Pre-order Pre-orders are open: pay nothing until it ships. Reserve yours
Pricing

€99 once. Then it pays you back.

Buy the device and use the core features free, forever. Add Pro only if you want the savings in euros, mould protection and the AC health check. 30-day money-back guarantee, 2-year warranty, volume pricing from ten units.

30-day money-back guarantee 2-year warranty Nothing charged until it ships
Starter
€0forever

Everything you need to start saving.

  • AC switches itself off when the apartment is empty
  • Any AC on your phone, from anywhere
  • Saved-hours log, 30-day history
  • Intrusion alerts when you arm it
  • Mobile app + web dashboard
  • Firmware updates over the air
Reserve the device — €99
Most popular
Pro
€49/year per apartment

For hosts who want proof, and fewer surprises. Less than €1 a week.

  • Everything in Starter
  • Savings in hours, kWh and euros
  • Mould-risk alerts and the climate guard
  • The AC health check
  • 12-month history
  • Priority support
Reserve with Pro — €99 + €49/yr
Property Manager
€4/unit per month, billed yearly

For portfolios of 10 units and more.

  • Everything in Pro
  • Every unit on one screen
  • Portfolio-wide savings, exported to Excel in one click
  • Volume hardware pricing at 25+ units
  • 3-year data history
  • Priority phone + Slack support
Talk to sales

All prices exclude VAT. EU shipping €9, worldwide €19, tracked. Pre-orders ship in order of reservation and nothing is charged until yours does. 30-day money-back guarantee on the device; cancel any plan anytime.

Live calculator

What would you save?

A conservative estimate: 22 % less AC energy, the middle of the 17–30 % that independent studies report. Hot climates and careless guests push it higher.

Your property

Bookings per month 6
Average stay length 4
nights
AC capacity 2.5 kW
2.5 kW (9 000 BTU) · ~15–25 m²
3.5 kW (12 000 BTU) · ~25–35 m²
5 kW (18 000 BTU) · ~35–50 m²
Electricity rate €0.32/kWh
EU average ~€0.28 · NL ~€0.32 · DE ~€0.35

Estimated monthly savings

€0
Why it saves

In hotels, half the AC hours cool an empty room.

Guests go out and leave the AC on. Measured across tens of thousands of hotel nights, that habit is where the saving comes from.

~50%
of booked hotel hours run the AC with nobody in the room
<1 in 10
hotel guests switch the AC off when they go out
17–30%
less AC energy when the AC follows the room

Sources: SensorFlow, 64,000 hotel room-nights; US Department of Energy / PNNL, a field study of hotel guest rooms (2012); a long-term field test of presence sensors in a home (2024). Your result depends on your climate, your guests and your AC. That is why Cerloq measures your own hours instead of promising ours.

Frequently asked

Questions answered.

Will Cerloq One work with my AC?
Yes. Most hosts pick their unit from the built-in library of 200+ models across 39 brands — Daikin, Mitsubishi, LG, Samsung, Panasonic, Gree, Midea, Toshiba, Hitachi, Fujitsu and more — and it is ready in seconds. If your model is not listed, teach Cerloq the buttons from the AC’s own remote: off and cool are enough for the automation, all five give you full control from your phone.
How long does setup take?
About five minutes: plug it in and scan the code with the app (~2 min), pick your AC or teach it the remote (~1 min), choose quiet hours and what to do with an empty room (~1 min), then step out for a one-minute calibration. A cleaner can do the physical part with the quick-start card; the app part can be done from anywhere once the device is online.
Do I need to be at the property to install it?
You can ship Cerloq One directly to your property and have your cleaner unbox + plug it in. Setup runs from a single QR code on the device + the Cerloq app on your phone. The cleaner doesn't need any app or account.
What if the property loses internet?
Your settings and the presence sensing live on the device, so the AC automation keeps working with no internet at all. Remote control and alerts need the connection and resume the moment it is back. Worst case: you miss real-time alerts during the outage while the device keeps doing its job.
Why is there a paid plan?
The device and the core features are free forever. Pro pays for what costs us money all year: the servers behind the savings in euros, the protection extras and the longer history. Cancel anytime; the device keeps working on Starter.
Can I cancel and keep the device?
Yes. The hardware is yours. You can downgrade from Pro to Starter at any time and continue using all the basic automation features at zero cost. The device is functional with or without the subscription.
How accurate are the savings figures?
The hours are measured, not modelled: the device logs every interval where the AC was running, the room was empty and it switched the AC off — and when in doubt it counts less. Euro figures follow from your AC’s capacity and your tariff, so those are estimates; the hours are not. The ranges on this site use the conservative 22 % mid-point of independent studies.
Does Cerloq have a camera or microphone?
Neither. Presence is sensed by a 24 GHz radar that produces no image, and whether someone is in the room is used by the device itself — it is never streamed to you or to us. No audio or video is collected, transmitted or stored, and your data is never sold or shared with advertisers.
What's the warranty?
2-year hardware warranty. EU consumer law also gives you statutory protection on top. We'll replace any unit that fails due to manufacturing defect, no questions asked. To claim, write to us with your order number.