SplitAtlas

Daikin / ATMOSPHERA R-32

Daikin ATMOSPHERA 18k R-32 208/230V Mini-Split

Certified capacity
18,000 BTU/h[3]
SEER2
22.7 SEER2[3]
Heating floor
-13 F[2]
Voltage
208/230V[1]
Install path
Professional install

The Daikin Atmosphera 18k scales the premium line to 1.5 tons: SEER2 22.7, EER2 12.5, HSPF2 10 on R-32, holding a full 21,600 BTU of heat from 47F down to 5F. It is a strong primary heat source for a large room in a cold climate, with efficiency stepping toward the middle of the pack as capacity rises.

1 zoneProfessional installCurrent

Refrigerant generation

R-32 - current-generation refrigerant

Dealer-installation warranty note

Buying online can keep warranty coverage when a compliant Daikin dealer installs the system; confirm that installation path before purchase.

Installation condition: The unit must be installed by a dealer adhering to all applicable federal, state, and local codes, policies, and licensing requirements.

Dealer path: Daikin dealer or contractor channel with compliant installation; Daikin directs owners to local dealers for quotes, service, and parts.

Paid link

$4,334 / Fresh price - checked Jul 23, 2026

Check price at HVACDirect

This system's warranty depends on licensed installation — get quotes from installers in your area.

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Error Codes
Daikin ATMOSPHERA 18,000 BTU R-32 208/230V (FTXM18WVJU9 / RXM18WVJU9) mini-split heat pump indoor wall unit and outdoor condenser

Image: HVACDirect

Data completeness: 100%
Last sourced
Jul 23, 2026

SplitAtlas score

8.6 / 10

Methodology
Cooling efficiencyAbove average

(22.7 SEER2) among 18k systems

Heating efficiencyBelow average

(10.0 HSPF2) among 18k systems

Cold-weather performanceTop quartile

(100% heat retained at 5F; -13 F heating floor) among 18k systems

NoiseTop 10%

(-49 dBA indoor min / 55 dBA outdoor) among 18k systems

WarrantyTop 10%

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

Feature setBottom quartile

(2 verified features) across the catalogue

Price-to-performanceBottom quartile

($4,334 median retail) among 18k systems

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

Key ratings

Rated cooling

18,000BTU/h[3]

Rated heating

21,600BTU/h[3]

Buyer review snapshot

Best for / skip if

Best for

  • High-efficiency shortlists; SEER2 is 22.7.

Install difficulty

Professional install
  • Electrical: 208/230V; MCA 18.8 A; breaker/fuse 20 A.
  • Line set: connection type not sourced; precharged 49.25 ft; max 98.5 ft.

Alternatives

Availability and price context

  • Verified current price: $4,334.00 at HVACDirect; availability in_stock; checked Jul 23, 2026. Dealer-installation condition: The unit must be installed by a dealer adhering to all applicable federal, state, and local codes, policies, and licensing requirements..

Purchase channel policy

Daikin's warranty policy allows the internet-purchase path when the equipment is installed by a dealer following applicable code, policy, and licensing requirements.

Warranty impact
Warranty coverage is lost for consumer internet purchases only when the dealer-installation exception is not satisfied.
Installation condition
The unit must be installed by a dealer adhering to all applicable federal, state, and local codes, policies, and licensing requirements.
Authorized channel
Daikin dealer or contractor channel with compliant installation; Daikin directs owners to local dealers for quotes, service, and parts.

Buying online can keep warranty coverage when a compliant Daikin dealer installs the system; confirm that installation path before purchase.

Compare online-purchase warranty rules by brand

Source: Daikin Comfort Technologies North America, Inc.: Standard Warranty - Internet Sales Policy for Warranty; retrieved Aug 13, 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: 12 years parts and no separate compressor term published if timely registered residential all-parts coverage.

Review methodology

Model context

Install path
This is professional-install equipment; retail offer context is shown separately from installation labor. Brand purchase-channel policy is shown in the buyer review snapshot.

