01
Grid only Works on day one
Plug your WS12 into any standard 120V outlet and enjoy high-efficiency cooling. No solar required — and at 15 CEER it is still about twice as efficient as a typical window unit.
Airspool WS12 Solar/Hybrid Window Air Conditioner (12,000 BTU · cooling only)
Solar air conditioning that installs in about 10 minutes. Set it in the window, plug it in — panels optional. No holes, no line sets, no outdoor unit.
$1,195On Sale$995
4 interest-free payments of $248.75
with
or
0% APR with Affirm or Shop Pay. Subject to eligibility — see options at checkout.
Ships in 2 boxes with the solar bonus kit included. You supply the panels if you want solar.
- 365-Day Buy & Try
- 5-Year Parts & Labor
- Ships from our US HQ
- No installation — set it in your window, apply the gasket, plug it in.
- Runs on solar, grid, either or both — solar always prioritized, automatically.
- Inverter compressor — about twice as efficient as a standard window unit.
- Variable speed: 25%, 50%, 75%, or 100% power.
- Plugs into any standard 110/115/120V outlet (15-amp).
- Touch controls + remote + Airspool app.
5.0★
from 4 customer reviews
365 days
Buy & Try — full refund, we pay return shipping
5 years
parts & labor guarantee
US HQ
every unit is assembled, upgraded, customized, and tested before it ships to you
01The big idea
Solar air conditioning, without the science project.
Most “solar AC” setups need batteries, an inverter, and net metering — you end up spending as much on the system around the air conditioner as on the air conditioner itself.
The WS12 skips all of it. Its DC motors run on the same power solar panels make, so panels plug straight into the unit. Sun out? It runs on solar first. Sun fades? Grid power fills in automatically. You switch nothing, manage nothing — and it works on day one with zero panels.
What you don't need
Batteries
Inverter
Net metering
Vacuum pump & gauges
Panels plug straight in. That's the whole system.
10 min
to install — no tools
12,000 BTU
cooling only
500 sq ft
coverage
15 CEER
~2× a standard window unit
02How it works
Three ways to power it. Zero switches to flip.
02
Solar only Free cooling in the sun
Connect approximately 1,800 watts of solar panels and cool your space for free during sunny hours.
03
Hybrid Sunshine first, automatically
The WS12 seamlessly blends solar and grid power so you never lose comfort. Solar is prioritized; grid fills in as needed.
Too little solar? Grid fills in automatically. Too much? No harm done. You never touch a switch.
03Do it yourself (really)
No drill. No line set. About 10 minutes.
Three steps: open the window, set the unit, plug it in. There's no refrigerant connection to make — the WS12 is one sealed unit.
-
01
Open your window
Works with standard single-hung and double-hung windows. Minimum window size: 24" wide × 36" high (23.5" × 16" opening).
-
02
Place the unit and secure
Set the WS12 in the opening, apply the self-adhesive foam gasket, and lower the sash onto the unit. For added security, screw it into the window frame.
-
03
Plug in and cool down
Plug into any standard 110/115/120V outlet (15-amp). Want solar? Click your panels into the solar input. That's it.
“came two days later in perfect condition with everything I needed to get started to plug into solar panels works perfect”
— Mark Mc Reynolds, verified customer
You won't be left alone with a manual. Although it is an industry-best manual — full-color photos, written in plain English — you also get dozens of install videos and unlimited phone support if you get stuck.
Read the full installation manual Watch the step-by-step install videos
04Proof, not promises
Field-tested where it hurts.
Phoenix garages, Vegas summers, off-grid desert homesteads, a cabin in Quebec. Every word below is from a real customer — as written.
2 daysfrom order to cooling in SoCal
“I called Dave told me what I needed paid online for the unit came two days later in perfect condition with everything I needed to get started to plug into solar panels works perfect keeps our living room dining room kitchen area at 68°”
0 Wfrom the grid — he forgot to plug it in
“Sometimes in life we forget things. Like hooking up a solar air conditioner and playing around with your phone on the controls and how cold it was putting out l, only to look down and realize that it wasnt plugged in at all. Impressive!!!!”
