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How to Heat a Small Bathroom

Heating a small bathroom can actually prove to be quite the delicate balance, as it is far easier than you may think to either overcompensate or under-provide when it selecting the optimal small bathroom heating units for your spatially slender bathing arena.

But before we get to all that, let us equip you with the one tool you need to make your search a whole lot easier – both for your small bathroom and any other room whose radiators you wish to renew in the future…

BTUs & You

As we browse some of our fantastic stocked items in this article, do keep in mind that the key to accurately heating small bathrooms is calculating the correct BTU that the size of your bathroom requires.

A BTU or British Thermal Unit is used to measure thermal energy and equates to the energy needed to raise 1lb of water by 1°F at sea level.

You can easily discover the BTU amount that your small bathroom requires by measuring its dimensions then entering them into our handy BTU Calculator. Once you have your figure in mind, you can then cross-reference it with the BTU readings put out by each of our radiators.

You can find this figure listed in the product description of every radiator on our online store. And you can then prep your small bathroom heating with new levels of accuracy.

Heated Towel Radiators

Let us begin with the king of small bathroom heating options – the heated towel radiator. These fantastically versatile units are the most common bathroom heating method and work superbly for small bathroom heating due to their compact size.

Let's take a look at some customer favourites below.

Brenton Avezzano White Flat Panel Heated Towel Rail - Gloss White (LEFT)

Crafted from durable carbon steel, the Brenton Avezzano is the perfect addition to small bathrooms. This delightful slice of luxury boasts a minimalist white finish, a high heat output for warming towels and keeping the room nice and toasty, alongside a rather reassuring 5 year manufacturer's guarantee for peace of mind. The Avezzano can also be used as a dual fuel towel rail so you can keep your bathroom cosy all year round.

Brenton Apollo Electric Straight Chrome Heated Towel Rail (CENTRE)

Chrome heated towel radiators offer a sublime element of luxury perfect for the bathroom. Made from sturdy steel and pressure tested to 10 bar, the Apollo boasts a plethora of impressive features, an uber-aesthetic design, and a comforting 5 year manufacturer's guarantee to assure you of its quality.

Harbour Status Flat Heated Towel Rail - Brushed Brass (RIGHT)

This stunning piece is a popular choice with our customers due to its striking design. Not only does this Harbour Status towel rail Diva look stunning thanks to its contemporary brass finish, but it also boasts a plethora of wonderful features including a high heat output to ensure your bathroom is super toasty, alongside a 8 year manufacturer's guarantee to keep your mind at ease. 

To discover countless more of the best towel rails for small bathroom heating, head to our site to find our full range of towel rails. Whether you are seeking a traditional towel radiator to match your small bathroom style or a modern designer towel radiator to launch your intergalactic bathroom design, Only Radiators has you covered – simply keep that BTU figure in mind and go wild.


And now for something totally different…

Underfloor Heating

Underfloor heating doesn’t get quite the amount of attention that perhaps it should, yet is an unmistakable quality option when it comes to heating a small bathroom.

As you may have discovered in our earlier blog on the topic, underfloor heating is often a more cost-effective option when heating smaller bathrooms – and here’s exactly why…

The electric design of underfloor heating enables you to reach a room’s required temperatures significantly quicker than traditional radiators, and its totally confusion-free installation makes for a low maintenance approach.

Overall, it is the simplicity of an underfloor heating system that defines its appeal – simply lay your underfloor heating cut to specific sizes just like you would a rug.


Remember that underfloor heating must be laid before the floor itself, meaning that it isn’t the best option if you’ve just shelled out on a swanky new tile floor for your small bathroom. If you’re still in the construction phase, it’s a great option. If not, then you’ll just have to stick with our range of stunning towel radiators. Poor you…

All Year Round

With your small bathroom being such a versatile space, why not ensure that your small bathroom heating is every bit as flexible?

Most of the heated towel radiators that we stock at Only Radiators are dual fuel-compatible, meaning that they can be run either electrically or via your central heating for total year-round flexibility.

And of course, the thermostatic control panel that you fit alongside your underfloor heating will unlock just as much small bathroom heating flexibility – so you need not crank on the central heating every time you wish to heat your small bathroom.

Consider the position of your small bathroom within your home and you will be able to hone in further on the level of heating provision required. Is it nestled in a warm nook between an often-populated kitchen and living room – or is it at the very top end of your home next to a couple of seldom-used spare rooms? Dual fuel may be more essential in one case, while traditional supply may be fine in others.

Small is the New Huge

Once you focus in your search with our BTU calculator and narrow down the level of heat provision you require, then spec-ing your small bathroom heating will become a joy.

Take your time and everything will be just fine – that is exactly what we have been telling our customers for years as we help them create the most beautiful, warm and inviting small bathroom designs – from radiators and underfloor heating to bathroom rugs and so much more.

Here to Help

Our friendly support team are here at all times to help you with your query so please do not hesitate to reach out to us right here.

Whether it is design advice that you seek or some technical information regarding a potential new dual fuel towel radiator for your small bathroom heating – we will be delighted to provide our two cents.

Your Leading Heating Source

As always, keep checking up on the Only Radiators blog time and time again for industry-leading home heating ideas, and sign up to our newsletter for exclusive news, money-saving tips, competitions and much more!

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