Strengths

  • Holds a full 21,600 BTU of heat down to 5F - heavy, dependable deep-cold output.
  • SEER2 22.7 with current R-32 refrigerant.
  • Daikin dealer network and reliability reputation.

Weaknesses

  • SEER2 is below the smaller Atmosphera models - the efficiency premium is largest at 9k/12k.

Climate suitability

Minimum heating ambient
-13 F[2]
Rated heating at 5F
21,600 BTU/h[3]
Rated heating at 17F
15,400 BTU/h[3]
Rated heating at 47F
21,600 BTU/h[3]

Specifications

Show
Manufacturer
Daikin
Brand
Daikin
Product line
ATMOSPHERA R-32
Model number
FTXM18WVJU9 indoor / RXM18WVJU9 outdoor
Indoor unit model
FTXM18WVJU9
Outdoor unit model
RXM18WVJU9
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
18.8 A[1]
Maximum fuse or breaker size
20 A[1]
Breaker needed
not published
SEER2
22.7 SEER2[3]
EER2
12.5 EER2[3]
HSPF2 (Region 4)
10 HSPF2[3]
HSPF2 (Region 5)
not published
COP
not published
COP at 47F
not published
COP at 5F
1.75 COP[3]
Minimum outdoor heating temperature
-13 F[2]
Minimum outdoor cooling temperature
14 F[2]
Maximum outdoor temperature
115 F[2]
Indoor noise range
cooling 33-49; heating 32-49 dB(A)[2]
Outdoor noise rating
55 dBA[2]
Indoor weight
33 lb[2]
Outdoor weight
132 lb[2]
Refrigerant
R-32[3]
Refrigerant charge
not published
Manufacturer coverage
not published
Line-set size
1/4 in liquid / 1/2 in suction
Included line-set length
Daikin professional single-zone systems publish field-supplied line sizes and maximum/precharged piping data; no included consumer line set length is published.
Maximum line-set length
98.5 ft[1]
Max line set per indoor
not published
Maximum elevation difference
82 ft[1]
Max height between indoor units
not published
Wi-Fi support
Daikin controller/Wi-Fi support depends on the indoor controls accessory or bundle and was not published as a uniform built-in system fact in the exact engineering row.
Energy Star status
Not ENERGY STAR certified[3]
AHRI certification number
212494259[3]
Warranty
Best case: 12 yr parts / no separate compressor term (timely registered residential all-parts coverage). Registered residential Daikin ductless coverage is up to 12 years all parts when registered on time; commercial coverage is shorter. No separate longer compressor-only term was found in the PWD DMST WZS warranty statement.
Install path
Professional install
Retail price
$4,334.00
Available retailers
HVACDirect
Manual links
AHRI certificate 212494259, AHRI public detail 212494259, ENERGY STAR exact row lookup for AHRI 212494259, Daikin ATMOSPHERA R-32 installation manual, Daikin ATMOSPHERA product page, Daikin ATMOSPHERA R-32 product brochure, HVACDirect exact product page for RXM18WVJU9 / FTXM18WVJU9, Daikin ATMOSPHERA R-32 engineering manual EDUS042208A, Daikin PWD DMST WZS limited warranty statement
Specification sheet
Daikin ATMOSPHERA R-32 engineering manual EDUS042208A
Last sourced date
Jul 23, 2026

Retail purchase context

Dealer-installation warranty note

Buying online can keep warranty coverage when a compliant Daikin dealer installs the system; confirm that installation path before purchase.

Installation condition: The unit must be installed by a dealer adhering to all applicable federal, state, and local codes, policies, and licensing requirements.

Dealer path: Daikin dealer or contractor channel with compliant installation; Daikin directs owners to local dealers for quotes, service, and parts.

Some retailer links may earn us a commission at no extra cost; paid relationships never change scores or recommendations. Affiliate disclosure

Paid link

Dealer-installation warranty note

Buying online can keep warranty coverage when a compliant Daikin dealer installs the system; confirm that installation path before purchase.

