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 MU36 Multi-Head Quick ’n’ EasyTM Multi-Head Solar/Hybrid Air Conditioner & Heater (36,000 BTU · 3 zones + optional 4th)
Three rooms, one outdoor unit — solar first. Independent comfort in every zone, and you install it yourself.
$5,695
From $515/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 fourth 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.
- Three independent climate zones included, with an optional fourth.
- 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.
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 MU36 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.
3 zones
included · optional 4th
36,000 BTU
cooling, one outdoor unit
1,500 sq ft
combined coverage
22.5 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 4,500 watts of panels for year-round comfort across your connected zones. The MU36 accepts two solar strings.
03
Hybrid Sunshine first, automatically
The MU36 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 centrally 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 Zones 1, 2, and 3, check each is 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, 15 minutes for all three.
-
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.
“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
“I've installed six Airspool units on a variety of projects over the last year, customers are happy which makes us happy. Very efficient units and so easy to install.”
— Mark Bohstedt, 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 MU36 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.
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 three separate systems covering the same rooms.
Run your own numbers: is solar air conditioning worth it?08Straight talk
Is the MU36 right for you?
We'd rather point you at the right unit than sell you the wrong one.
Right for you if…
- Three rooms that each need their own temperature (option to add a fourth)
- Rooms reasonably close to one shared outdoor unit — a home, guest house, or property up to ~1,500 sq ft combined
- 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 only need two rooms covered → MU24 — two zones included, optional third
- You have one big open space, not separate rooms → MS24 — 24k capacity, one zone, simpler install
- You need to heat one room while cooling another → 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
MU36 specifications
- Capacity
- 36,000 BTU one outdoor unit · ideal for 1,500 sq ft combined
- Zones
- 3 included 12,000 BTU each · optional 4th zone in the builder
- Efficiency
- 22.5 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
- ~4,500 W two solar strings supported · budget ~$1,650 for panels plus mounting
- Line sets
- 25 ft · 16 ft · 10 ft Zones 1–3, pre-charged, twist-to-connect · extendable as needed
| Specification | Unit | Value |
|---|---|---|
| Outdoor Unit | ||
| BTUs | 36K | |
| Power Supply AC | Volts/Phase/Hz | AC208-240/1/50-60 |
| Solar Input | ||
| PV Target Power Total | W | 4500.0 |
| PV Potential Range (Voc) | DC 100-410V (two ports allow 2 strings of panels in series) | |
| String Input - Max PV (DC) Input Current | A | 13 + 13 |
| String Input - Max PV Isc | A | 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 | W | 1,901 (560-2,468) |
| Heating Power Input | W | 1,674 (560-2,216) |
| Rated Current (cooling) | A | 12.52 |
| Rated Current (heating) | A | 11.59 |
| Performance | ||
| SEER / SEER2 | 22.45 / 22.5 | |
| HSPF / HSPF2 | 11.4 / 10 | |
| EER / COP | BTU/W | 12.6 / 13.6 |
| Sound Pressure (outdoor) | dB(A) | 60.0 |
| Outdoor Unit Dimensions & Weight | ||
| Unit Dimension (L × W × H) | in | 37.09L × 14.8W × 33.2H |
| Packaging (L × W × H) | in | 42.7L × 18.7W × 39.8H |
| Net/Gross Weight | lbs | 172/198.4 |
| Piping | ||
| Design Pressure | PSIG | <652 |
| Refrigerant (R32) | oz | 86.42 |
| Refrigerant Precharge | ft | 16.4 |
| Additional Charge Per Ft | oz | 0.21 |
| Max Length, All Rooms | ft | 262.47 |
| Max Length, One Indoor Unit | ft | 114.83 |
| 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 / 24K optional Zone 4) | ||
| Cooling | Btu/h | 12K: 12000 · 18K: 17100 · 24K: 24000 |
| Heating | Btu/h | 12K: 12000 · 18K: 17500 · 24K: 24000 |
| Power Supply | V | DC 290-380 (all) |
| Power Input | W | 12K: 20 · 18K: 50 · 24K: 50 |
| Air Flow Volume | CFM | 12K: 365 · 18K: 559 · 24K: 765 |
| Sound Pressure | dB(A) | 12K: 42.5 · 18K: 46.0 · 24K: 50.0 |
| Unit Dimension (L × W × H) | in | 12K: 33.07L × 8.07W × 11.61H · 18K: 37.48L × 9.09W × 12.20H · 24K: 42.5L × 9.3W × 13H |
| Net Weight | lbs | 12K: 20.94 · 18K: 26.4 · 24K: 33.07 |
| Liquid / Gas Side | in | 12K: 1/4 / 3/8 · 18K: 1/4 / 1/2 · 24K: 1/4 / 1/2 |
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 (36,000 BTU compressor)
- Three indoor units — 12,000 BTU each
- Pre-charged twist-to-connect line set for Zone 1 (25 ft)
- Pre-charged twist-to-connect line set for Zone 2 (16 ft)
- Pre-charged twist-to-connect line set for Zone 3 (10 ft)
- 220/240V 20-amp power cord (12 AWG) with plug
- 4-lead communication control wire per zone
- Three wall brackets, putty, and mounting hardware
- Three 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 fourth zone in the builder? The extra indoor unit, matching hardware, and its 10 ft line set 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 | $4,445 | 24k | 2–3 zones, 1,000 sq ft | 5°F | 220V (20 amp) | Two or three rooms, one outdoor unit |
| MU36 this page | $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 MU36 | 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 MU36
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 MU36 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 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.
How do I plan the layout for three zones?
Zone 1 gets a 16-ft line set and should be closest to the outdoor unit. Zones 2 and 3 have shorter included line sets that can be extended as needed. Position the outdoor unit centrally to minimize total line set length — think of it like placing a Wi-Fi router for best coverage.
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.
