★★★★★
“Super easy
As advertised. easy install, great communication, super efficient. Very happy with my purchase of this unit.”
via
Judge.me
Airspool WS12 Solar/Hybrid Window Air Conditioner (12,000 BTU)
Window installation
No line set, no wall penetration, and no outdoor unit. Set the WS12 in a compatible window, secure it, and plug it in.
Cooling only
The WS12 is purpose-built for efficient solar-powered air conditioning. If you need heating too, move to the MS or HS mini-split lineup.
Coverage
12,000 BTU of cooling is typically a good fit for rooms and open areas around 500 square feet, depending on insulation and climate.
Power options
Run on solar, grid, or hybrid mode. The unit prioritizes solar whenever it is available and automatically fills in with grid power when needed.
120V standard outlet
The WS12 plugs into a normal household outlet, so there is no special electrical work required to get started.
The easiest path to solar air conditioning. The Airspool WS12 is the world's first solar-powered window AC — 12,000 BTU of cooling that runs on solar, grid, or both. No holes to drill, no line sets to run, no outdoor unit to mount. Just set it in your window, plug it in, and connect solar panels if you want. It's solar AC for everyone.
- No installation — just place in your window and plug in
- Runs on solar, grid, or both (solar always prioritized)
- Inverter compressor — twice as efficient as standard window units
- Variable speed: 25%, 50%, 75%, or 100% power
- 365 Day "Buy and Try" Guarantee + 5-Year Full Guarantee
- Plugs into any standard 110/115/120V outlet (15-amp)
- Intuitive touch-to-control interface + remote + app
★★★★★
“WOW! 20 years off grid in Az and finally have Air Conditioning!
Amazing setup.. Thissystem is nuts.. Gonna save on propane heating in the winter as well.. Thank you, Dave!”
via
Judge.me
Meet the Airspool WS12
The WS12 is solar air conditioning made simple. No mini-split complexity, no HVAC installation, no line sets, no outdoor units. Just a single window unit with Airspool's solar/hybrid technology inside.
During the day, plug in your solar panels and cool your space for free. At night or on cloudy days, it automatically switches to grid power. Or run it on grid alone — at 15 CEER (roughly 17 SEER2 equivalent), it's still about twice as efficient as a typical window unit.
Perfect for renters, apartments, workshops, cabins, or anyone who wants the benefits of solar AC without drilling a single hole.
Operating Modes
Grid Power Only
Plug your WS12 into any standard 120V outlet and enjoy high-efficiency cooling. No solar required.
Solar Power Only
Connect approximately 1,800 watts of solar panels and cool your space for free during sunny hours.
Hybrid Grid/Solar
Your WS12 seamlessly blends solar and grid power so you never lose comfort. Solar is prioritized, and grid power automatically fills in as needed.
The Simplest Way to Go Solar
Mini-splits are incredible — and if you're ready for a permanent installation with heating and cooling, we strongly recommend them. But not everyone needs (or can install) a mini-split.
The WS12 is for everyone else.
Window Unit vs. Mini-Split: When Each Makes Sense
Choose the WS12 Window Unit if...
- You're renting and can't drill holes
- You want cooling only (no heating needed)
- You want zero installation — just set it in a window
- You want a lower upfront cost
- You need a portable solution you can take when you move
- You want to test solar AC before committing to a mini-split
Choose a Mini-Split (MS12/HS12) if...
- You want both heating AND cooling
- You want whisper-quiet operation
- You want higher efficiency (22+ SEER2)
- You want a permanent, built-in solution
- You don't want to sacrifice any window space
- You live in a cold climate (HS12/HS24 for heating)
💡 Many customers start with the WS12 to experience solar AC, then upgrade to a mini-split later. Either way, you're making a great choice — and both are backed by the same 5-year guarantee.
High-Efficiency Cooling
With or without solar panels connected
Frosty Cooling
That's roughly twice the efficiency of a standard window unit. When running on solar alone — infinite efficiency.
Variable Speed Control
Unlike traditional window units that are either ON or OFF, the WS12 features an inverter compressor with four speed settings:
- 25% — Ultra-quiet, gentle cooling for mild days
- 50% — Comfortable, efficient cooling for most conditions
- 75% — Strong cooling for hot afternoons
- 100% — Maximum power for the hottest days
Lower speeds use less energy, which means your solar panels go further and your electricity bill stays lower.
