samsung WindFree IAQ product page warranty statementSourced - manufacturer product page
Covers Legacy compressor warranty value, Legacy warranty value, Registered compressor warranty, Registered warranty conditions, Registered parts warranty, Warranty notes
Last updated
Jul 23, 2026