01
Grid only Works on day one
Connect to a 220/240V outlet and enjoy high-efficiency heating and cooling across your connected zones. No solar required — ever, if you choose.
Airspool MU24 Multi-Head Quick ’n’ EasyTM Multi-Head Solar/Hybrid Air Conditioner & Heater (24,000 BTU · 2 zones + optional 3rd)
Two rooms, one outdoor unit — solar first. Twist-connect each zone in about 5 minutes. Add a third zone if you want it.
$4,445
From $402/mo
with
or
12 monthly payments at 15% APR with Affirm or Shop Pay. Subject to eligibility — see options at checkout.
Next step: pick the line-set length for each zone — and add an optional third zone if you want one.
- 365-Day Buy & Try
- 5-Year Parts & Labor
- Ships from our US HQ
- True DIY install — no HVAC tech, no vacuum pump, no gauges. Just a drill.
- Two independent climate zones included, with an optional third.
- About 5 minutes per zone to twist-connect.
- Runs on solar, grid, either or both — solar always prioritized, automatically.
- Each zone sets its own temperature, from its own remote or the app.
5.0★
from 2 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 MU24 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.
2 zones
included · optional 3rd
24,000 BTU
heating & cooling, one outdoor unit
1,000 sq ft
combined coverage
22 SEER2
cooling efficiency
02How it works
Three ways to power it. Zero switches to flip.
02
Solar only Fully off-grid
Going off grid? We recommend around 3,000 watts of panels for year-round comfort across your connected zones.
03
Hybrid Sunshine first, automatically
The MU24 seamlessly blends grid and solar power so you never lose comfort in any connected zone. 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)
One drill. One afternoon. Six steps.
Most first-timers finish in 2–4 hours. The refrigerant connection itself takes about 5 minutes — by hand.
-
01
Place the outdoor unit
Set it on a stable surface with room for airflow, positioned to minimize line-set distances to your zones.
-
02
Drill the pass-throughs
One hole per zone with the included hole saw. Angle slightly downward for drainage.
-
03
Mount the indoor units
Secure each wall bracket, hang Zone 1 and Zone 2, check they are level.
-
04
Twist to connect each zone
Route the pre-charged lines from each indoor unit to the outdoor unit. About 5 minutes per zone — no vacuum pump, no gauges.
-
05
Plug in solar (optional)
Mount the isolator and click the solar connectors together — or skip this and run on grid.
-
06
Turn it on
Power up, set each zone's comfort mode. Independent temperatures, one system.
Can someone who has never touched HVAC connect a mini-split in under 5 minutes? Timed, on camera.
“So far i have installed both head units and the outside unit. My wife helped hang the inside units, had no problems. I did the rest by myself, still no problems.”
— Jon Keehmer, verified customer
“I have installed over a dozen Airspool units in the last 4 plus years. Zero call backs, zero issues, highly recommend.”
— Tyler Williams, 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
04The honest question
“Will the twist-connect actually seal?”
What goes wrong with normal DIY mini-splits
Refrigerant leaks from badly-made flare connections. Skipped vacuum steps. Moisture trapped in the lines. Installing a typical mini-split takes a vacuum pump, gauge set, specialized wrenches, adapters, wire cutters — plus the know-how, patience, and time to use them right. Get one step wrong and the system leaks.
Why the MU24 sidesteps all of it
We do that work at our US headquarters. The refrigerant lines arrive pre-charged and sealed with our patent-pending Quick ’n’ EasyTM self-sealing twist valves. No flaring, no vacuum, no moisture risk. You twist the connections by hand — the whole hook-up takes about 5 minutes. They even unscrew and reconnect later without losing refrigerant, if you ever move the unit.
Every single unit is tested on solar, grid, and hybrid power before it leaves our building. That's why we can back it for five years — DIY install included.
05Proof, 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.
06The full record
Airspool MU24 Reviews
5.00
out of 5
Showing 2 of 2 reviews
-
4 years, zero issues!