100%solar, even under light clouds
“The ac is easy to use and with 4 45 watt panels it runs at 100% solar even when light clouds cover sun”
05The full record
Airspool WS12 Reviews
5.00
out of 5
Showing 5 of 5 reviews
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Ws12
Delivery was fast. I live on the Texas coastline hot and humid. The unit runs at 50% and very comfortable at night it runs at 25% and still comfortable by morning. Very happy with it. I plan on getting a split unit next, and then another window unit. Keep my house cool without a high electric bill.
Extreme heatLower billsFast shippingWorth it
-
Great product and Customer Service A+
Wanted to save a little money on air-conditioning here in Southern California I called Dave told me what I needed paid online for the unit came two days later in perfect condition with everything I needed to get started to plug into solar panels works perfect keeps our living room dining room kitchen area at 68°
Great supportFast shippingRuns on solar
-
A+
Sometimes in life we forget things. Like hooking up a solar air conditioner and playing around with your phone on the controls and how cold it was putting out l, only to look down and realize that it wasnt plugged in at all. Impressive!!!!
Runs on solarApp control
-
Runs with my array even when clouds cover sun.
The ac is easy to use and with 4 45 watt panels it runs at 100% solar even when light clouds cover sun
Runs on solar
-
So far, so good!
All I have had time for was to take it out of the box and that was excellent.
No reviews match that combination.
06The running cost
What it costs to run. Honestly.
50–80%
lower cooling-related electricity costs during sunny months — what Airspool customers typically report
Air conditioning is 50–70% of most summer electricity bills. Solar targets that biggest expense directly.
On grid alone the WS12 runs 15 CEER — about twice the efficiency of a typical window unit (7–8 CEER).
No inverter, batteries, or net-metering paperwork — panels plug straight into the unit, so the system around the AC costs nothing.
Run your own numbers: is solar air conditioning worth it?07Straight talk
Is the WS12 right for you?
We'd rather point you at the right unit than sell you the wrong one.
Right for you if…
- You're renting, or can't drill holes — the WS12 is completely reversible and moves with you
- You want cooling only (no heating needed), for a room up to about 500 sq ft
- A standard single-hung or double-hung window at least 24" wide × 36" high
- Any standard 110/115/120V outlet (15-amp)
- You want to try solar AC at the lowest upfront cost
Not right for you if…
- You need heating too → MS12 mini-split — heating and cooling from the same 12k unit
- Whisper-quiet is your top priority → MS12 — the compressor lives outside (42.5 dB indoors vs ~55 dB)
- You have sliding or casement windows → MS12 — designed for through-the-wall installs
- You live somewhere with serious winters → HS12 SuperHeat — heats down to −22°F
08The numbers
WS12 specifications
- Capacity
- 12,000 BTU cooling only · ideal for around 500 sq ft
- Efficiency
- 15 CEER ~17 SEER2 equivalent on grid · about 2× a standard window unit
- Power
- 110/115/120V 15 amp — any standard household outlet
- Compressor
- Inverter variable speed: 25% / 50% / 75% / 100%
- Recommended solar
- ~1,800 W 75–380V input · no batteries or inverters needed
- Minimum window
- 24" × 36" single-hung or double-hung · 23.5" × 16" opening
- Condensate
- Slinger ring evaporates on the outdoor coil — no hose needed
- Noise
- ~55 dB indoors inverter compressor — no jarring on/off cycling
| Specification | Unit | Value |
|---|---|---|
| General | ||
| BTUs | 12K | |
| Normal Coverage Area | sq ft | 500 |
| Power Supply AC | Volts/Phase/Hz | AC110-120/1/60 |
| Solar Input | ||
| PV Target Power Total | W | +/- 1,800 |
| PV Potential Range (Voc) | DC 75 - 380 | |
| String Input - Max PV (DC) Input Current | A | 15.0 |
| String Input - Max PV Isc | A | 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) |
| Electric Data | ||
| Cooling Power Input | W | 1150.0 |
| Rated Current (cooling) | A | 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 | 294/265/235 |
| Sound Pressure Noise Level | dB(A) | 56.0 |
| Moisture Removal | pt/hr | 2.65 |
| Dimensions & Weight | ||
| Net (L × W × H) | in | 24.8L × 18.98W × 14.96H |
| Packaging (L × W × H) | in | 27.71L × 22.09W × 16.93H |
| Net/Gross Weight | lbs | 66.14/77.16 |
| Refrigerant | ||
| Design Pressure | PSIG | <610 |
| Refrigerant (R32) | oz | 57.85 |
| Refrigerant Precharge | oz | 16.93 |
| Operating Temperature | ||
| Outdoor Temp | F | 50 - 131 |
| Indoor Temp | F | 61 - 90 |
09In the box
Everything but the drill.
