ACiQ has 3 systems in the catalog, priced from ~$1,615 to ~$3,350. The one that keeps heating coldest is the ACiQ Extreme 18,000 BTU (Low Ambient) (rated to -22°F). The cheapest way in is the ACiQ Standard 18,000 BTU at ~$1,615.
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.
ACiQ · Multi-Zone
~$3,350
Two large rooms where each needs an 18k head and the buyer wants a long registered compressor warranty at a low price.