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Perfect Aire / Perfect Aire Quick Connect

Perfect Aire Quick Connect 18k R-454B 230V Mini-Split

Certified capacity
18,000 BTU/h[3]
SEER2
21 SEER2[3]
Heating floor
-4 F[1]
Voltage
230 V[1]
Install path
DIY install

The Quick Connect 18k is the DIY 1.5-ton head, on 230V and R-454B at 21 SEER2, a strong 12.95 EER2, and 10 HSPF2. Its defining trait is a dead-flat heating curve: 18,000 BTU at 47F, 17F, and 5F alike, so capacity never sags in the cold. It is ENERGY STAR certified and cold-climate designated, with precharged quick-connect linesets for self-installation.

1 zoneDIY installCurrent

Refrigerant generation

R-454B - current-generation refrigerant

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Error Codes
Perfect Aire Quick Connect 18,000 BTU R-454B 230V (4PAMSHQCW18 / 4PAMSHQCO18)

Image: Perfect Aire

Data completeness: 100%
Last sourced
Aug 17, 2026

SplitAtlas score

8.6 / 10

Methodology
Cooling efficiencyBelow average

(21.0 SEER2) among 18k systems

Heating efficiencyBelow average

(10.0 HSPF2) among 18k systems

Cold-weather performanceTop quartile

(100% heat retained at 5F; -4 F heating floor) among 18k systems

WarrantyBelow average

(7 yr parts / 7 yr compressor) across the catalogue

Installation accessibilityAbove average

(DIY-marketed; 25 ft precharged; 25 ft included line set) across the catalogue

Feature setTop quartile

(6 verified features) across the catalogue

Documentation & partsBelow average

(7 manuals; spec sheet) across the catalogue

Key ratings

Rated cooling

18,000BTU/h[3]

Rated heating

18,000BTU/h[3]

Best-fit use cases

Well suited to a large room or open area in a cold climate where a DIY-inclined owner wants full, unwavering heat and has a 230V circuit ready.

Where this system ranks

Buyer review snapshot

Install difficulty

DIY install path, electrical work likely
  • Electrical: 230V; breaker/fuse 20 A.
  • Line set: Quick-connect line connections; precharged 25 ft; included 25 ft.

Alternatives

Availability and price context

We could not verify a current retail price for this model. We could not find a published consumer price for this model when we last checked on 2026-08-17.

Source date

Model data sourced
Aug 17, 2026
Page reviewed
Jul 27, 2026
Source-backed records
4
Newest source retrieved
Aug 17, 2026

Warranty tiers

Warranty: 7 years parts and compressor as standard.

Review methodology

Model context

Structured ratings
Certification: ENERGY STAR certified and AHRI cold-climate designated. Refrigerant: current low-GWP R-454B. Minimum heating ambient: -4 F.

Strengths

  • Perfectly flat 18,000 BTU heat from 47F down to 5F - no cold-weather derating at all.
  • Strong 12.95 EER2 and cold-climate + ENERGY STAR certification for a value unit.
  • Precharged DIY linesets bring 1.5-ton capacity within reach of a skilled homeowner.

Weaknesses

  • A larger self-install means longer linesets to route carefully and a dedicated 230V circuit.
  • Value-brand support footprint is thinner than premium cold-climate names.

Climate suitability

Minimum heating ambient
-4 F[1]
Rated heating at 5F
18,000 BTU/h[3]
Rated heating at 17F
18,000 BTU/h[3]
Rated heating at 47F
18,000 BTU/h[3]