Check price at HVACDirect

$4,334 / Fresh price - checked Jul 23, 2026

Parts and filters

Fits Daikin ATMOSPHERA 18,000 BTU R-32 208/230V (FTXM18WVJU9 / RXM18WVJU9). Part numbers and fit notes identify compatibility only; no manufacturer endorsement is implied.

filter-deodorizing

Daikin titanium apatite deodorizing filter without frame

Fits
Daikin ATMOSPHERA 18,000 BTU R-32 208/230V (FTXM18WVJU9 / RXM18WVJU9)
OEM part number
KAF970A46
Fit note
Fits FTXM18WVJU9 / RXM18WVJU9. Manufacturer options list publishes this filter part number; the exact HVACDirect product page found during research was out of stock. No live HVACDirect exact-part offer was found; source through an authorized Daikin dealer with the model and serial number.
Source
Daikin ATMOSPHERA R-32 Engineering Data, 13. Options - 13.1 Option List, page p. 130 (Titanium apatite deodorizing filter (without frame) KAF970A46)

wired-controller

Daikin wired remote controller

Fits
Daikin ATMOSPHERA 18,000 BTU R-32 208/230V (FTXM18WVJU9 / RXM18WVJU9)
OEM part number
BRC944B2
Fit note
Fits FTXM18WVJU9 / RXM18WVJU9. Manufacturer documentation publishes this OEM part number for this model family. HVACDirect was verified as a live exact-part page on 2026-08-01.
Source
Daikin ATMOSPHERA R-32 Engineering Data, 13. Options - 13.1 Option List, page p. 130 (Wired remote controller BRC944B2)

Some retailer links may earn us a commission at no extra cost; paid relationships never change scores or recommendations. Affiliate disclosure

Paid link

Check price at HVACDirect

remote-control-cord

Daikin wired remote controller cord, 9.8 ft

Fits
Daikin ATMOSPHERA 18,000 BTU R-32 208/230V (FTXM18WVJU9 / RXM18WVJU9)
OEM part number
BRCW901A03
Fit note
Fits FTXM18WVJU9 / RXM18WVJU9. Manufacturer documentation publishes this OEM part number for this model family. No live HVACDirect exact-part offer was found; source through an authorized Daikin dealer with the model and serial number.
Source
Daikin ATMOSPHERA R-32 Engineering Data, 13. Options - 13.1 Option List, page p. 130 (Length 9.8 ft (3 m) BRCW901A03)

control-interface

Daikin wiring adaptor for timer clock or remote controller

Fits
Daikin ATMOSPHERA 18,000 BTU R-32 208/230V (FTXM18WVJU9 / RXM18WVJU9)
OEM part number
KRP413BB1S
Fit note
Fits FTXM18WVJU9 / RXM18WVJU9. Manufacturer documentation publishes this OEM part number for this model family. No live HVACDirect exact-part offer was found; source through an authorized Daikin dealer with the model and serial number.
Source
Daikin ATMOSPHERA R-32 Engineering Data, 13. Options - 13.1 Option List, page p. 130 (KRP413BB1S)

drain-plug

Daikin outdoor unit drain plug

Fits
Daikin ATMOSPHERA 18,000 BTU R-32 208/230V (FTXM18WVJU9 / RXM18WVJU9)
OEM part number
KKP937A4
Fit note
Fits FTXM18WVJU9 / RXM18WVJU9. Manufacturer documentation publishes this OEM part number for this model family. No live HVACDirect exact-part offer was found; source through an authorized Daikin dealer with the model and serial number.
Source
Daikin ATMOSPHERA R-32 Engineering Data, 13. Options - 13.1 Option List, page p. 130 (Drain plug KKP937A4)

drain-pan-heater

Daikin outdoor unit drain pan heater

Fits
Daikin ATMOSPHERA 18,000 BTU R-32 208/230V (FTXM18WVJU9 / RXM18WVJU9)
OEM part number
KEH063A4E(A)
Fit note
Fits FTXM18WVJU9 / RXM18WVJU9. Manufacturer options list publishes this accessory for the matching class. No live HVACDirect exact-part offer was found; source through an authorized Daikin dealer with the model and serial number.
Source
Daikin ATMOSPHERA R-32 Engineering Data, 13. Options - 13.1 Option List, page p. 130 (Drain pan heater ★2 KEH094A41E KEH063A4E(A))
Replacement Parts & Filters

