SplitAtlas

Daikin / OTERRA R-32

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

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

The Daikin Oterra 18k is the 1.5-ton standard unit: SEER2 21, EER2 12, HSPF2 9.6 on R-32, with 21,600 BTU of heat at 47F and 15,200 BTU at 5F. It brings solid efficiency and Daikin support to a large room in a moderate climate.

1 zoneProfessional installCurrent

Refrigerant generation

R-32 - current-generation refrigerant

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

Get installation quotes
Error Codes
Daikin OTERRA 18,000 BTU R-32 208/230V (FTXF18BVJU9 / RXF18BVJU9)

Image: Daikin

Data completeness: 100%
Last sourced
Aug 8, 2026

SplitAtlas score

7.9 / 10

Methodology
Cooling efficiencyBelow average

(21.0 SEER2) among 18k systems

Heating efficiencyBelow average

(9.6 HSPF2) among 18k systems

Cold-weather performanceBottom quartile

(70.4% heat retained at 5F; 5 F heating floor) among 18k systems

NoiseBottom quartile

(33 dBA indoor min / 54 dBA outdoor) among 18k systems

WarrantyTop 10%

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

Feature setBelow average

(4 verified features) 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

Install difficulty

Professional install
  • Electrical: 208/230V; MCA 21.4 A; breaker/fuse 25 A.
  • Line set: connection type not sourced; precharged 49.25 ft; max 98.5 ft.

Alternatives

Availability and price context

  • Verified current price: $2,820.00 at Amazon; availability in_stock; checked Aug 8, 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
Aug 8, 2026
Page reviewed
Jul 23, 2026
Source-backed records
7
Newest source retrieved
Aug 8, 2026

Warranty tiers

Warranty: 12 years parts and no separate compressor term published if timely registered residential all-parts coverage.

Review methodology

Model context

Structured ratings
Certification: ENERGY STAR certified and AHRI cold-climate designated. Refrigerant: current low-GWP R-32. Minimum heating ambient: 5 F.

Strengths

  • SEER2 21 with 21,600 BTU rated heat at 47F; ENERGY STAR certified.
  • Current R-32 refrigerant; Daikin reliability reputation.

Weaknesses

  • 5F output tapers to 15,200 BTU - the Aurora 18k holds a full 21,600 BTU in deep cold.
  • HSPF2 9.6; professional installation required.

Climate suitability

Minimum heating ambient
5 F[2]
Rated heating at 5F
15,200 BTU/h[3]
Rated heating at 17F
15,200 BTU/h[3]
Rated heating at 47F
21,600 BTU/h[3]

Specifications

Show
Manufacturer
Daikin
Brand
Daikin
Product line
OTERRA R-32
Model number
FTXF18BVJU9 indoor / RXF18BVJU9 outdoor
Indoor unit model
FTXF18BVJU9
Outdoor unit model
RXF18BVJU9
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
21.4 A[1]
Maximum fuse or breaker size
25 A[1]
Breaker needed
not published
SEER2
21 SEER2[3]
EER2
12 EER2[3]
HSPF2 (Region 4)
9.6 HSPF2[3]
HSPF2 (Region 5)
not published
COP
not published
COP at 47F
not published
COP at 5F
2 COP[3]
Minimum outdoor heating temperature
5 F[2]
Minimum outdoor cooling temperature
50 F[2]
Maximum outdoor temperature
122 F[2]
Indoor noise range
minimum 33 dB(A)[2]
Outdoor noise rating
54 dBA[2]
Indoor weight
28 lb[2]
Outdoor weight
113 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
65.625 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
ENERGY STAR certified[4]
AHRI certification number
217005314[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
last seen at Amazon: $2,820.00
Available retailers
Amazon
Manual links
AHRI certificate 217005314, AHRI public detail 217005314, ENERGY STAR exact row lookup for AHRI 217005314, Daikin OTERRA R-32 installation manual, Daikin OTERRA product page, Daikin OTERRA R-32 product brochure, HVACDirect exact search for RXF18BVJU9 / FTXF18BVJU9, Daikin OTERRA R-32 BVJU engineering manual EDUS042405, Daikin PWD DMST WZS limited warranty statement
Specification sheet
Daikin OTERRA R-32 BVJU engineering manual EDUS042405
Last sourced date
Aug 8, 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 on Amazon

Last seen at Amazon: $2,820

Parts and filters

Fits Daikin OTERRA 18,000 BTU R-32 208/230V (FTXF18BVJU9 / RXF18BVJU9). Part numbers and fit notes identify compatibility only; no manufacturer endorsement is implied.

