ACiQ · Multi-Zone
ES-27Z-M4C + 2x ACIQ-18W-HH-MD
~$3,350approximate retailer price at last check, equipment only
Best forTwo large rooms where each needs an 18k head and the buyer wants a long registered compressor warranty at a low price.
ACiQ is a dealer house brand, and this is its 2-zone Standard series: a 27,000 BTU condenser with two 18k wall heads for about $3,350. The AHRI record for the non-ducted combination is 25.0 SEER2 and 9.5 HSPF2, and the unit is rated to heat down to -13°F. NEEP lists 19,000 BTU/h at 5°F from a 27,000 BTU/h rating, about 70%. Two 18k heads total 36,000 BTU on a 27,000 BTU condenser, a connection ratio of 133%, so each head will deliver less than its nameplate when both are calling. The same ES-27Z condenser hardware is also certified under the 1HVAC, DIYCOOL and PolarWave names, so shop by model number. The long registered warranty is the draw at this price.
At 5°F it still makes 70% of its rated heat, according to the certified NEEP listing for this pairing. ACiQ rates it to keep running down to -13°F.
Pairing: ES-27Z-M4C with non-ducted heads. Checked October 8, 2026 on NEEP's ccASHP list; a different head or condenser posts different numbers.
Two 18k heads on a 27,000 BTU condenser. It suits two large rooms or open areas rather than small bedrooms.
NEEP lists 27,000 BTU at 47°F and 19,000 BTU at 5°F, about 70%, with COP 2.0. The maker rates it to -13°F and it is ENERGY STAR cold climate listed. SEER2 is 25.0 and HSPF2 9.5.
Yes. The 12-year compressor and 7-year parts terms apply only with online registration, and the system is sold for licensed installation.
No, it is a licensed-installer job. Each head has its own precharged R-454B lineset in 15, 25, 30, 35 or 50 ft lengths, but flared connections and a vacuum pull are needed.
ACiQ · Single-Zone
~$2,297
Cold-climate homeowners working with a contractor who stocks Ferguson and wants the longest compressor warranty at this price.
ACiQ · Single-Zone
~$1,615
Homeowners using a contractor who wants a long warranty and strong efficiency from a 1.5-ton head in a cool, not extreme, climate.
Senville · Multi-Zone
~$3,180
A four-room home in a cold climate that wants the lowest price and can wait on stock.