Electrical requirements

Show
Voltage
not published
Voltage range
208/230V[1]
Phase
1[1]
Frequency
60 Hz[1]
MCA
18.8 A[1]
Breaker needed
not published
Maximum breaker size
not published
Maximum fuse size
20 A[1]
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
1/2 in[1]
Line connection type
not published
Precharged length
49.25 ft[1]
Included line-set length
Daikin professional single-zone systems publish field-supplied line sizes and maximum/precharged piping data; no included consumer line set length is published.
Maximum line-set length
98.5 ft[1]
Max line set per indoor
not published
Max height between indoor units
not published
Indoor dimensions
11-3/4 x 43-5/16 x 10-13/16 in[2]
Outdoor dimensions
28-15/16 x 34-1/4 x 12-5/8 in[2]
Indoor weight
33 lb[2]
Outdoor weight
132 lb[2]
Drain size
not published

Related systems and guides

Frequently asked questions

Can I install the Daikin ATMOSPHERA 18,000 BTU R-32 208/230V (FTXM18WVJU9 / RXM18WVJU9) myself, or do I need a pro?
Daikin ATMOSPHERA 18,000 BTU R-32 208/230V (FTXM18WVJU9 / RXM18WVJU9) 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 Daikin ATMOSPHERA 18,000 BTU R-32 208/230V (FTXM18WVJU9 / RXM18WVJU9) keep heating in a cold winter?
The manufacturer publishes 21,600 BTU/h of heating output at 5F. Rated heating operation extends down to -13 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 Daikin ATMOSPHERA 18,000 BTU R-32 208/230V (FTXM18WVJU9 / RXM18WVJU9) need?
Published electrical requirements: 208/230V voltage, 18.8 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 98.5 ft, and the included line set comes pre-charged for 49.25 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 Daikin ATMOSPHERA 18,000 BTU R-32 208/230V (FTXM18WVJU9 / RXM18WVJU9) carry?
The manufacturer publishes these warranty tiers: Best case: 12 yr parts / no separate compressor term (timely registered residential all-parts coverage). Registration requirements and proof of qualified installation commonly affect coverage, so read the warranty terms before install day.

Data sources

Show
  1. Daikin Comfort Technologies North America, Inc.: FTXM09WVJU9 & RXM09WVJU9 Daikin ATMOSPHERA engineering dataSourced - manufacturer technical document

    Covers Frequency, electrical_spec.guaranteed_voltage_range, Maximum fuse size, Minimum circuit ampacity, Phase, Voltage range and more

  2. Daikin Comfort Technologies North America, Inc.: Daikin ATMOSPHERA R-32 product brochureSourced - manufacturer technical document

    Covers Indoor dimensions, Indoor noise range, Indoor weight, Outdoor dimensions, Outdoor noise rating, Outdoor weight and more

  3. Air-Conditioning, Heating, and Refrigeration Institute: AHRI public detail 212494259 for FTXM18WVJU9 / RXM18WVJU9Sourced - AHRI directory

    Covers AHRI certification number, performance_spec.cold_climate_designation, Rated cooling capacity, COP at 5F, EER2, Energy Star status and more

  4. Daikin Comfort Technologies North America, Inc.: Daikin ATMOSPHERA product pageSourced - manufacturer product page

    Covers system.lifecycle_status

  5. Daikin Comfort Technologies North America, Inc.: Daikin PWD DMST WZS limited warranty statementSourced - manufacturer technical document

    Covers Best-case compressor warranty status, Best-case warranty conditions, Best-case parts warranty, Legacy compressor warranty value, Legacy warranty value, Warranty notes

Last updated

Jul 23, 2026