I have installed over a dozen Airspool units in the last 4 plus years. Zero call backs, zero issues, highly recommend. Seems possible to find cheaper units now, but I will not stray from these guys. Always someone knowledgeable to talk with when needed, always excellent customer service, worth every penny. The first two units I put on my home over 4 years ago have been running nonstop summer and winter here in Arizona, with no trouble. Just keep the filters and coils clean and enjoy !
Built to lastGreat supportWorth it
-
Jon's Review 11/62025
So far i have installed both head units and the outside unit. My wife helped hang the inside units, had no problems. I did the rest by myself, still no problems. Using it now with AC power, will work on the solar next.
Very happy with it so far.
Easy installTrue DIY
No reviews match that combination.
07The 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.
Some customers report running costs under $50 a year — yours depends on sun, climate, and electricity rates.
One outdoor unit, one solar connection, less wiring — a multi-head costs less than two separate systems covering the same rooms.
Run your own numbers: is solar air conditioning worth it?08Straight talk
Is the MU24 right for you?
We'd rather point you at the right unit than sell you the wrong one.
Right for you if…
- Two rooms that each need their own temperature — bedrooms, office, den (option to add a third)
- Rooms reasonably close to one shared outdoor unit
- 220/240V 20-amp power available — a plug can be added free of charge upon request
- Winters that rarely drop below 5°F
- You want solar now, later, or just the option
Not right for you if…
- You need three or four rooms covered → MU36 — three zones included, optional fourth
- You have one big open space, not separate rooms → MS24 — same 24k capacity, one zone, simpler install
- You need to heat one room while cooling another → Two separate mini-splits (all zones on a multi-head share one mode)
- Your winters regularly drop below 5°F → HS12 / HS24 SuperHeat — heat down to −22°F
09The numbers
MU24 specifications
- Capacity
- 24,000 BTU one outdoor unit · ideal for 1,000 sq ft combined
- Zones
- 2 included 12,000 BTU each · optional 3rd zone in the builder
- Efficiency
- 22 SEER2 10 HSPF2 heating
- Power
- 220/240V 20 amp · plug or bare wire
- Operating range
- 5°F – 125.6°F heats down to 5°F
- Modes
- Solar · Grid · Hybrid auto-switching, solar prioritized
- Recommended solar
- ~3,000 W budget ~$1,150 for panels plus mounting
- Line sets
- Zone 1: 16'5" · Zone 2: 10 ft pre-charged, twist-to-connect · Zone 2 extendable to 90 ft
| Specification | Unit | Value |
|---|---|---|
| Outdoor Unit | ||
| BTUs | 24K | |
| Power Supply AC | Volts/Phase/Hz | AC208-240/1/50-60 |
| Solar Input | ||
| PV Target Power Total | W | 3000.0 |
| PV Potential Range (Voc) | DC 150-410 | |
| String Input - Max PV (DC) Input Current | A | 14 |
| String Input - Max PV Isc | A | 22 |
| Number of Allowable Solar Strings | 1.0 | |
| Capacity | ||
| Cooling | Btu/h | 24,000 (7,800-27,000) |
| Heating | Btu/h | 24,000 (8,400-28,000) |
| Electric Data | ||
| Cooling Power Input | W | 1,901 (560-2,468) |
| Heating Power Input | W | 1,674 (560-2,216) |
| Rated Current (cooling) | A | 8.81 |
| Rated Current (heating) | A | 7.76 |
| Performance | ||
| SEER / SEER2 | 22.3 / 22 | |
| HSPF / HSPF2 | 11 / 10 | |
| EER / COP | BTU/W | 12.6 / 14.3 |
| Sound Pressure (outdoor) | dB(A) | 58.0 |
| Outdoor Unit Dimensions & Weight | ||
| Unit Dimension (L × W × H) | in | 34.96L × 12.5W × 27.55H |
| Packaging (L × W × H) | in | 39.6L × 16.45W × 29.72H |
| Net/Gross Weight | lbs | 118/126.75 |
| Piping | ||
| Design Pressure | PSIG | <651 |
