ACiQ Extreme 18,000 BTU (Low Ambient) vs Senville AURA 18,000 BTU (Cold Climate)

Quick take: The Senville AURA 18,000 BTU (Cold Climate) costs $207 less.

SpecACiQ Extreme 18,000 BTU (Low Ambient)Senville AURA 18,000 BTU (Cold Climate)
Price~$2,297~$2,090
TypeSingle-ZoneSingle-Zone
Capacity18k BTU18k BTU
Coverage~1,000 sq ft~1,000 sq ft
SEER2 (cooling)21.421.4
HSPF2 (heating)1111
Low-Ambient Heatingto -22°Fto -22°F
Max heat at 5°F (NEEP)18,000 BTUnot listed
Heat kept at 5°F100% of rated—
RefrigerantR-454BR-454B
ZonesSingle zoneSingle zone
Voltage230V230V
WiFi ControlBuilt-inBuilt-in
InstallACiQ is Ferguson's house brand and is sold as a professional-install system: the flare lineset is sold separately and the unit needs refrigerant charging and evacuation, so it is not a DIY kit. The 12-year compressor and 7-year parts terms depend on online registration, and R-454B calls for an installer comfortable with A2L refrigerant. A 20 to 25 A breaker and 1/4 in. by 1/2 in. lines are listed.Professional installation is required for the 10-year compressor / 5-year parts warranty, which also needs online registration. The system runs on a 16 to 20 A breaker with a 1/4 in. liquid and 1/2 in. gas lineset sold separately, and an Alexa USB Wi-Fi kit is included.
Warranty12 years compressor / 7 years parts with online registration.10 years compressor / 5 years parts with online registration; professional installation is required for the warranty to be valid.

Pros & cons

ACiQ Extreme 18,000 BTU (Low Ambient)

  • ✓11.0 HSPF2 matches the Senville Aura 18k
  • ✓12-year compressor / 7-year parts with registration
  • ✓AHRI certificate number published
  • ✗About $680 more than the ACiQ Standard 18k
  • ✗Pro install and registration are required for the long warranty
  • ✗Sold through dealers rather than a maker store, so price varies by seller

Senville AURA 18,000 BTU (Cold Climate)

  • ✓11.0 HSPF2 and heating to -22°F for a retailer-sold 18k
  • ✓10-year compressor warranty with registration and pro install
  • ✓Alexa USB kit included for Wi-Fi
  • ✓Energy Star listed by the retailer
  • ✗Lineset is sold separately
  • ✗About $1,120 more than the Senville Leto 18k
  • ✗No certified capacity at 5°F is published, since it has no NEEP listing
  • ✗Warranty requires pro install plus online registration