filter-deodorizing

Daikin titanium apatite deodorizing filter without frame

Fits
Daikin OTERRA 18,000 BTU R-32 208/230V (FTXF18BVJU9 / RXF18BVJU9)
OEM part number
KAF970A46
Fit note
Fits FTXF18BVJU9 / RXF18BVJU9. 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 OTERRA R-32 Engineering Data, 13. Options - 13.1 Option List, page p. 169 (Titanium apatite deodorizing filter (without frame) KAF970A46)

wired-controller

Daikin wired remote controller

Fits
Daikin OTERRA 18,000 BTU R-32 208/230V (FTXF18BVJU9 / RXF18BVJU9)
OEM part number
BRC944B2
Fit note
Fits FTXF18BVJU9 / RXF18BVJU9. 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 OTERRA R-32 Engineering Data, 13. Options - 13.1 Option List, page p. 169 (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 OTERRA 18,000 BTU R-32 208/230V (FTXF18BVJU9 / RXF18BVJU9)
OEM part number
BRCW901A03
Fit note
Fits FTXF18BVJU9 / RXF18BVJU9. 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 OTERRA R-32 Engineering Data, 13. Options - 13.1 Option List, page p. 169 (Length 9.8 ft (3 m) BRCW901A03)

control-interface

Daikin wiring adaptor for timer clock or remote controller

Fits
Daikin OTERRA 18,000 BTU R-32 208/230V (FTXF18BVJU9 / RXF18BVJU9)
OEM part number
KRP413BB1S
Fit note
Fits FTXF18BVJU9 / RXF18BVJU9. 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 OTERRA R-32 Engineering Data, 13. Options - 13.1 Option List, page p. 169 (KRP413BB1S)

drain-plug

Daikin outdoor unit drain plug

Fits
Daikin OTERRA 18,000 BTU R-32 208/230V (FTXF18BVJU9 / RXF18BVJU9)
OEM part number
KKP937A4
Fit note
Fits FTXF18BVJU9 / RXF18BVJU9. 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 OTERRA R-32 Engineering Data, 13. Options - 13.1 Option List, page p. 169 (Drain plug KKP937A4)

drain-pan-heater

Daikin outdoor unit drain pan heater

Fits
Daikin OTERRA 18,000 BTU R-32 208/230V (FTXF18BVJU9 / RXF18BVJU9)
OEM part number
KEH064A41
Fit note
Fits FTXF18BVJU9 / RXF18BVJU9. 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 OTERRA R-32 Engineering Data, 13. Options - 13.1 Option List, page p. 169 (Drain pan heater KEH068A41 KEH064A41)
Replacement Parts & Filters

Electrical requirements

Show
Voltage
not published
Voltage range
208/230V[1]
Phase
1[1]
Frequency
60 Hz[1]
MCA
21.4 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
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
11-5/8 x 39-3/8 x 10-3/4 in[2]
Outdoor dimensions
29-1/2 x 34-1/4 x 12-5/8 in[2]
Indoor weight
28 lb[2]
Outdoor weight
113 lb[2]
Drain size
not published

Related systems and guides

Frequently asked questions

Can I install the Daikin OTERRA 18,000 BTU R-32 208/230V (FTXF18BVJU9 / RXF18BVJU9) myself, or do I need a pro?
Daikin OTERRA 18,000 BTU R-32 208/230V (FTXF18BVJU9 / RXF18BVJU9) 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 OTERRA 18,000 BTU R-32 208/230V (FTXF18BVJU9 / RXF18BVJU9) keep heating in a cold winter?
The manufacturer publishes 15,200 BTU/h of heating output at 5F. Rated heating operation extends down to 5 F. Certified heating efficiency is 9.6 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 OTERRA 18,000 BTU R-32 208/230V (FTXF18BVJU9 / RXF18BVJU9) need?
Published electrical requirements: 208/230V voltage, 21.4 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 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 OTERRA 18,000 BTU R-32 208/230V (FTXF18BVJU9 / RXF18BVJU9) 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.: FTXF09BVJU9 & RXF09BVJU9 Daikin OTERRA engineering dataSourced - manufacturer technical document

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

  2. Daikin Comfort Technologies North America, Inc.: Daikin OTERRA 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 217005314 for FTXF18BVJU9 / RXF18BVJU9Sourced - AHRI directory

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

  4. ENERGY STAR: ENERGY STAR exact row for RXF18BVJU9 / FTXF18BVJU9Sourced - Energy Star listing

    Covers Energy Star status

  5. Amazon: Daikin 18,000 BTU 21 SEER2 Oterra Ductless Mini Split Air Conditioner & Heat Pump | R-32 Refrigerant | Single Zone Wall Mounted System | RXF18BVJU9 - FTXF18BVJU9 (B0GYQGPTMR)Sourced - retailer listing

    Covers Retail price

  6. Daikin Comfort Technologies North America, Inc.: Daikin OTERRA product pageSourced - manufacturer product page

    Covers system.lifecycle_status

  7. 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