This is a wall-sleeve heat pump air conditioner and heater for hotel rooms, apartments, additions, or offices where central ductwork isn't available. It's built for property managers and homeowners who need self-contained, per-room heating and cooling with backup electric heat for cold-snap days.
The PMH123J35AXXX is a DigiAIR-series packaged terminal heat pump (PTHP) built for hospitality rooms, multifamily units, and additions that need per-room heating and cooling without ductwork. It runs on a 230/208V circuit, delivers 11,400/11,200 BTU/h cooling, and pairs a heat-pump compressor with a 3.5/3.0 kW electric heat strip for backup heat below the heat pump's effective range. The unit meets or exceeds ASHRAE 90.1. Note: If you would like to review the manufacturer Product Specifications, Warranty, Brochure, etc., for this system, please refer to the "Resources (System Manuals and Warranty)" Tab above on this page.
Critical Fit & Power Requirements
- Wall Sleeve: Fits the industry-standard 42 in wide x 16-1/16 in high wall sleeve opening. Wall Sleeve is NOT included and must be ordered separately (e.g., WS900E / WS900QW family).
- Exterior Architectural Grille: Sold separately. Not included with this unit or with the sleeve.
- Voltage: 230/208V. Operating range is 197V minimum to 253V maximum. Not compatible with 115V circuits.
- Amperage/Circuit: With electric heat installed, Minimum Circuit Ampacity is 19.5A; Maximum Overcurrent Protection (breaker) is 20A.
- Power Cord/Plug: Factory-installed LCDI power cord (UL 484) terminating in a NEMA 6-20P plug.
- Not compatible with 265V circuits. This unit does not use, and should not be paired with, the Amana 265V sub-base (PTSB4**E) or hard-wire kit (PTPWHWK4 / PSHW04A disconnect). The 265V commercial sibling of this chassis is sold separately as PMH124J.
- Not a drop-in fit for non-standard or custom sleeve openings; confirm existing opening dimensions before ordering as a replacement unit.
The technical friction on PTHP replacements is almost always the wall sleeve, not the chassis. Existing sleeves in older properties are frequently level or even pitched inward, and the factory-cord's 6-20P plug gets swapped for whatever receptacle a previous contractor had on hand. Both of these get missed during a phone-quote and show up as a return or a callback.
On the sleeve: confirm it's pitched approximately 1/4 bubble toward the exterior wall using a torpedo level before setting the chassis. That slight outward pitch is what keeps condensate draining off the sleeve base and out through the drain kit (DK900D for WS900E, DK900QW for WS900QW) instead of pooling and wicking into the interior drywall over a cooling season.
On the plug: verify the wall receptacle is a matching 6-20R against a NEMA receptacle chart before ordering. This unit's total amp draw with heat (15.5/14.1A) and 19.5A MCA require the 20A-rated 6-20 configuration — do not force-fit into a 5-20 or 6-15 receptacle.
Property managers replacing units unit-by-unit across a hospitality property should document sleeve pitch and receptacle type per room during the same site visit as the model swap-out, consistent with NEC receptacle-rating requirements and standard PTAC turnover practice.
Key Benefits
- Heat pump operation (10,600/10,400 BTU/h heating) supplements the 3.5/3.0 kW electric heat strip, reducing electric-resistance heat runtime in moderate outdoor temperatures.
- EER of 11.3/11.5 and COP of 3.3/3.3 for cooling and heat-pump heating efficiency respectively.
- Built-in fresh air ventilation (25-35 CFM) for make-up air without a separate ERV/HRV.
- R-32 refrigerant.
- Single-stage 3.5/3.0 kW electric heat backup engages automatically when heat-pump capacity alone can't meet setpoint.
