Ten Spa

How long do wood fired hot tubs take to heat?

How long does it take to heat a wood fired hot tub

Looking to install a wood fired hot tub?

Wondering how long will it take to heat up?

In this blog post, we’ll explore the average heating time for our wood fired hot tubs and provide some tips to help you get your tub up and running as quickly as possible.

Read on to learn more!


Fibreglass wood-fired hot tub heating up duration:

The short answer is approx. 2 – 3 hours to reach a desired temperature from 7.2° C to 38° C (45° F to 100.4° F).

The exact timing would depend on various factors like

a) The size of the hot tub

b) The size and KW power of the heater

c) If the hot tub is insulated

d) The outside temperature and whether

e) Water capacity of the wood- fired hot tub

Smaller 4 – 5 seater hot tubs such as the Tarkine, with its internal 30kw wood fired heater, would heat up to the perfect temperature within an average of 2 hours.

There are factors that you can control to maintain a stable heating output, for example:

Choice of wood planned on for burning, we recommend Birch, we do not advice to use spruce. Although both wood types will burn, spruce may produce weird “popping sounds”

Ensure you have insulated cover, it is designed to keep the temperature in, a lot better then fibreglass or wooden cover.

Stir the water in the wood-fired hot tub occasionally, simply turn on the hydro jets or air pump to stir the water. By doing so you will mix the hot water with cold, It will help to determine an actual temperature faster.

To monitor hot tubs water temperature we recommend using Inkbird or similar. This device will allow you to see the water temperature from the inside of your home as well as whilst in the hot tub, a radio  style thermometer will allow you to see the temperature further away from the hot tub rather then Bluetooth version.

Check out one of our hot tubs in action…

Click on the picture to find one online.


Ten Spa wood-fired Hot tubs approximate heating durations

Tarkine (EX) 5 – 6 seater with it’s external 30kw wood fired heater, would heat up to the perfect temperature within 2 – 2 1/2hours.

Large Daintree 6 – 8 seater with internal with its internal 30kw wood fired heater, would heat up to the perfect temperature within 2 1/2 to 3 1/2 hours.

Large Daintree (EX)  8 – 10 Seater with it’s slightly larger external 37kw wood fired heater, would take approx 2 1/2 to 3 1/2 hours.

What can help heat up my hot tub quicker?

Want it done even quicker then that ? You could:

  • Use a thermal spa blanket.
  • Put a pop-up canopy tent around the tub.
  • Wait for a warm day.
  • Fill up with warm water.
When can I use my wooden hot tub?

You can use your wooden hot tub all year round. It can also be used with hot or cold water. This means you can use it as a refreshing pool in the hot summer months, and as a relaxing hot tub in the cold winter months. We also recommend you combine your hot tub with one of our wooden saunas. There is nothing like going back and forth between a hot tub and a sauna – it is the peak of relaxation.

Will The Water In My Hot Tub Still Be Warm The Following Morning?

Yes!  Ten Spa Hot tubs as standard comes with an internal layer of foam insulation and insulated, foldable leather cover!

Therefore, our wood-fired hot tubs will hold the heat very well, the following morning you will be able to jump back in, depending on when you stopped heating the first time, you might need to start a fire and put a few logs in to get the temperature back to 38 Degrees.


Leave a Reply

Your email address will not be published. Required fields are marked *