3 Ways to Control Your WS12
The WS12 gives you three ways to take control:
- Touch-to-control interface — built right into the unit. Intuitive and instant.
- Remote control — included with batteries for across-the-room adjustments.
- The Airspool app — schedule, set temperatures, choose your speed, and monitor your solar vs. grid power usage in real time from anywhere in the world.
Watch your electricity savings add up day by day as the app tracks exactly how much power comes from solar vs. grid.
Download the Airspool App
Airspool WS12 Specs at a Glance
| Feature | Details |
|---|---|
| Capacity | 12,000 BTU cooling — ideal for around 500 sq ft |
| Function | Cooling only (no heating) |
| Efficiency | 15 CEER (~17 SEER2 equivalent when on grid) · Infinite efficiency on solar alone |
| Power | 110/115/120V, 15-amp — any standard household outlet |
| Compressor | Inverter (variable speed: 25%, 50%, 75%, 100%) |
| Noise Level | 55 dB indoors (vs. 42.5 dB for MS12/HS12 mini-splits in turbo mode) |
| Solar Input | Around 1,800 watts recommended (80-380V input) · No batteries or inverters needed |
| Dimensions | 24.8" D × 18.9" W × 15" H |
| Minimum Window Size | 24" wide × 36" high (23.5" wide × 16" high opening) |
| Condensate | Slinger ring — evaporates condensate on outdoor coil (no hose needed) |
| Weight | Around 75 lbs (estimated) |
| Controls | Touch interface + Remote + Airspool App |
| Modes | Solar-only · Grid-only · Hybrid (auto-switch) |
| Certifications | ENERGY STAR, ETL, UL (as applicable) |
| Specification | Unit | Value |
|---|---|---|
| General | ||
| BTUs | 12K | |
| Normal Coverage Area | Square Meters / Square Feet | 46.45 / 500 |
| Power Supply AC | (Volts/Phase/Hz) | AC110-120/1/60 |
| Solar Input | ||
| PV (Photovoltaic) Target Power Total | Watts | +/- 1,800 |
| PV (Photovoltaic) Potential Range | Voc (open-circuit voltage from the back of the panels) | DC 75 - 380 |
| String Input - Max PV (DC) Input Current | amps | 15.0 |
| String Input - Max PV Isc | amps | 22.0 |
| Number of Allowable Solar Strings | 1.0 | |
| Capacity | ||
| Cooling | btu/h | 12000.0 |
| Heating | btu/h | n/a (no heat for this model) |
| Moisture Removal | ||
| Moisture Removal | l/hr. / pints/hr. | 1.25 / 2.65 |
| Electric Data | ||
| Cooling Power Input | watts | 1150.0 |
| Rated Current (cooling) | amps | 10.2 |
| Performance | ||
| CEER | 15.0 | |
| EER | 10.4 | |
| Fan And Air | ||
| Fan Speed - High/Medium/Low | rpm | 1,350/1,250/1,150 |
| Air Flow - High/Medium/Low | cfm / m3/hr. | 294/265/235 / 500/450/400 |
| Sound Pressure Noise Level | dB(A) | 56.0 |
| Dimensions | ||
| Net (W x H x D) | mm / inches | 630x380x483 / 24.8x14.96x18.98 |
| Packaging (W x H x D) | mm / inches | 704x430x561 / 27.71x16.93x22.09 |
| Weight | ||
| Net/Gross | kg / lbs | 30/35 / 66.14/77.16 |
| Piping | ||
| Design Pressure | PSIG Kg/cm2 | <610 <42.89 |
| Refrigerant (R32) | kg / ounces | 1.64 / 57.85 |
| Refrigerant Precharge | kg / ounces | .48 / 16.93 |
| Operating Temperature | ||
| Outdoor Temp | c / f | 10 - 55 / 50 -131 |
| Indoor Temp | c / f | 16.11 - 32.22 / 61 - 90 |
What's Included with Your WS12
Everything you need:
- WS12 window unit (12,000 BTU) with intuitive touch-to-control interface
- 110/115/120V 15-amp indoor power cord with plug
- Self-adhesive foam gasket insulation strip
- Remote control (with batteries)
- MC4 disconnect tool
- Clear English installation instructions
- Pre-tested on solar, grid, and hybrid modes before shipping
Solar Bonus Kit (included)
Solar whips — prewired to your unit (4 ft, $18.90 value), DC isolator box ($33.60 value), and 10m of solar wire — correctly sized for your unit ($45.65 value).
