Planning · Updated 10 November 2026

Portable toilet in winter: fan heater, frost, location

A portable toilet also works in frost. Four things change in winter: the sanitary fluid, the service interval, the equipment and the demands on the location. Sort that out in October and you have no trouble in January.

Frost

What happens below zero

The cabin itself is not damaged by the cold. What matters is what is in the tank.

In persistent frost we switch the sanitary fluid to a frost-proof mix so that the tank contents do not freeze and odours stay bound. This happens during the regular service, you do not need to arrange anything. At very low temperatures we also adapt the service interval, because biological breakdown in the tank slows down.

Equipment

Which add-ons help in winter

Two add-ons make the difference as soon as it gets cold and dark early.

  • Fan heater: keeps the cabin usable in frost. €7.50 per week net on a long-term rental, €20.00 net on a short-term rental. A power connection on site is required.
  • Light: once the clocks go back it gets dark around 4 pm. €4.00 per week net on a long-term rental, €10.00 net on a short-term rental. Also needs power.
  • Hand sanitiser and soap dispenser: useful if the hand-wash station is not to be operated in winter.
  • Combination lock: protects the cabin on sites that are unattended in the dark season.

Hand-wash stations carry fresh water in a tank. In persistent frost we recommend hand sanitiser in the cabin instead, so that nothing freezes. All prices and add-ons are listed in the price overview.

Location

What a winter-proof location needs

In summer the access is a formality, in winter it is the difference between service and failure.

Our service vehicle must be able to get within seven metres of the cabin, even in snow and mud and even once materials are stored there later on. Choose a paved spot by the access, not behind the materials store and not on unpaved ground that softens in a thaw. If you choose the location wisely in autumn, you do not have to move anything in winter.

Festivals and markets in winter

Christmas markets and winter festivals usually run for four weeks and are therefore long-term rentals with weekly cleaning. Light and fan heater are part of it, and at public events also an accessible cabin with a level approach. More on this in the article “Toilets for the Christmas market”.

Frequently asked questions

Can the cabin stay in place over winter?

Yes. In persistent frost we adapt the chemicals and the service interval, and the fan heater add-on keeps the cabin usable. What matters is a location that remains accessible even in snow and mud.

Does the fan heater need power?

Yes. Fan heater and light are the only add-ons that need a power connection on site. The cabin itself works without water or power.

What does the winter equipment cost?

On a long-term rental the fan heater costs €7.50 and the light €4.00 per week net. On a short-term rental €20.00 and €10.00 net flat rate.

Does the hand-wash station work in frost?

In persistent frost the fresh water in the tank can freeze. For winter we recommend hand sanitiser in the cabin or a sheltered location for the hand-wash station.

Next step

Question answered? Then on to the specifics.

One call and you know which unit fits, what it costs and when it will be on site.

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