★★★★★
“Two 12000 Solar Mini Split installs
Dave and Todd are very professional in the knowledge and ales of the Airspool Solar Mini Splits!! They were able to answer all my questions and offer suggestions on the DIY install!!!”
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Airspool MU36 Multi-Head Solar/Hybrid Air Conditioner and Heater (36,000 BTU)
Quick ’n’ EasyTM model
Designed for straightforward DIY installation with Airspool's Quick ’n’ EasyTM connection system.
Flexible zone count
The MU36 comes standard with three indoor heads on one 36,000 BTU outdoor unit, and you can optionally add a fourth 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 three included indoor heads, with an optional fourth head available if you want another comfort zone from the same solar/grid hybrid system.
Three rooms standard. Optional fourth room if you want it. One outdoor unit. Zero HVAC technicians. The Airspool MU36 is the biggest Quick ’n’ EasyTM system yet — a 36,000 BTU multi-split that gives you independent climate control across three zones out of the box, with the option to add a fourth zone. Same solar-first hybrid power, same 5-minute-per-zone twist connections, same bulletproof 5-year guarantee. Just more comfort, more coverage, and more savings.
- True DIY install — no HVAC tech needed
- 3 independent climate zones included, with optional 4th zone
- 5 minutes per zone to connect (twist-to-connect)
- Runs on solar, grid, or both (solar always prioritized)
- 365 Day "Buy and Try" Guarantee + 5-Year Full Guarantee
- Portable — relocate to another room or another home
★★★★★
“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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Meet the Airspool MU36
The MU36 is Airspool's whole-home solution. One powerful outdoor unit powers three indoor zones out of the box, with the option to add a fourth indoor zone if you want it — all connected with the Quick ’n’ EasyTM system that takes about 5 minutes per zone.
Each indoor unit delivers 12,000 BTU of cooling and heating — enough for a bedroom, office, or living area up to ~500 sq ft. Combined, you're looking at 36,000 BTU of total climate control across your home, guest house, or property, with the flexibility to expand to one more room from the same outdoor unit.
And like every Airspool, it's a true hybrid. Solar when the sun's up, grid when it's not. No batteries, no inverters, no headaches.
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 4,500 watts of solar panels to enjoy year-round comfort across your connected zones.
Hybrid Grid/Solar
Your MU36 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 MU36 Layout
Zone 1 includes a 25 ft line set.
Zone 2 includes a 16 ft line set, and Zone 3 includes a 10 ft line set. If you want a fourth zone, you can add it in the MU36 builder, and that optional Zone 4 includes a 10 ft line set. Extended line sets can be ordered for any room that is farther away.
That makes the MU36 ideal for three nearby rooms, or for a layout that starts with three rooms and expands to a fourth. 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 fourth 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. One remote per indoor unit, total control.
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 MU36?
Plan on 4-6 hours for the standard three-zone install — you're essentially repeating the same process three times. The twist-to-connect work is about 5 minutes per zone (15 minutes total). If you add the optional fourth zone, allow a bit more time for that room. Having a helper to hold indoor units while you tighten brackets will speed things up.
What tools do I need at home to install an MU36?
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 the hardware for each zone you order.