Open the boxes and the whole install is in front of you — down to the gloves.
- WS12 window unit (12,000 BTU) with 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
Included free Solar Bonus Kit — included
Solar whips prewired to your unit (4 ft), DC isolator box, and 10 m of solar wire correctly sized for your unit.
No condensate hose needed — the slinger ring evaporates condensate on the outdoor coil, which also boosts efficiency.
10The risk is ours
Dave's Double Guarantee
365-Day “Buy & Try”
Take a full year. Not right for you, for any reason or no reason? Return it for a full refund, and we cover the shipping back to us.
5-Year Guarantee
For five full years we make sure your unit keeps running like new — all parts and labor covered. We can back it this far because every unit is tested on solar, grid, and hybrid power before it ships.
11Pick your unit
Is this the right Airspool for you?
| Model | Price | BTU | Coverage | Heats to | Power | Best for |
|---|---|---|---|---|---|---|
| MS12 | $2,245$1,995 | 12k | 500 sq ft | 5°F | 120V standard plug | One room, mild winters, standard outlet |
| MS24 | $3,095 | 24k | 1,000 sq ft | 5°F | 220V (20 amp) | One big open space |
| HS12 | $2,330$2,155 | 12k | 500 sq ft | −22°F | 120V (20 amp, NEMA 5-20R) | One room, harsh winters |
| HS24 | $3,295$3,195 | 24k | 1,000 sq ft | −22°F | 220V (20 amp) | Big space, harsh winters |
| MU24 | $4,445 | 24k | 2–3 zones, 1,000 sq ft | 5°F | 220V (20 amp) | Two or three rooms, one outdoor unit |
| MU36 | $5,695 | 36k | 3–4 zones, 1,500 sq ft | 5°F | 220V (20 amp) | Three or four rooms, one outdoor unit |
| WS12 this page | $1,195$995 | 12k | 500 sq ft | Cooling only | 120V standard plug | Renters — no wall drilling |
And against everything that isn't an Airspool?
| Airspool WS12 | Typical DIY / regular mini-split | |
|---|---|---|
| Efficiency | 15 CEER (~17 SEER2 equivalent on grid) | A typical window unit runs 7–8 CEER |
| Compressor | Inverter, variable speed (25/50/75/100%) — no jarring on/off cycling or inrush surges | Fixed-speed compressor that cycles on and off |
| Solar input | Panels plug straight in — no batteries, no inverter | No other window unit can run on solar |
| Solar accessories | Prewired solar whips, DC isolator, and 10 m solar wire included | Not applicable |
| Guarantee | 365-day Buy & Try + 5-year parts & labor | Standard limited warranties |
Read the full Airspool WS12 vs. EG4 window unit comparison →
Optional add-on
Add solar to your WS12
It runs on grid power from day one — plug in FeatherVolt flexible solar panels whenever you’re ready and it runs on sunshine first. No batteries, no inverter.
Panels from $1,495
See the panels
12Logistics
Two boxes show up. Here they are.
- How much does shipping cost?
- Highly discounted worldwide — your exact shipping total is displayed at checkout before you purchase.
- Which carrier?
- Mostly UPS for US shipments. International orders may ship DHL, FedEx, UPS, or another carrier.
- What if a box arrives damaged?
- Not your problem — the 365-day Buy & Try covers it, and we pay the return shipping.
Airspool exists because we decided the hard part of a mini-split install — the refrigerant work — belonged in our shop, not on your wall. Every unit is customized and tested on solar, grid, and hybrid power at our US headquarters before it ships. If you have a question before or after you buy, call or text (725) 699-1200 — you'll get the same people who build and test these units, not a call center.
David VanZanten Founder and President of Airspool
13Everything else
Questions, answered straight.
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?
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 (75-380V 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 — something almost 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.
How much does shipping cost for the WS12?
Shipping is highly discounted worldwide and shown at checkout before you purchase. You will receive 2 boxes: the WS12 window unit with accessories (around 75 lbs) and the solar isolator (around 2 lbs).