- Meets or exceeds ASHRAE 90.1 efficiency standards.
| Spec | Value | Unit |
|---|---|---|
| System Type | PTHP (Packaged Terminal Heat Pump) | — |
| Voltage | 230/208 | V |
| Cooling Capacity (230V/208V) | 11,400/11,200 | BTU/h |
| Compressor Cooling Amps | 6.7/6.7 | A |
| Compressor Cooling Watts | 1,005/970 | W |
| EER | 11.3/11.5 | — |
| Heat Pump Heating Capacity (230V/208V) | 10,600/10,400 | BTU/h |
| Heating Amps (Compressor) | 6.7 | A |
| Heating Watts (Compressor) | 940/920 | W |
| COP | 3.3/3.3 | — |
| CFM Cooling | 291/293 | CFM |
| CFM Heating | 320/323 | CFM |
| Fresh Air CFM | 25-35 | CFM |
| Electric Heat Strip Size | 3.5/3.0 | kW |
| Electric Heat Stages | 1 | — |
| Electric Heat Output (230V/208V) | 12,000/9,900 | BTU/h |
| Total Watts w/ Electric Heat | 3,570/2,935 | W |
| Total Amps w/ Electric Heat | 15.5/14.1 | A |
| Minimum Circuit Ampacity (MCA) | 19.5 | A |
| Maximum Overcurrent Protection (MOP) | 20 | A |
| NEMA Plug Type | 6-20P | — |
| Power Cord | Factory LCDI cord, UL 484 | — |
| Refrigerant Type | R-32 | — |
| Wall Sleeve Dimensions | Standard 42 x 16-1/16 | in |
| Wall Sleeve Included | Not Included | — |
| Exterior Architectural Grille Included | Not Included | — |
Note: See "Resources (System Manuals and Warranty)" Tab above for full specifications.
Compatibility & Fitment
- Compatible with 230/208V circuits via a factory-installed NEMA 6-20P plug; operating voltage range 197V-253V.
- Fits industry-standard 42 in x 16-1/16 in wall sleeve openings (e.g., Amana WS900E / WS900QW sleeve family).
- Not compatible with 115V circuits.
- Not compatible with 265V circuits and does not use the Amana 265V sub-base (PTSB4**E) or hard-wire kit (PTPWHWK4 with PSHW04A disconnect). The 265V commercial sibling chassis is sold separately as PMH124J.
- Wall Sleeve is NOT included — order separately.
- Exterior Architectural Grille is NOT included — order separately.
- Not a drop-in fit for non-standard or custom sleeve openings.
Compliance & Environment
| Attribute | Value |
|---|---|
| Refrigerant Type | R-32 |
| Efficiency Standard | Meets or exceeds ASHRAE 90.1 |
| Power Cord Compliance | Factory LCDI cord, UL 484 (applies to units under 250V) |
| Overcurrent Protection | Sized per MOP rating on nameplate/spec table (20A this configuration) |
FAQ
Is the wall sleeve included with this unit?
No. The wall sleeve is sold separately. This chassis fits the industry-standard 42 in wide x 16-1/16 in high wall sleeve opening (e.g., Amana WS900E / WS900QW family), but the sleeve and exterior architectural grille both ship separately from the unit.
What breaker size and plug type does this unit require?
With the 3.5/3.0 kW electric heat strip installed, this unit has a Minimum Circuit Ampacity of 19.5A and requires a Maximum Overcurrent Protection (breaker) of 20A. It ships with a factory-installed 6-20P power cord and LCDI device per UL 484.
Can this be hardwired for 265V commercial applications?
No. This PMH123J35AXXX unit is a 230/208V model. It is not rated for 265V and does not use the Amana sub-base (PTSB4**E) or hard-wire kit (PTPWHWK4 with PSHW04A disconnect) required for 265V applications. The 265V commercial version of this chassis is sold as the PMH124J.
Does this require a licensed electrician or HVAC professional to install and keep the warranty valid?
Refer to the manufacturer installation and warranty documentation in the Resources tab for licensing requirements specific to your jurisdiction and property type. MSSD recommends licensed electrical and HVAC installation for all PTAC/PTHP equipment regardless of warranty terms.
Will this fit a standard 42-inch by 16-inch wall sleeve opening?
Yes. This chassis is designed for the industry-standard 42 in x 16-1/16 in wall sleeve opening. It is not a drop-in fit for non-standard or custom sleeve openings.
Warranty & Registration
Manufacturer badge documentation confirms a 1-Year Repair/Replace warranty and a 5-Year Parts Limited Warranty on this chassis. Full terms, including any distinction between residential and commercial hospitality usage limits, are set out in the warranty PDF in the "Resources (System Manuals and Warranty)" Tab above — refer there before purchase if warranty terms are a deciding factor for a hospitality or multifamily rollout. Ask us before you order if you're unsure this is the right configuration for your property; we always reply back.
