Cooper&Hunter
MIA Series 12,000 BTU 21.2 SEER2 115V (CH-NY12MIA-115VI)
The Cooper&Hunter MIA Series 12K (115V) is a value single-zone inverter heat pump rated 21.2 SEER2 on R-454B with built-in WiFi, covering rooms up to about 550 sq ft. The 2026 NG generation moved from R-410A to R-454B.
$900
List priceMIA NG Series 115V full set with 16 ft kit, typical retail June 2026. Current generation uses R-454B.
No live retailer for this exact model right now.
The closest single split you can buy today:
Pioneer Diamante Pro 12,000 BTU High-Wall Series Ductless Mini Split 115VCovers up to 500 sq ft In stock$888View Or look for this exact model on Amazon:
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Will it cool your room?
This unit's cooling matches a 549 sq ft room. Set your room size to check the fit for your space.
Mini-splits are rated on SEER2, a seasonal scale, not the ENERGY STAR annual-kWh figure this dollar estimate is built from, so there is no comparable figure to show here. A blank is missing data, not a worse result: a mini-split is often the more efficient choice.
Installation cost
$2,500-6,000 fully installed for a typical room (the equipment is roughly $700-1,800, professional installation roughly $1,500-4,000+ depending on line-set run, electrical and access). The unit price you see here is hardware only; installation is the larger, separate cost.
A typical range for this system type, for comparison only, not a quote for this unit. The actual price depends on the line-set run, electrical work and access.
What each mini-split size costs todayAt a glance
Best for value single-zone r-454b cooling and heating up to 550 sq ft.
Performance
- Cooling capacity
- 12,000 BTU · 3.5 kW
- Heating capacity
- Yes
- Room coverage
- up to 550 sq ft
- Energy Star
- Yes
- SEER2
- 21.2
- Annual energy (cooling)
- Not published
Noise, size & features
- Model number
- CH-NY12MIA-115VI
- Indoor noise
- 26 dB(A)about as quiet as a whisper
- Outdoor noise
- Not published
- Indoor unit
- 31.57 x 11.69 x 7.44 in
- Outdoor unit
- Yes
- Refrigerant
- R-454B
- Wi-Fi / app
- Yes
- Outdoor unit needed
- Yes
What is good
- Current generation switched to low-GWP R-454B refrigerant
- Built-in WiFi and 115V plug-friendly operation
- Heat pump rated to operate down to 5F
What to watch
- GTIN not published on retailer listings
- Pioneer-style professional evacuation recommended for install
- 10.1 EER / 8.7 HSPF heating efficiency is mid-pack
Installation & the rules that apply
This is a single split. This is where regulation bites. Under EPA Section 608 the refrigerant circuit may only be opened by a certified technician, and the EPA is explicit that this includes connecting or disconnecting the pre-charged line sets sold with "DIY" mini-split kits. No federal law stops you doing the mounting, bracketing and line routing yourself, but handling the refrigerant without certification voids the warranty and is a violation. Most US jurisdictions also require permits for a new outdoor unit: typically mechanical or building for the wall penetration and mount, plus electrical for the dedicated 240 V circuit and disconnect. An HOA nearly always has to approve exterior equipment in advance, and local noise ordinances can cap how loud the condenser may be at the property line. This varies by city and county, so confirm with your building department before buying hardware.
Certified installer
R-454B
Common questions about the Cooper&Hunter MIA Series 12,000 BTU 21.2 SEER2 115V (CH-NY12MIA-115VI)
- How loud is the Cooper&Hunter MIA Series 12,000 BTU 21.2 SEER2 115V (CH-NY12MIA-115VI)?
- 26 dB(A) indoors, about as quiet as a whisper.
- How energy-efficient is the Cooper&Hunter MIA Series 12,000 BTU 21.2 SEER2 115V (CH-NY12MIA-115VI)?
- Its efficiency rating is SEER2 21.2, and it is ENERGY STAR certified.
- What size room does the Cooper&Hunter MIA Series 12,000 BTU 21.2 SEER2 115V (CH-NY12MIA-115VI) cool?
- It is rated to cool a room up to 550 sq ft (12,000 BTU · 3.5 kW).
- Do I need a professional to install the Cooper&Hunter MIA Series 12,000 BTU 21.2 SEER2 115V (CH-NY12MIA-115VI)?
- Yes. As a single split it needs a certified installer. Usually needs permission.
- Does the Cooper&Hunter MIA Series 12,000 BTU 21.2 SEER2 115V (CH-NY12MIA-115VI) heat as well as cool?
- Yes. It also heats.
Is a split even the right type?
Compare splits against the other types on price, noise, efficiency and install.
Buying guides for a single split like this
The questions buyers ask, answered from live prices and real specs. See where a single split like this fits.
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Pioneer
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