| Refrigerant (R32) | oz | 57.85 |
| Refrigerant Precharge | ft | 16.4 |
| Additional Charge Per Ft | oz | 0.19 |
| Max Length, All Rooms | ft | 196.85 |
| Max Length, One Indoor Unit | ft | 98.43 |
| Max Height Difference, Indoor/Outdoor | ft | 49.21 |
| Max Height Difference, Between Indoor Units | ft | 32 |
| Operating Temperature | ||
| Outdoor (cooling/heating) | F | 5~125.6 / 5~75.2 |
| Indoor (cooling/heating) | F | 61~90 / 32~90 |
| Indoor Heads (12K standard · 18K optional Zone 3) | ||
| Cooling | Btu/h | 12K: 12000 · 18K: 17100 |
| Heating | Btu/h | 12K: 12000 · 18K: 17500 |
| Power Supply | V | DC 290-380 (both) |
| Power Input | W | 12K: 20 · 18K: 50 |
| Moisture Removal | pt/hr | 12K: 2.45 · 18K: 3.5 |
| Air Flow Volume | CFM | 12K: 365 · 18K: 559 |
| Sound Pressure | dB(A) | 12K: 42.5 · 18K: 46.0 |
| Unit Dimension (L × W × H) | in | 12K: 33.07L × 8.07W × 11.61H · 18K: 37.48L × 9.09W × 12.20H |
| Net Weight | lbs | 12K: 20.9 · 18K: 26.4 |
| Liquid / Gas Side | in | 1/4 / 1/2 (both) |
10In the box
Everything but the drill.
Open the boxes and the whole install is in front of you — down to the gloves.
- Outdoor unit (24,000 BTU compressor)
- Two indoor units — Zone 1 and Zone 2 (12,000 BTU each)
- Pre-charged twist-to-connect line set for Zone 1 (16' 5")
- Pre-charged twist-to-connect line set for Zone 2 (10 ft — extendable to 90 ft)
- 220/240V 20-amp power cord (12 AWG) with plug or bare wire, your choice
- 13 ft (4-meter) 4-lead communication control wire
- Two wall brackets, putty, and mounting hardware
- Two remote controls (with batteries)
- 10 ft condensate hose + 50 ft wrap tape + valve dust caps
- MC4 disconnect tools & extra connectors
- Clear English installation manual with tons of pictures
Included free Free Quick ’n’ EasyTM Bonus Kit
Solar whips, DC isolator box, 10 m solar wire, gloves, zip ties, tape, hole saw & bits, screwdriver bit, and level.
Adding the optional third zone in the builder? The extra indoor unit and matching hardware ship with your order.
11The risk is ours
Dave's Double Guarantee
365-Day “Buy & Try”
Take a full year — run it through summer and winter. 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.
12Pick 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 this page | $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 | $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 MU24 | Typical DIY / regular mini-split | |
|---|---|---|
| Refrigerant connection | Pre-charged, twist-to-connect by hand — about 5 minutes | Wrench-tightened valve connections (EG4 uses Mr. Cool-style valves: two wrenches across eight connection points) |
| Tools you buy | Just a drill — hole saw, bits, level, gloves all included | Typical installs need a vacuum pump, gauge set, and specialized wrenches |
| Solar input | Panels plug straight in — no inverter, no batteries | A regular mini-split has no solar input at all |
| Solar accessories | Solar whips, DC isolator, and solar wire included free | Not typically included (EG4 does not include them) |
| Wiring prep | Power cord pre-installed, comm wire pre-wired at our US HQ | EG4 does not pre-wire the comm wires or include the power cord |
| Testing before shipping | Every unit tested on solar, grid, and hybrid power | — |
| Guarantee | 365-day Buy & Try + 5-year parts & labor | Standard limited warranties; DIY install often voids them |
Optional add-on
Add solar to your MU24
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
13Logistics
One pallet shows up. Here it is.
- How does it arrive?
- Your MU24 ships palletized via a freight carrier. It arrives on a truck with a lift gate to your residence or business.
- How much does shipping cost?