Colorado customers completing an install
Airspool MU36 Multi-Head Specs at a Glance
| Feature | Details |
|---|---|
| Total Capacity | 36,000 BTU outdoor unit |
| Zone 1 | 12,000 BTU indoor unit (~500 sq ft) |
| Zone 2 | 12,000 BTU indoor unit (~500 sq ft) |
| Zone 3 | 12,000 BTU indoor unit (~500 sq ft) |
| Zone 4 (Optional Add-On) | Choose the head size that fits that room in the MU36 builder |
| 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 | ~4,500 watts |
| Line Set — Zone 1 | Copper, 25 ft, pre-charged, twist-to-connect |
| Line Set — Zone 2 | Copper, 16 ft, pre-charged, twist-to-connect. Extendable as needed. |
| Line Set — Zone 3 | Copper, 10 ft, pre-charged, twist-to-connect. Extendable as needed. |
| Line Set — Zone 4 (Optional) | Copper, 10 ft, pre-charged, twist-to-connect. Extendable as needed. |
| Communication Wire | 4 meters (13 ft), 4-lead per zone |
| Certifications | ENERGY STAR Most Efficient 2026, ETL, AHRI, UL |
| Portability | Fully portable — twist-disconnect, move, twist-reconnect |
| Specification | Unit | Value |
|---|---|---|
| Outdoor Unit | ||
| BTUs | 36K | |
| Power Supply AC | (Volts/Phase/Hz) | AC208-240/1/50-60 |
| Solar Input | ||
| PV (Photovoltaic) Target Power Total | Watts | 4500.0 |
| PV (Photovoltaic) Potential Range | Voc (open-circuit voltage from the back of the panels) | DC 100-410V (note: this unit has 2 ports to allow 2 strings of solar panels in series) |
| String Input - Max PV (DC) Input Current | 13 + 13 | |
| String Input - Max PVISC | 22 + 22 | |
| Number of Allowable Solar Strings | 2.0 | |
| Capacity | ||
| Cooling | Btu/h | 36,000 (8,500 - 41,300) |
| 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 | 12.52 |
| Rated Current (heating) | Amps | 11.59 |
| Performance | ||
| SEER / SEER2 | 22.45 / 22.5 | |
| HSPF / HSPF2 | 11.4 / 10 | |
| EER / COP | BTU/W | 12.6 / 13.6 |
| Sound Pressure Noise Level | dB(A) | 60.0 |
| Dimensions | ||
| Net (W x D x H) | mm / inches | 942x375x844 / 37.09x14.8x33.2 |
| Packaging (W x D x H) | mm / inches | 1085x430x1035 / 42.7x18.7x39.8 |
| Weight | ||
| Net/Gross | kg / lbs | 78.18/90.18 / 172/198.4 |
| Piping | ||
| Design Pressure | PSIG Kg/cm2 | <652 <45.84 |
| Refrigerant (R32) | kg / ounces | 2.24 / 86.42 |
| Refrigerant Precharge | m / ft | 5 / 16.4 |
| Additional Charge Per | kg / oz | 0.006 / 0.21 |
| Max. Length for All Rooms | m / ft | 80 / 262.47 |
| Max. Length for One Indoor Unit | m / ft | 35 / 114.83 |
| 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 | ||
| Ambient 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 | 24K Head |
|---|---|---|---|---|
| Capacity | ||||
| Cooling | BTUs/hr | 12000.0 | 17100.0 | 24000.0 |
| Heating | BTUs/hr | 12000.0 | 17500.0 | 24000.0 |
| Electric Data | ||||
| Power Supply | V | DC 290 - 380 | DC 290 - 380 | DC 290 - 380 |
| Power Input | W | 20.0 | 50.0 | 50.0 |
| Fan Speed | ||||
| Turbo/5/4/3/2/1 | r/min | 1250/1200/1100/1000/900/850 | 1250/1200/1100/1000/900/850 | 1250/1200/1100/1000/900/850 |
| Performance | ||||
| Air Flow Volume | CFM / m3/hr | 365 / 620 | 559 / 950 | 765 / 1,300 |
| Sound Pressure Noise Level | dB(A) | 42.5 | 46.0 | 50.0 |
| Dimensions | ||||
| Net (W x H x D) | mm / inches | 840x205x295 / 33.07x8.07x11.61 | 952x310x231 / 37.48x12.20x9.09 | 1,080x330x237 / 42.5x13x9.3 |
| Package (W x H x D) | mm / inches | 920x290x360 / 36.22x11.42x14.17 | 1045x376x326 / 41.14x14.80x12.83 | 1,140x382x300 / 44.9x15x11.8 |
| Weight | ||||
| Net | kg / lbs | 9.5 / 20.94 | 12 / 26.4 | 15 / 33.07 |
| Gross | kg / lbs | 11.8 / 26.96 | 15 / 33 | 17.5 / 38.58 |
| Pipe Diameter | ||||
| Liquid Side | mm (inch) | 6.35 (1/4) | 6.35 (1/4) | 6.35 (1/4) |
| Gas Side | mm(inch) | 9.52 (1/2) | 12.7 (1/2) | 12.7 (1/2) |
| Drainage | mm / inches | 16.9 / .66 | 16.9 / .66 | 16.9 / .66 |
What’s Included with Your MU36
Everything you need (except a drill and solar panels):
- 1× Outdoor unit (36,000 BTU compressor)
- 3× Indoor units — 12,000 BTU each
- Pre-charged twist-to-connect refrigerant line set — Zone 1 (25 ft)
- Pre-charged twist-to-connect refrigerant line set — Zone 2 (16 ft)
- Pre-charged twist-to-connect refrigerant line set — Zone 3 (10 ft)
- 220/240V 20-amp power cord (12 AWG) with plug
- 4-meter 4-lead communication control wire per zone
- 3× Wall brackets, putty, and mounting hardware
- 3× 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
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.
