Apex Multi

Multi-zone heat pumps. One outdoor system, compatible indoor choices for different spaces.

Outdoor units

Model / nominal size class

OnSpec model: OSAPXM18H2301AO
Number of zones: 2
Refrigerant: R32
Supply: 208-230V / 1 phase / 60Hz

Apex Multi 18K outdoor heat pump — OSAPXM18H2301AO

Rated output and efficiency depend on the outdoor model and the connected ducted, non-ducted or mixed indoor combination. Review the selected outdoor submittal for its rating conditions, connection limits and approved combinations.

Compatible indoor options

Apex wall mount

A silver-finish wall-mounted indoor head for room-level heating and cooling.

9K classOSAPX09H2301AH
12K classOSAPX12H2301AH
18K classOSAPX18H2301AH
24K classOSAPX24H2301AH

9K and 12K options are listed across the outdoor range; 18K requires a 24K or larger outdoor model; 24K requires 30K or larger. Where offered, 30K and 36K indoor units are listed with the 60K outdoor model only. Total connected-capacity limits still apply.

Apex Multi submittals

Outdoor system and indoor-only documents are separated below. Technical tables retain source equipment identifiers for traceability; OnSpec model numbers are shown on each cover.

OnSpec model cross-listings and certification references require confirmation before project use. These are not the Apex single-zone system submittals.

Outdoor units7 PDFs