★★★★★
“Amazing Unit . Very easy to install
Amazing unit and it was super easy to install. Highly recommend this unit. Dave and his team are a class act and passionate about impacting the Solar Split AC Industry”
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Judge.me
Airspool MU24 Multi-Head Solar/Hybrid Air Conditioner and Heater (24,000 BTU)
Quick ’n’ EasyTM model
Designed for straightforward DIY installation with Airspool's Quick ’n’ EasyTM connection system.
Flexible zone count
The MU24 comes standard with two indoor heads on one 24,000 BTU outdoor unit, and you can optionally add a third indoor head for one more zone.
Power options
Runs on solar, grid, or hybrid mode, with solar power prioritized whenever it is available.
Multi-head layout
One outdoor unit powers the two included indoor heads, with an optional third head available if you want another comfort zone from the same solar/grid hybrid system.
Two rooms standard. Optional third room if you want it. One outdoor unit. Zero HVAC technicians. The Airspool MU24 is the world’s first solar/hybrid multi-split with Quick ’n’ EasyTM connections. That means you can install a true multi-zone HVAC system yourself, twist-connect each indoor unit to the outdoor unit in about 5 minutes per zone, and enjoy independent comfort in two separate spaces out of the box, with the option to add a third zone.
- True DIY install — no HVAC tech needed
- 2 independent climate zones included, with optional 3rd zone
- About 5 minutes per zone to connect
- Runs on solar, grid, or both (solar always prioritized)
- 365 Day "Buy and Try" Guarantee + 5-Year Full Guarantee
- Portable — unscrew, move, and reinstall later
★★★★★
“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!”
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Judge.me
Meet the Airspool MU24
The MU24 is the first multi-head / multi-split solar-hybrid system ever built for real DIY installation. One outdoor unit powers two indoor zones out of the box, with the option to add a third zone if you want it.
That means you can cool or heat two different spaces with one outdoor unit, one solar connection, and one clean install, with the flexibility to expand to a third room. Same hybrid behavior as the MS12 and MS24. Same Quick ’n’ EasyTM connection system. Same Airspool guarantee. Just with multiple indoor heads instead of one.
The MU24 is a true hybrid for "always on" comfort. It runs on solar when the sun's up and automatically uses grid power when it's dark or cloudy. No switches, no downtime, and no batteries required.
Operating Modes
Grid Power Only
Connect your unit to a 220/240V outlet and enjoy high-efficiency heating and cooling across your connected zones.
Solar Power Only
Going off grid? We recommend around 3,000 watts of solar panels to enjoy year-round comfort across your connected zones.
Hybrid Grid/Solar
Your MU24 seamlessly blends grid and solar power so you never lose comfort in any connected zone. Solar is prioritized, and grid power automatically fills in as needed.
Planning Your MU24 Layout
Zone 1 includes a 12,000 BTU indoor head and ships with a 16 ft line set.
Zone 2 includes a 12,000 BTU indoor head. It ships with a 10 ft line set, but this one can be extended all the way to 90 ft when needed.
If you want a third zone, you can add it in the MU24 builder and choose the head size and line set that fit that room.
That makes the MU24 ideal for two nearby rooms, or for a layout that starts with two rooms and expands to a third. Measure from the flare connection on each indoor head to the flare connection on the outdoor unit.
Need to customize your unit? Add longer line sets and even an entire third zone at checkout.
The Quick ’n’ EasyTM System
The Secret That Will Save You Hours and $$$
Installing a mini-split system typically requires a vacuum pump, gauge set, specialized wrenches, adapters, correct-sized screwdrivers, wire cutters/strippers, and potentially extra refrigerant. Plus, know-how, patience and time.
But not with Airspool.
We do all of that work and pre-install our patent-pending Quick ’n’ EasyTM valves at our US headquarters. So when your unit shows up at your doorstep, you just twist the connections!
We'll Customize Your Line Set Length!
With most mini-splits, you get what you get as far as line set length.
But not with Airspool.
Because we customize everything in-house, you have the option to customize the length of your lineset. All the way to 49 ft!
And, since we test all aspects (e.g. solar, grid, and a combination of both) before shipping, we know it's going to work for you. Because of this, you get an unprecedented 5-year functionality guarantee.