If you add the optional fourth zone in the builder, that extra indoor unit, its matching hardware, and its 10 ft line set are included with that configuration.
Need longer line sets for Zones 2, 3, or an optional Zone 4? Order extended line sets separately — see the “Planning Your MU36 Layout” section above.
Solar panels and mounting hardware are not included. You'll need around 4,500 watts of solar. Budget around $1,650 for panels plus mounting.
Indoor Unit (x3)
Backed by Dave’s Double Guarantee
Like every purchase you make with Airspool, your MU36 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 MU36 Shipped
Here's what to expect when we ship your MU36.
The packages you'll receive
Your new MU36 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 MU36
Click a question to expand
How loud is the MU36?
The indoor units operate at whisper-quiet, library-like levels. Even with three zones running, the outdoor unit is comparable to a normal conversation. You’ll barely notice the system.
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, Zone 2 to 68°F, and Zone 3 to 74°F — the system handles it.
Can I heat one zone and cool another at the same time?
No — all zones must be in the same mode (all cooling or all heating). If you need simultaneous heating and cooling in different rooms, consider separate mini-splits instead.
Can I run only one or two zones and leave the others off?
Absolutely. Turn off individual zones as needed — the system only uses the power required for the active zone(s). Great for saving energy when not all rooms are occupied.
Are all three indoor units the same size?
Yes — all three are 12,000 BTU each. Like the updated MU24 base configuration, the MU36 uses equal-sized indoor heads for balanced performance across all zones, but the MU36 adds a third zone and more total capacity.
What's the difference between the MU24 and the MU36?
The MU24 has 2 zones (12K + 12K BTU) from a 24K outdoor unit. The MU36 has 3 zones (12K + 12K + 12K) from a 36K outdoor unit. The MU36 adds an extra zone and more total capacity while keeping the same equal-sized indoor head approach. Both use the same Quick ’n’ EasyTM connection, 220/240V power, and 5-year guarantee.
What kind of electrical outlet does the MU36 need?
220/240V, 20-amp — same type used for clothes dryers and ovens. Most homes already have this available. A plug can be added free of charge upon request.
Do I need solar panels?
No — the MU36 works perfectly on grid power alone. Add solar whenever you’re ready. We recommend about 4,500 watts (~$1,650 for panels plus mounting) when you do.
How long does the MU36 take to install?
Plan on 4-6 hours. You’re repeating the same process three times: mount, drill, route. The twist-to-connect connections are about 5 minutes per zone (15 minutes total for all three). Having a helper to hold indoor units speeds things up.
What tools do I need?
Just a drill — and ideally an extra set of hands. We include the hole saw, drill bits, screwdriver bit, level, and all hardware for all three zones.
Should I get the MU36 or three separate mini-splits?
Multi-split (MU36) advantages: much lower cost than three separate systems, one outdoor unit, one solar connection, less wiring, smallest outdoor footprint.
Separate mini-split advantages: full redundancy, shorter line sets, ability to heat one room while cooling another, 120V option for 12K units.
If you need three zones and want to save money and outdoor space — the MU36 is hard to beat.
Can I move the MU36 after installation?
Yes. All twist-to-connect valves unscrew and reconnect without losing refrigerant. The entire three-zone system is fully portable.
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 MU36 need?
Clean each indoor unit’s air filter quarterly — that’s three filters, each taking about 2 minutes. Vacuum all three indoor coils and spray down the outdoor coil annually.
What's included with my MU36?
1 outdoor unit (36K BTU), 3 identical indoor units (12K BTU each), pre-charged twist-to-connect line sets for all three zones, 220/240V power cord, communication wire for each zone, 3 wall brackets, 3 remote controls, condensate hose, and the free Quick ’n’ EasyTM Bonus Kit. Everything except a drill, solar panels, and any extended line sets you may need.
How much does shipping cost for the MU36?
Shipping is highly discounted worldwide and shown at checkout before you purchase. The MU36 ships palletized and arrives on a truck with a lift gate to your residence or business.
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