Sauna booking system – Self-service sauna rental

All four work the same way at the door: each booking gets its own code for a key box that holds the sauna key. The key box runs on batteries, so it needs no power or Wi-Fi – on a raft, by a lake or on a trailer. What differs is how the sauna gets warm and what to sort out before you open.

Wood-fired: with nobody on site, guests light the stove themselves, so make the session long enough to heat up and enjoy it – often 2–3 hours – and add a break after each booking for the stove to burn down. A woodshed with its own Igloohome lock gives every booking at the location its own code for the shed, so it's simplest to count the wood in your session price. Or do as Grebo Bastubåt does: one key box on the woodshed holds the keys to both the shed and the sauna. Ask for a photo at return to see how each guest left the sauna, so you can clean and restock on rounds that suit you instead of after every booking.

Electric: Rentalbuddy can start a Harvia heater on a Fenix control panel before each paid booking (beta) – how heater control works ↓. Heaters from other makers are started on site, or in the maker's own app.

Floating or mobile: see floating saunas ↓ and mobile saunas ↓.

With Rentalbuddy, one sauna with its key box is one lock – Starter, 299 SEK a month excl. VAT (248 SEK paid yearly), with no commission. A woodshed with its own lock counts as one more, still within Starter. On top come Igloohome's code fee of about 20 SEK a month per lock and Stripe's fee: about 14–27 SEK on an 800 SEK session paid by card, or 7 SEK by Swish. The key box is bought once – Igloohome's EU shop lists the Keybox 3 at €159 (October 2026). Rentalbuddy works wherever Stripe accepts businesses from your country, in your own currency; rental businesses use it in Sweden, Norway, Switzerland, Germany and the UK, and in the US and Canada.

Every fee for one sauna, with a worked example · What could one sauna leave you?

Rentalbuddy is built for saunas with nobody on site, rented out whole by the session: every booking gets its own code for a battery-powered key box, so there's nothing to wire, and you pay a fixed plan instead of a share of each booking. At an 800 SEK session, three bookings a week, the 299 SEK plan is about 2.9% of what guests pay, and the share falls as you get busier. Sauna-session systems such as Periode and Gibbs are built for selling seats in shared sessions, drop-ins, punch passes and gift cards. Some also give each booking its own code – Periode with Inlet or Lokalkontoret locks, Gibbs with a keypad lock on 12 or 24 V that needs Wi-Fi – and Periode charges a share of every payment instead of a monthly fee. Rental platforms such as TWICE charge a monthly fee per location plus 1.5% of each payment, and connect smart locks through an API without naming a lock maker. Rentalbuddy rents out the whole sauna by the session, and its key box runs on batteries with no wiring or Wi-Fi. Renting out a woodshed, kayaks or SUPs beside the sauna? They go on the same plan and the same booking page.

How Rentalbuddy compares with other booking systems →

Yes, with a Harvia heater on a Fenix control panel (beta). You need the panel on Wi-Fi and Harvia's MyHarvia Control subscription. By default, Rentalbuddy emails you a button before each paid booking; press it and the heater starts from wherever you are. Or switch on Automatic start, and Rentalbuddy starts it a set time before each paid booking (45 minutes unless you change it). It switches off when the booking ends, and guests see its status on their unlock page. Depending on how its door contact or safety switch is set up, a Fenix panel can block remote start after a session, so check with Harvia or your installer first. Heaters from other makers, such as HUUM, aren't connected.

Fix the key box at the gangway or on the sauna's outside wall, where waves and spray can't reach the keypad, and keep the key to the sauna door in it, as Bastuflotten Mariestad does. Put the key on a floating keyring, and ask for a photo of the key back in the box when guests confirm their return, so you can see it's there before the next guests arrive. The key box runs on batteries, so you need no power or Wi-Fi out on the water. Add water-safety rules to the terms renters accept, as for any sauna by the water: no swimming alone, children only with an adult. Storm or strong wind forecast? Close that day in the admin and move or refund its bookings from your phone – their codes follow.

Still planning the raft? First agree the mooring with the marina or landowner, and ask whether the raft may stay in the water when the lake freezes. Jetty behind a locked gate? Ask the marina whether its gate key or tag can go in a second key box outside the gate: every booking gets its own code for that box too, and it counts as one more lock on your plan – the sauna and the gate are 2 locks, still Starter. Ask the municipality early whether the raft needs a building permit or a shoreline-protection exemption. Still choosing a raft or a sauna? Ask us – we can put you in touch with sauna builders we work with.