Specifications

Show
Manufacturer
Perfect Aire
Brand
Perfect Aire
Product line
Perfect Aire Quick Connect
Model number
4PAMSHQCW18 indoor / 4PAMSHQCO18 outdoor
Indoor unit model
4PAMSHQCW18
Outdoor unit model
4PAMSHQCO18
Number of zones
1
Max indoor units
not published
Rated cooling capacity
18,000 BTU/h[3]
Rated heating capacity
18,000 BTU/h[3]
Voltage
230 V[1]
MCA
not published - manufacturer specifies 20 A breaker
Maximum fuse or breaker size
20 A[1]
Breaker needed
20 A[1]
SEER2
21 SEER2[3]
EER2
12.95 EER2[3]
HSPF2 (Region 4)
10 HSPF2[3]
HSPF2 (Region 5)
not published
COP
not published
COP at 47F
not published
COP at 5F
1.9 COP[3]
Minimum outdoor heating temperature
-4 F[1]
Minimum outdoor cooling temperature
5 F[1]
Maximum outdoor temperature
115 F[1]
Indoor noise range
No published indoor sound rating
Outdoor noise rating
No published outdoor sound rating
Indoor weight
33 lb[1]
Outdoor weight
97 lb[1]
Refrigerant
R-454B[3]
Refrigerant charge
not published
Manufacturer coverage
not published
Line-set size
1/4 in liquid / 1/2 in suction
Included line-set length
25 ft[1]
Maximum line-set length
No published maximum line-set length
Max line set per indoor
not published
Maximum elevation difference
No published maximum elevation
Max height between indoor units
not published
Wi-Fi support
supported[1]
Energy Star status
ENERGY STAR certified[4]
AHRI certification number
216498646[3]
Warranty
Standard: 7 yr parts / 7 yr compressor (published parts/compressor warranty). 7-year parts/compressor warranty
Install path
DIY install
Retail price
We could not find a published consumer price for this model when we last checked on 2026-08-17.
Available retailers
not published
Manual links
AHRI public directory record 216498646, ENERGY STAR exact check 216498646, 18,000 BTU Quick Connect Mini-Split Single-Zone System with Indoor & Outdoor Units, Line Set - 230V, R454B refrigerant Perfect Aire product page, Perfect Aire Quick Connect product page excerpts, Perfect Aire 4PAMSHQC09 owner manual snapshot, HVACDirect exact search 4PAMSHQC18, 4PAMSHQC18 Perfect Aire product-page specifications
Specification sheet
4PAMSHQC18 Perfect Aire product-page specifications
Last sourced date
Aug 17, 2026

Electrical requirements

Show
Voltage
230 V[1]
Voltage range
230V[1]
Phase
1[1]
Frequency
60 Hz[1]
MCA
not published - manufacturer specifies 20 A breaker
Breaker needed
20 A[1]
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
Quick-connect line connections[2]
Precharged length
25 ft[1]
Included line-set length
25 ft[1]
Maximum line-set length
No published maximum line-set length
Max line set per indoor
not published
Max height between indoor units
not published
Indoor dimensions
42.75 x 9.50 x 12.50 in[1]
Outdoor dimensions
34 x 12.25 x 25.75 in[1]
Indoor weight
33 lb[1]
Outdoor weight
97 lb[1]
Drain size
not published

Related systems and guides

Frequently asked questions

Can I install the Perfect Aire Quick Connect 18,000 BTU R-454B 230V (4PAMSHQCW18 / 4PAMSHQCO18) myself, or do I need a pro?
Perfect Aire Quick Connect 18,000 BTU R-454B 230V (4PAMSHQCW18 / 4PAMSHQCO18) is sold as a DIY-installable system with a pre-charged 25 ft line set, so no refrigerant handling or vacuum pump is required for a standard install. The electrical circuit is the part that is not DIY: plan on a licensed electrician for the dedicated circuit, and check whether your local permit office requires a permit for the install.
Will the Perfect Aire Quick Connect 18,000 BTU R-454B 230V (4PAMSHQCW18 / 4PAMSHQCO18) keep heating in a cold winter?
The manufacturer publishes 18,000 BTU/h of heating output at 5F. Rated heating operation extends down to -4 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 Perfect Aire Quick Connect 18,000 BTU R-454B 230V (4PAMSHQCW18 / 4PAMSHQCO18) need?
Published electrical requirements: 230 V voltage, not published - manufacturer specifies 20 A breaker 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 No published maximum line-set length, and the included line set comes pre-charged for 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 Perfect Aire Quick Connect 18,000 BTU R-454B 230V (4PAMSHQCW18 / 4PAMSHQCO18) carry?
The manufacturer publishes these warranty tiers: Standard: 7 yr parts / 7 yr compressor (published parts/compressor warranty). Registration requirements and proof of qualified installation commonly affect coverage, so read the warranty terms before install day.

Data sources

Show
  1. Perfect Aire: Perfect Aire Quick Connect single-zone product documentationSourced - manufacturer product page

    Covers Breaker needed, Frequency, Maximum fuse size, Phase, Voltage, Voltage range and more

  2. Perfect Aire: Perfect Aire Quick Connect single-zone product documentationSourced - manufacturer product page

    Covers Line connection type

  3. AHRI certificate #216498646 - search the AHRI DirectorySourced - 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 check for AHRI 216997533Sourced - Energy Star listing

    Covers Energy Star status

Last updated

Jul 27, 2026