Soleus Air · Model WS5-12HW-301
12,000 BTU Saddle Window Air Conditioner w/Heat
A window air conditioner rated at 12,000 BTU for rooms up to 550 sq ft. It heats in winter too and self-installs in a window.
$759.99
Live price at SylvanePrice checked Oct 8, 2026
compare.ac may earn a commission on purchases, at no cost to you. It never changes the price you pay or how we rank units.
Will it cool your room?
This unit's cooling matches a 550 sq ft room. Set your room size to check the fit for your space.
At a glance
Best for renters and rooms where you cannot install a fixed unit.
Performance
- Cooling capacity
- 12,000 BTU · 3.5 kW
- Heating capacity
- Yes
- Room coverage
- up to 550 sq ft
- Energy Star
- Not published
- CEER
- Not published
- Annual energy (cooling)
- Not published
Noise, size & features
- Model number
- WS5-12HW-301
- Indoor noise
- 38 dB(A)about as loud as a quiet library
- Outdoor noise
- Not published
- Indoor unit
- Not published
- Outdoor unit
- None
- Refrigerant
- R-32
- Wi-Fi / app
- Not published
- Outdoor unit needed
- No
- Power supply
- 115 V, NEMA 5-15P plug
- Warranty
- 1-Year Limited Warranty
Supply voltage, plug, refrigerant and warranty are from Sylvane's published specifications for this exact configuration, checked Oct 2, 2026.
What is good
- At 38 dB(A) it is quieter than 79 of the 81 other window units we list that publish a noise figure.
- Heats as well as cools, which 31 of the 151 window units we list offer.
- Uses R-32 (GWP 675), the low-GWP class new US residential equipment moved to.
What to watch
- At $760 it costs more than 30 of the 31 other 12,000-14,000 BTU window units we list with a live price.
Installation & the rules that apply
This is a window unit. No EPA Section 608 technician is needed: the refrigerant circuit is factory-sealed and never opened. A plug-in window unit needs no permit, so the friction is with your building rather than the government. Many HOAs restrict window units on appearance grounds, though an HOA regulating how you mount one stands on much firmer ground than one banning cooling outright. Landlords can set conditions, and the falling hazard is taken seriously: New York City, for instance, requires window units to be supported by brackets or mounting rails, and many building insurers and HOAs now require a bracket regardless of city.
Self-fit, no pro needed
R-32
Common questions about the Soleus Air 12,000 BTU Saddle Window Air Conditioner w/Heat
- How loud is the Soleus Air 12,000 BTU Saddle Window Air Conditioner w/Heat?
- 38 dB(A) indoors, about as loud as a quiet library.
- What size room does the Soleus Air 12,000 BTU Saddle Window Air Conditioner w/Heat 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 Soleus Air 12,000 BTU Saddle Window Air Conditioner w/Heat?
- No. It is a window unit you can fit yourself, no professional needed. Usually no permit.
- Does the Soleus Air 12,000 BTU Saddle Window Air Conditioner w/Heat heat as well as cool?
- Yes. It also heats.
Is a window even the right type?
Compare windows against the other types on price, noise, efficiency and install.
Buying guides for a window unit like this
The questions buyers ask, answered from live prices and real specs. See where a window unit like this fits.
More Soleus Air Saddle models
Soleus Air
10,000 BTU Saddle Window Air Conditioner w/Heat
A window air conditioner rated at 10,000 BTU for rooms up to 475 sq ft. It heats in winter too and self-installs in a window.
$659
at Sylvane
Soleus Air
8,000 BTU Saddle Wi-Fi Enabled Window Air Conditioner
A window air conditioner rated at 8,000 BTU. It self-installs in a window and connects to Wi-Fi for app control.
$610
Self-fit, no pro needed
Soleus Air
WS4-08EW-301 Saddle
8,000 BTU Soleus Air saddle window AC (EER 12.0) with a tool-free over-the-sill install and WiFi voice control for rooms up to 350 sq ft, a fixed-speed alternative to inverter U-shaped units.
$610
Self-fit, no pro needed