- Highly discounted worldwide — your exact shipping total is displayed at checkout before you purchase.
- What if it 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
14Everything else
Questions, answered straight.
How loud is the MU24?
The indoor units operate at a whisper-quiet level — comparable to a library. The outdoor unit is similar to a normal conversation. You’ll barely notice any of them running.
Can I set different temperatures in each zone?
Yes! Each indoor unit has its own remote and can be controlled independently through the Airspool app. Set Zone 1 to 72°F and Zone 2 to 68°F — the system handles it.
Can I heat one zone and cool the other at the same time?
No — this is one of the tradeoffs of a multi-split system. Both zones must be in the same mode (both cooling or both heating). If you need the ability to heat one room while cooling another, consider two separate mini-splits instead.
If I add a third unit, how does the math work? (12K + 12K + 12K = 36K, but the outdoor unit is 24K?)
Great question. With a third indoor unit, the indoor heads total 36,000 BTU (12K + 12K + 12K), but the outdoor compressor is rated at 24,000 BTU. This is normal for multi-splits.
All zones rarely demand maximum power simultaneously. When one room is near its setpoint, it draws less power — leaving more for the other zones. If all the zones are working hard (like initial cool-down on a hot day), the system intelligently distributes capacity. All rooms will still reach their targets.
What's the difference between Zone 1, Zone 2, and an optional Zone 3?
Both included zones use 12,000 BTU indoor heads. Zone 1 includes a 16 ft line set. Zone 2 includes a 10-ft line set, extendable up to 90 ft. If you add the optional third zone, you can choose the head size and line set that fit that room in the builder.
What kind of electrical outlet does the MU24 need?
220/240V, 20-amp — same type used for clothes dryers. Most homes already have this available. A plug can be added free of charge upon request.
Do I need solar panels?
No — the MU24 works perfectly on grid power alone. Add solar whenever you’re ready. We recommend about 3,000 watts (~$1,150 for panels plus mounting) when you do.
How long does the MU24 take to install?
Plan on 3-5 hours. About 2-3 hours for the first zone (mounting, drilling, routing), then another 1-2 hours for the second zone. The twist-to-connect connections are about 5 minutes per zone.
What tools do I need?
Just a drill — and ideally an extra set of hands for hanging the indoor units. We include the hole saw, drill bits, screwdriver bit, level, and all hardware for both zones.
Can I add a 3rd zone later?
The MU24 supports two zones. If you need three zones, check out the MU36 (36,000 BTU, 3 zones). Or combine an MU24 with a separate mini-split for maximum flexibility.
Should I get the MU24 or two separate mini-splits?
Multi-split (MU24) advantages: lower cost, one outdoor unit, less wiring, one solar connection, smaller outdoor footprint.
Separate mini-split advantages: full redundancy, shorter line sets, ability to heat one room while cooling another simultaneously, 120V option for 12K units.
If your zones are close together and don’t need simultaneous heat/cool — go MU24.
Can I move the MU24 after installation?
Yes. All twist-to-connect valves unscrew and reconnect without losing refrigerant. The entire system is portable — disconnect in about 5 minutes per zone.
What happens if I have too much or too little solar power?
Same as all Airspool units. Too little? Grid fills in automatically. Too much? Excess goes unused harmlessly.
What maintenance does the MU24 need?
Clean each indoor unit’s air filter quarterly. Vacuum the indoor coils and spray down the outdoor coil annually. Simple and quick for all zones.
What's included with my MU24?
The standard MU24 package includes 1 outdoor unit (24K BTU), 2 indoor units, pre-charged twist-to-connect line sets for both included zones, 220/240V power cord, communication wire, 2 wall brackets, 2 remote controls, condensate hose, and the free Quick ’n’ EasyTM Bonus Kit. If you add the optional third zone in the builder, that extra indoor unit and its matching hardware are included with that configuration.
How much does shipping cost for the MU24?
Shipping is highly discounted worldwide and shown at checkout before you purchase. The MU24 ships palletized and arrives on a truck with a lift gate to your residence or business.