Yes, both. Parked where guests come to it: fix the key box to the outside of the sauna, away from the stove pipe. It runs on batteries with no Wi-Fi or power, so it travels with the sauna. Keep a hitch lock on the trailer while it stands parked. Parking it by a lake for a whole season? Agree the spot with the landowner, and ask the municipality early whether it needs a building permit or a shoreline-protection exemption – a trailer that stays put for long can count as a building. Moving it? Move your location's pin on the map, and the Directions button in new confirmation emails leads guests to the new spot; tell guests who booked before the move where it now stands. It's still one location on your plan. What could it earn by the session?

Towed away by customers for a day or a weekend: run it like a rental trailer. The key box holds the keys to the hitch lock and the sauna door, so it's still one lock. Ask for the towing car's registration number when they book, put in your terms that the driver's licence covers car plus trailer, and sell firewood – or delivery and pick-up – as extras. What could it earn towed away?

A hot tub on a trailer works the same way: an Igloohome padlock on the hitch lock, or a key box with the keys to the hitch lock and the cover, so every booking gets its own code – one lock on Starter, 299 SEK a month excl. VAT, with no commission. Sell firewood, delivery and pick-up as extras, ask for the towing car's registration number, and leave a break after each booking for emptying and cleaning. Towed-away saunas and hot tubs often rent for 1,300–2,000 SEK a day in the Nordics (public price lists, October 2026).

A tent sauna or another portable sauna for hire? Keep it packed, with its stove, in a locked shed, garage or box: each booking's code opens the padlock on the door, customers collect it and bring it back, and you check it on rounds that suit you – one lock on your plan. Put pitching and stove rules in your terms and a short video before the code, and tell your insurer that customers set it up themselves.

Yes, with fresh batteries and a sheltered spot. The Keybox 3 needs no power or Wi-Fi, is rated IP66 against dust and rain, and runs on four AAA batteries for up to 12 months – but Igloohome rates those batteries only down to −10 °C. For a winter sauna, fit fresh alkaline batteries before the cold sets in, check them more often and mount the box where snow can't bury the keypad; a key box with flat batteries can be jump-started over USB-C. Ask guests to brush off any frost before they type the code. Often colder than −10 °C where you are? Talk to us before you buy locks.

At a self-service sauna with nobody on site, rent out the whole sauna by the session – Bastuflotten Mariestad, for example, charges 600 SEK for three hours for up to six people. Hosted sessions, such as a guided sauna evening, can take a price per person, with adult, child or member prices.

Plan for it the way you would for any sauna with nobody on site. Put your sauna rules – lighting the stove, the damper, water, leaving the sauna – in the confirmation email, and if you like in a short video guests must watch before their code appears. Add an age limit to your terms, fit a smoke and a carbon monoxide alarm in the changing room, keep a fire blanket or extinguisher by the door, and tell your insurer that guests heat the sauna themselves.

Gift vouchers work through a promo code, season passes as a membership. For a voucher, take payment your own way – by Swish or in your web shop – and give the buyer a promo code for a fixed amount that works once; whoever gets it types it in when they book, and if the booking costs less, the rest isn't saved. For regulars, sell a membership in your booking window: paid once, it takes a set percentage off every session they book with the same email address, for the months you choose. There are no punch cards, session packs or unlimited passes.

Yes. Fit an Igloohome key box by the door before delivery – no wiring, no Wi-Fi – and your buyer pairs it in the Igloohome app, signs up and takes bookings. Their questions about bookings, payments and codes come to us, not you: setup help and support are included in their plan. Building electric saunas? With a Harvia heater on a Fenix control panel, Rentalbuddy can start the heat before each booking (beta) – check what remote start needs ↑.

Put your buyer's price and what the sauna costs into the calculator and send them the link: it shows what the sauna could leave them and when it's paid back. Want to look after your buyers' booking systems for them? With a partner account your team works in the accounts you look after, and we can help you put a package together. And when someone asks us where to get a sauna, we put them in touch with builders we work with – Bastuspa in Södertälje, for one, sells sauna trailers, sauna rafts and fixed saunas ready to rent out with Rentalbuddy, and offers to finance the sauna and the booking system through its credit partner (bastuspa.se, October 2026). How sauna builders work with us · Talk to us about partnering