2 Ways to Control Your Airspool
Control each zone independently from your phone — set different temperatures for different rooms, schedule each zone's on/off times, and see your solar savings. The Apple/Android app gives you full control from anywhere in the world.
And each indoor unit comes with its own remote for quick, hands-on adjustments.
Download the Airspool App
How can we be so confident you can install this yourself, even with zero experience?
Because we give you:
- an industry-best installation manual full of full color photos and written in native English!
- dozens of installation videos which make it even easier
- and unlimited phone support if you get stuck!
Customers often ask...
How long will it take to install my MU24?
Plan on 3-5 hours for the standard two-zone install — about 2-3 hours for the first zone (mounting, drilling, routing), and another 1-2 hours for the second zone. If you add the optional third zone, allow a bit more time for that room. The twist-to-connect work itself is about 5 minutes per zone. If you've installed an Airspool before, you'll move faster the second time around.
What tools do I need at home to install an MU24?
Just a drill — and an extra set of hands for hanging the indoor units. We include the hole saw, drill bits, screwdriver bit, level, and the hardware for each zone you order. No vacuum pump, no gauges, no torque wrench.
Colorado customers completing an install
Airspool MU24 Multi-Head Specs at a Glance
| Feature | Details |
|---|---|
| Total Capacity | 24,000 BTU outdoor unit |
| Zone 1 (Primary) | 12,000 BTU indoor unit |
| Zone 2 (Secondary) | 12,000 BTU indoor unit |
| Zone 3 (Optional Add-On) | Optional third indoor unit available if you want one more zone on the same system |
| Efficiency | 23 SEER2 (cooling) · 10 HSPF2 (heating) |
| Power | 220/240V, 20-amp plug or bare wire |
| Frequency | 50 Hz or 60 Hz |
| Operating Range | Heats down to 5°F · Cools up to 131°F |
| Modes | Solar-only · Grid-only · Hybrid (auto-switch) |
| Recommended Solar Power | ~3,000 watts |
| Line Set — Zone 1 | Copper, 5 meters (16' 5"), pre-charged, twist-to-connect. |
| Line Set — Zone 2 | Copper, 3 meters (10 ft), pre-charged, twist-to-connect. Extendable up to 90 ft. |
| Line Set — Zone 3 (Optional) | Chosen in the builder to match the layout of your added third zone |
| Communication Wire | 4 meters (13 ft), 4-lead |
| Certifications | ENERGY STAR Most Efficient 2026, ETL, AHRI, UL |
| Specification | Unit | Value |
|---|---|---|
| Outdoor Unit | ||
| BTUs | 24K | |
| Power Supply AC | (Volts/Phase/Hz) | AC208-240/1/50-60 |
| Solar Input | ||
| PV (Photovoltaic) Target Power Total | Watts | 3000.0 |
| PV (Photovoltaic) Potential Range | Voc (open-circuit voltage from the back of the panels) | DC 150-410 |
| String Input - Max PV (DC) Input Current | 14A | |
| String Input - Max PVISC | 22A | |
| 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 | Watts | 1,901 (560-2,468) |
| Heating Power Input | Watts | 1,674 (560-2,216) |
| Rated Current (cooling) | Amps | 8.81 |
| Rated Current (heating) | Amps | 7.76 |
| Performance | ||
| SEER / SEER2 | 22.3 / 22 | |
| HSPF / HSPF2 | 11 / 10 | |
| EER / COP | BTU/W | 12.6 / 14.3 |
| Sound Pressure Noise Level | dB(A) | 58.0 |
| Dimensions | ||
| Net (W x D x H) | mm / inches | 888x318x700 / 34.96x12.5x27.55 |
| Packaging (W x D x H) | mm / inches | 1006x418x755 / 39.6x16.45x29.72 |
| Weight | ||
| Net/Gross | kg / lbs | 53.5/57.5 / 118/126.75 |
| Piping | ||
| Design Pressure | PSIG Kg/cm | <651 <45.77 |
| Refrigerant (R32) | kg / ounces | 1.64 / 57.85 |
| Refrigerant Precharge | m / ft | 5 / 16.4 |