💡 No condensate hose needed. The WS12 uses a slinger ring to evaporate condensate on the outdoor coil — which also increases efficiency through evaporative cooling. One less thing to deal with.
Backed by Dave's Double Guarantee
Like every purchase you make with Airspool, your WS12 is backed by two industry-leading guarantees.
365 Day "Buy and Try" Guarantee
Take a full year to make sure your Airspool system is right for you. For any reason — or no reason at all — you can return it within 365 days for a full refund, and we'll even cover the shipping back to us.
We want to take all the risk off your shoulders so you know you're making a good decision with Airspool.
5 Year Guarantee
Your comfort shouldn't come with fine print. For five full years after purchase, we'll make sure your unit keeps running like new. That means we cover all parts and labor.
Your New WS12 Shipped
Here's what to expect when we ship your WS12.
The package you'll receive
You'll receive your new WS12 in one box.
Box 1: WS12 Window Unit + Accessories
Weight: around 75 lbs
How much does shipping cost?
Worldwide: Highly discounted shipping (your total will be displayed at checkout before you purchase).
Which package provider will ship my unit?
We mostly contract with UPS for USA shipments. For international shipments, DHL, FedEx, UPS, or other carriers may handle the shipment.
What if my package gets damaged?
That's not your problem. Remember you have a 365-day Buy and Try Guarantee so you can return your unit for any reason or no reason. We'll even cover the shipping costs back to us.
Frequently Asked Questions about WS12
Is the WS12 as quiet as a mini-split?
Honestly, no. The WS12 runs at about 55 dB indoors near the unit (vs. 42.5 dB for the MS12/HS12 in turbo mode). Window units are inherently louder because the compressor is in the room. That said, the WS12's inverter compressor is significantly quieter than a standard window unit — no jarring on/off cycling. At 25% speed, it's very manageable. If whisper-quiet is your top priority, consider the MS12 mini-split.
Can the WS12 heat as well as cool?
No — the WS12 is cooling only. If you need heating, look at our mini-split lineup: the MS12 or MS24 for moderate climates, or the HS12 or HS24 for extreme cold.
Does the WS12 use the Quick ’n’ EasyTM connection system?
No — the WS12 doesn't need it. Quick ’n’ EasyTM is for connecting indoor and outdoor units via a refrigerant line set. Since the WS12 is a single self-contained window unit, there's nothing to connect. Just place it in your window and plug it in.
Do I need solar panels right now or can I get them later?
Nope. The WS12 works perfectly on standard 120V grid power alone — and it's still twice as efficient as a typical window unit. Add solar whenever you're ready.
How much solar wattage do I need?
We recommend around 1,800 watts of solar panels (80-380V input range). Budget around $600 for panels plus mounting.
Will it fit my window?
The WS12 requires a minimum window size of 24" wide × 36" high (which gives you a 23.5" wide × 16" high opening). It works with standard single-hung and double-hung windows. Sliding windows or casement windows are not compatible without modification.
Can I use it without a window (through-the-wall)?
We recommend window installation for the WS12. Through-the-wall installation may be possible but would require custom framing and is not officially supported. If you want a through-the-wall solution, consider the MS12 mini-split — it's designed for exactly that.
How does it compare to a regular window AC?
The WS12 is roughly twice as efficient as a standard window unit (15 CEER vs. 7-8 CEER typical). It has an inverter compressor with variable speed control (25/50/75/100%), so it uses less energy at lower settings. The inverter also eliminates the on/off cycling of traditional window units — no inrush current surges, which saves money and reduces noise. It runs at about 55 dB, which is louder than a mini-split but comparable to a quality window unit. And of course, it can run on solar — which no other window unit can do.
Should I get the WS12 or the MS12 mini-split?
The WS12 is best if: you're renting, you can't drill holes, you only need cooling, you want the lowest upfront cost, or you want a portable unit you can take when you move.
The MS12 is best if: you want heating and cooling, you want whisper-quiet operation, you want higher efficiency, you want a permanent built-in solution, or you don't want to sacrifice window space.
Both are solar/hybrid, both are backed by the same 5-year guarantee, and both cool around 500 sq ft with 12,000 BTU.
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