Heats and coolsR454B
Astoria Pro, Wall mount
Astoria Pro 12K Wall Mount
A person checks this pairing before it ships.
- Ships to all 50 states. If anything arrives damaged, we handle the claim.
- New units from an authorized Cooper & Hunter dealer, with the full factory warranty.
- All sales are final. Not sure about the size? Call (417) 812-0015 before you order.
Rated performance
From the spec sheet on file for model CH-PRO12MASTWM-230VI. Every other figure is in the full spec sheet below.
- Capacity
12,000BTU/h
About 400 to 600 sq ft with 8 ft ceilings
- Efficiency
25.5SEER2
Bar on the catalog's 14 to 28 range
- Sound
22dB(A)
Indoor, lowest fan speed; 36.5 on high
- Airflow
441CFM
Indoor, top fan speed
- Power
208–230V
MCA 3 A, max fuse 15 A
Will it fit? Front and side, to scale
Drawn from the spec sheet’s indoor dimensions, W × D × H.
- Width
- 33.74 in
- Height
- 11.81 in
- Depth
- 9.09 in
- Net weight
- 22.93 lb
Why this head
From the feature list on file for model CH-PRO12MASTWM-230VI.
- Single or Multi-Zone Application
- Humidity Sensor
- Easy access E-Box and PCB
- Easy-to-remove blower wheel
- Auto-Swing for vertical and horizontal louvers
- Smart Kit Included
- Can be installed up to 2” from ceiling
- Compatible with Regular and Hyper Heat Outdoor
Specifications
The full spec sheet
Every value on file for model CH-PRO12MASTWM-230VI, with units.
Capacity
3 values| Nominal capacity | 12,000 | BTU/h |
|---|---|---|
| Rated cooling capacity | 12,000 | BTU/h |
| Rated heating capacity (47°F) | 12,000 | BTU/h |
From the Cooper & Hunter spec sheet, with 2 values from the product listing.
Efficiency
2 values| SEER2 | 25.5 |
|---|---|
| EER2 | 13 |
From the Cooper & Hunter spec sheet.
Electrical
8 values| Voltage | 208/230 | V |
|---|---|---|
| Phase | 1 | ph |
| Frequency | 60 | Hz |
| Operating voltage range | 187 to 253 | V |
| Minimum circuit ampacity (MCA) | 3 | A |
| Maximum fuse / breaker size | 15 | A |
| Indoor/outdoor communication wire gauge | 14 | AWG |
| Indoor/outdoor communication wire conductors | 4 |
From the Cooper & Hunter spec sheet, with 2 values from the product listing.
Refrigerant and piping
4 values| Refrigerant | R-454B | |
|---|---|---|
| Liquid line size | 1/4 | in |
| Suction (gas) line size | 3/8 | in |
| Condensate drain size | 5/8 | in |
From the Cooper & Hunter spec sheet.
Dimensions and weight
8 values| Width | 33.74 | in |
|---|---|---|
| Depth | 9.09 | in |
| Height | 11.81 | in |
| Net weight | 22.9 | lb |
| Shipping width | 36.22 | in |
| Shipping depth | 12.2 | in |
| Shipping height | 14.57 | in |
| Shipping weight | 29.3 | lb |
From the Cooper & Hunter spec sheet.
Sound and airflow
4 values| Indoor sound level (quietest setting) | 18 | dB(A) |
|---|---|---|
| Indoor sound level (highest setting) | 38 | dB(A) |
| Indoor airflow (highest setting) | 441 | CFM |
| Indoor airflow (lowest setting) | 177 | CFM |
From the Cooper & Hunter spec sheet.
Operating range
2 values| Indoor temperature setting, cooling | 60 to 90 | °F |
|---|---|---|
| Indoor temperature setting, heating | 32 to 86 | °F |
From the Cooper & Hunter spec sheet.
Controls and features
2 values| Zones | Single or multi zone |
|---|---|
| Controller | wire controller + remote controller available |
From the Cooper & Hunter spec sheet.
Approved pairings
Outdoor units approved for this head.
This head runs only with a matching outdoor unit. 2 are approved for it by Cooper & Hunter.
| Unit | Size |
|---|---|
 Regular Outdoor 12KCH-RES12-230VO | 12K BTU |
 Hyper Outdoor 12KCH-RHP12-230VO | 12K BTU |
About this unit
What it is and what it needs.
The Cooper & Hunter Astoria Pro 12K Wall Mount is a 12K BTU wall-mounted indoor unit. It needs a matching outdoor unit: 2 single-zone outdoor units are approved for it and listed on this page.
It runs on 208–230 V and uses R454B refrigerant. The matched system is rated SEER2 25.5.
Documents
- Spec sheetCH-RES12-230VO with CH-PRO12MASTWM-230VI(PDF, opens in a new tab)
- Spec sheetCH-RHP12-230VO with CH-PRO12MASTWM-230VI(PDF, opens in a new tab)
- Spec sheetCH-PRO12MASTWM-230VI(PDF, opens in a new tab)
- Owner's manual(R454B) Astoria(PDF, opens in a new tab)
- Controller manualRemote controller Astoria(PDF, opens in a new tab)
- Product leafletAstoria Pro 2025(PDF, opens in a new tab)
- DocumentAstoria Pro Lealfet 2026(PDF, opens in a new tab)
- DocumentNew Smart Kit 2025(PDF, opens in a new tab)
- Document(PDF, opens in a new tab)
Call before you order.Sizing, pairings, line set lengths and rebates.
Monday to Friday, 8 AM to 5 PM Central
We are in Mountain Grove, Missouri.
Send a messageQuestions
Before you order
Anything else, call (417) 812-0015. Monday to Friday, 8 AM to 5 PM Central.
Does this work on its own?
No. An indoor head needs a matching outdoor unit from the approved list above. If you are replacing one head on an existing multi-zone system, match the series and refrigerant of the outdoor unit you already have.
Can I install it myself?
Mounting, wiring and running the line set are within reach of a capable DIYer. The refrigerant connection and vacuum should be done by a licensed HVAC technician in most states, and manufacturer warranties usually require it. We can point you to an installer in your area.
What if I am not sure about the size?
Room size, ceiling height, insulation, windows and sun exposure all change the answer. Call (417) 812-0015 with the room details and we will confirm the BTU rating before you order.
Can I return it?
No. All sales are final, so size it right first: the builder and the sizing guide are free, and a person confirms the pairing on every order. If anything arrives damaged, we handle the claim for you, and defects are covered by the manufacturer warranty.
What refrigerant does it use?
R454B. Match it to any existing equipment or line set you plan to reuse; refrigerants are not interchangeable.
Reviews
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No reviews for this unit yet.
We publish reviews from verified orders only. Buyers are invited to write one after delivery, and a person reads each review before it appears here.
Not sure about the size? Check it in the builder.
The builder sizes each room and shows only approved Cooper & Hunter systems. All sales are final, so size it right first.
Monday to Friday, 8 AM to 5 PM Central