What electrical supply does a sauna need?

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What electrical supply do I need for a sauna?


Saunas are pretty low maintenance. And you can install them almost anywhere.

But, if you’ve opted for an electric sauna stove. Then the one thing you do need is a suitable electrical supply. 

This is usually going to be more than your standard 13AMP plug socket unless it’s very small. Or in the case of some Infrared models. So, the chances are you are going to have to get a dedicated wire run out.

 So, what power supply do you need to install for a sauna?

What power supply should I install for my sauna?

That’s the million dollar questions.

The reality is it depends

The size of the sauna you decide to install will inform the stove. And the size of the stove will inform the size of the cable that is needed to power the sauna. 

We strongly recommend that you speak to you sauna supplier and confirm the size. They will then let you know what size of stove you will need to heat that size of sauna. And you can then work alongside them and your electrician to ensure the correct cable size is installed?

But you wanted an exact number right? Not just an it depends.

Most domestic saunas will use a 32AMP supply. But, again, that is based on the size of the sauna and the stove. So please, double check before you install that.

What kind of cable do I need for my sauna?

The cable running to the sauna, will depend.

But, remember that any cable on the inside of the sauna will need to be heat resistant to cope with the high temperatures of the sauna. 

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Do we install your sauna power supply?

Our engineer team consists of electricians. But, we don’t install the power cable to the sauna.

Once we know what size of sauna you are installing we will advise you on what power supply you will need. And we will work with your electrician to ensure that the correct power supply is installed. 

But we can do everything else once you have the electrical supply in place. We can wire in your lights and stove to fully commission your sauna along with everything else. 

So all you really need before is a suitable power supply and floor.

We do the rest.

How much does electrical installation for a sauna cost?

We don’t offer electrical supply, so, you will need to factor the installation price into your sauna budget. 

So, how much will your electrical installation cost?

It depends. Sorry, another it depends.

You’ll need to run a cable from the main board to the location of your sauna. 

Installation costs are approx. £35+VAT/hour, plus material for a qualified electrician. A simple electrical install would take approx 4 hours. But this will depend on a few factors. The overall cost for electrical installation will usually be somewhere between £180+VAT to £800+VAT on average. 

The exact price for cable installation will vary depending on a few things:

1. Whether you use a proper qualified electrician (we always recommend you do us a certified electrician this for both safety and regulation).

2. The distance from the main electrical board to the sauna.

3. The complexity of the install path (eg. Is there a direct route, or do you need to go through loft space, underfloor space or outside).

4. Does a new breaker need installed?

These factors will affect the overall cost. And will be discussed with your electrician on the initial site visit.

Do we recommend anyone?

Luckily our next door neighbours are qualified electricians. So if you need someone to help you out with your electrical installation for your sauna then get in touch with Eastwood Electrical.

Any problems with sauna electrical installation to consider?

There are very few problems that can’t be fixed. But there are a few things that you should consider regarding your electrical installation and the positioning of your sauna. 

1. Your property has a limited power supply

hot tub electrical supplyAll properties have a limited power supply available. For most it is 80-100 AMPS. This amperage needs to supply all the electrical items including the showers, cooker, televisions and hairdryers etc. Some homes and commercial properties may have a 3 phase supply which will triple the power supply available. 

It’s unlikely you will have all your electrical items, including your sauna, on at the same time. But if you overload your electrical board your house electricity will trip. Which you don’t want. 

It’s also important to note that even if you sauna does require a 32AMP supply it might not draw this full amount. A 6kw stove draws roughly 28MAP, but it’s not possible to install this. So although a 32AMP supply is installed, it will only draw around 28AMP. 

Most homes will be capable of having a sauna installed. But if you have an unusually high number of electrical items then double check with your electrician and sauna supplier to ensure you have the electrical capacity.

2. Have the sauna as close to the main board as possible

The further the distance from the main electrical board to the sauna, the less likely that it will be a straightforward path for installation. You probably don’t want the cable to be on show, so it is likely that you will have to pass it through the loft or underfloor space if available, or outside of the house and back in through a suitable location to the sauna. Again, making the installation more expensive. 

Plus the further the cable from the main board the lower the voltage. This will have a minimal impact in most cases. But if it does the cable size will have to be increase, which will increase the cost. 

There is almost always a solution to these problems, but they are worth considering as it may make your electrical installation more expensive. 

In summary

Annoyingly there is no one size fits all for sauna power supplies. 

What I can say, is that it is unlikely you will be using a standard plug-in 13 AMP, unless you are using a kit infrared. So the chances are you will have to run a power cable off the mains.

But, what size this power supply is will depend on the size of your sauna and stove. 

First step. Decide what size of sauna you want/can fit. Then your supplier will be able to advise on what power supply you need to install to safely power your sauna.

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Debbie Ekins
Debbie Ekins
Eagle Leisure - Sales & Marketing Manager Mission = to arm you with the knowledge you need to make the best buying decisions. Fuelled by coffee (and naps). Explorer of Scotland and the world.
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