| Additional Charge Per | kg / oz | 0.0054 / 0.19 |
| Max. Length for All Rooms | m / ft | 60 / 196.85 |
| Max. Length for One Indoor Unit | m / ft | 30 / 98.43 |
| Max. Height Difference Between Indoor and Outdoor Units | m / ft | 15 / 49.21 |
| Max. Height Difference Between Indoor Units | m / ft | 9.75 / 32 |
| Operating Temperature | ||
| Outdoor Temp (Cooling/Heating) | C / F | -15~52C / -15~24C / 5~125.6F / 5~75.2F |
| Indoor Temp (Cooling/Heating) | C / F | 16.1~32.2C / 0~32.2C / 61~90F / 32~90F |
| Indoor Unit Specification | Unit | 12K Head | 18K Head |
|---|---|---|---|
| Capacity | |||
| Cooling | BTUs/hr | 12000.0 | 17100.0 |
| Heating | BTUs/hr | 12000.0 | 17500.0 |
| Electric Data | |||
| Power Supply | V | DC 290 - 380 | DC 290 - 380 |
| Power Input | W | 20.0 | 50.0 |
| Moisture Removal | l/hr. / pints/hr. | 1.16 / 2.45 | 1.66 / 3.5 |
| Fan Speed | |||
| Turbo/5/4/3/2/1 | r/min | 1250/1200/1100/1000/900/850 | 1250/1200/1100/1000/900/850 |
| Performance | |||
| Air Flow Volume | CFM / m3/hr | 365 / 620 | 559 / 950 |
| Sound Pressure Noise Level | dB(A) | 42.5 | 46.0 |
| Dimensions | |||
| Net (W x H x D) | mm / inches | 840x205x295 / 33.07x8.07x11.61 | 952x310x231 / 37.48x12.20x9.09 |
| Package (W x H x D) | mm / inches | 920x290x360 / 36.22x11.42x14.17 | 1045x376x326 / 41.14x14.80x12.83 |
| Weight | |||
| Net | kg / lbs | 9.5 / 20.9 | 12 / 26.4 |
| Gross | kg / lbs | 11.8 / 26.96 | 15 / 33 |
| Pipe Diameter | |||
| Liquid Side | mm (inch) | 6.35 (1/4) | 6.35 (1/4) |
| Gas Side | mm(inch) | 12.7 (1/2) | 12.7 (1/2) |
| Drainage | mm / inches | 16.9 / .66 | 16.9 / .66 |
What’s Included with Your MU24
Everything you need for the standard two-zone setup (except a drill and solar panels):
- 1× Outdoor unit (24,000 BTU compressor)
- 1× Indoor unit — Zone 1 (12,000 BTU)
- 1× Indoor unit — Zone 2 (12,000 BTU)
- Pre-charged twist-to-connect refrigerant line set — Zone 1 (16' 5")
- Pre-charged twist-to-connect refrigerant line set — Zone 2 (10 ft — extendable)
- 220/240V 20-amp power cord (12 AWG) with plug or bare wire, your choice
- 13 ft (4-meter) 4-lead communication control wire
- 2× Wall brackets, putty, and mounting hardware
- 2× 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
If you want a third zone, add it in the builder and we’ll include the extra indoor unit and matching hardware with your order.
Free Quick ’n’ EasyTM Bonus Kit (included free)
Solar whips, DC isolator box, 10m solar wire, gloves, zip ties, tape, hole saw & bits, screwdriver bit, and level.
Indoor Unit (x2)
Backed by Dave’s Double Guarantee
Like every purchase you make with Airspool, your MU24 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 MU24 Shipped
Here's what to expect when we ship your MU24.
The packages you'll receive
Your new MU24 ships palletized via a freight carrier. It will arrive on a truck with a lift gate to your residence or business.
Pallet: Freight shipment
Delivered palletized via freight carrier with lift-gate service
How much does shipping cost?
Worldwide: Highly discounted shipping (when you enter your address at checkout, your shipping total will be displayed before you purchase).
Which package provider will ship my unit?
These larger systems ship via freight carrier on a pallet. Delivery arrives on a truck with a lift gate to your residence or business. For international shipments, DHL, FedEx, UPS, or other carriers may handle final delivery logistics.
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 MU24
Click a question to expand
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.
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.
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