Home saunas and cold plunge tubs
Heat. Cold. Repeat.
Home saunas and cold plunge tubs for UK gardens, opening November 2026.
Birch: the heat
Saunas
Barrel, cabin and infrared. Electric or wood-fired.
Berg: the cold
Cold plunge tubs
With or without a chiller, for the cold half of the ritual.
Why Birch & Berg
Everything you need to know, before you buy.
We won't sell the cheapest. We'll sell the one you won't regret.
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Know before you buy
Every product page will show the dimensions, the weight, the power supply it needs, the base it needs, how it's delivered and what a return would cost. If something isn't there, email us and we'll find out.
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Delivered direct
Straight from the maker's workshop or warehouse to you, with the delivery booked with you in advance.
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One point of contact
You buy from Birch & Berg, so we're your contact from order to delivery and after it. If there's a problem, email us and we'll deal with the maker for you.
The range
What we'll sell
A small, carefully chosen range at launch, with a full page of facts for every product.
Heat
- Outdoor saunasBarrel and cabin designs for the garden.
- Infrared saunasIndoor cabins for a spare room, garage or garden building.
Cold
- Cold plunge tubsWith or without a chiller, for the cold half of the ritual.
Sauna, then cold water, the Nordic way.
Buying guides
Everything to check, before you buy.
Free, sourced guides for UK buyers: choosing a sauna or cold plunge, the base, the electrics, planning rules, running costs and delivery.
- Saunas
How to choose a garden sauna: a UK buyer's guide
Barrel, cabin or infrared; electric or wood-fired; what size, what base and what power supply. Everything to check before you buy a garden sauna.
Read the guide - Cold plunge
How to choose a cold plunge tub: a UK buyer's guide
Chiller or ice, which tub material, what size, how heavy it gets, what power it needs and what it costs to run. What to check before you buy a cold plunge tub.
Read the guide - Running costs
How much does a sauna cost to run? (UK, 2026)
What an electric, infrared or wood-fired sauna, and a cold plunge chiller, costs to run at the Ofgem price cap from 1 October 2026, with a formula for any model.
Read the guide - Planning
Do you need planning permission for a garden sauna? (England)
When a garden sauna needs planning permission or building regulations approval in England: heights, boundaries, designated land, listed homes and electrics.
Read the guide - Base and siting
What base does a garden sauna or cold plunge need? (UK guide)
Concrete slab, paving, timber deck or ground screws: which base suits a garden sauna or cold plunge, how heavy a filled tub gets, and how to get it level before delivery.
Read the guide - Electrics
Sauna and cold plunge electrics: a UK guide
Single or three-phase, 13A plug or dedicated circuit, RCDs, outdoor sockets and Part P in England: what power a garden sauna or cold plunge chiller needs.
Read the guide - Chillers
Cold plunge chillers explained: capacity, water care, noise and running costs
What a cold plunge chiller does, how cold it gets, how it keeps water clean, how loud it is, where to put it and what it costs to run at the Ofgem price cap from 1 October 2026.
Read the guide - Delivery
Pallet delivery: what to expect when your sauna or cold plunge arrives
How kerbside pallet delivery of a sauna or cold plunge works: booking the date, the tail-lift lorry, moving it from the kerb, checking for damage and getting your base and route ready.
Read the guide - Cold plunge
Cold plunge or ice bath: which is right for you? (UK guide)
Ice in a tub or a chilled plunge? What ice costs per session, what a chiller costs to run, water care, space, noise and weight, and a table to help you choose.
Read the guide - Trade
Saunas and cold plunges for holiday lets, gyms and studios (UK)
Adding a sauna or cold plunge to a holiday let, gym or studio? Safety signs, supervision, insurance, electrics, water hygiene, planning and a spec checklist.
Read the guide
Trade and suppliers
Makers and distributors: we're building our launch range.
Birch & Berg will sell online to UK customers from November 2026. We'd like to hear from makers and distributors of garden saunas, infrared saunas and cold plunge tubs, particularly those who can deliver direct to UK customers.
- Trade enquiries
- hello@
birchandberg.co.uk - Company
- Implement Ascend AI Ltd, trading as Birch & Berg. Registered in England and Wales, company number 17095239.
View the Companies House record - Launch
- November 2026, online, delivering in the UK.
Launch list
Join the launch list for £50 off.
We'll email you when the shop opens in November, with a £50 code for your first order. We'll only use your details for that.
£50 off your first order of £1,000 or more at birchandberg.co.uk. For people who join the launch list before the shop opens. One code per household, emailed at launch and valid until 31 January 2027. It can't be exchanged for cash or combined with other offers.
The sign-up form is hosted by Google Forms. Prefer email? Write to hello@birchandberg.co.uk with the subject “Launch list”.