Thinking about a steam shower or steam room? Getting the right size steam generator is key to creating the perfect experience. The size of your space and the materials you use play a big role in determining what you need.
That’s where our Free Online Steam Generator Sizing Calculator comes in. It’s designed to make the process simple. Just enter your room measurements, answer a few easy questions, and hit “Calculate.”
Our calculator will not only give you the exact size generator you need but also recommend the perfect product to match your setup. It’s quick, accurate, and takes all the guesswork out of choosing the T-Shirt for your home.
Try our Steam Generator Size Calculator and take the first step towards your dream steam shower or steam room.
Simply Enter your dimensions in millimetres (mm)
Want to crunch the numbers yourself?
Follow the steam generator sizing guide below.
This is done by calculating the cubic metres of your proposed steam shower or steam room.
Step 1
Take the measurements and multiply them in this order – length x width x height (in mm).
Step 2
Make adjustments depending on the finish of the walls of your enclosure.
- Material. For natural stone or marble/granite finish, multiply the total by 2. For ceramic, porcelain tile, and glass blocks, multiply by 1.35. For other materials, such as man-made wall panelling, use 1.25 to be on the safe side.
- Exterior Walls. For one exterior wall, add 10%, and for two exterior walls, add 20%
For example, if we choose an enclosure that measures 1500 mm × 1000 mm × 2400 mm (L × W × H) with ceramic tiled walls and one exterior wall:
- Calculate the volume: 1500×1000×2400=3,600,000 mm
- Convert to cubic metres: 3,600,000÷1,000,000=3.6 m3
- Adjust for wall finish (ceramic tiles): 3.6×1.35=4.86 m3
- Adjust for one exterior wall: 4.86+(4.86×0.10)=5.35m3
If you are still stumped on this one, use the calculator above or drop us a message with your dimensions, wall finish, and number of exterior walls. We will be happy to assist.
Step 3
Select the steam generator size that meets the final figure you have from step 2.
If you are on the high end of these figures, you are advised to step up to the larger KW generator.
| Generator Size | Cubic Metres (Adjusted) |
| 3kw | Up to 3.5 m3 |
| 6kw | Up to 7 m3 |
| 9kw | Up to 10 m3 |
| 12kw | Up to 14 m3 |
| 15kw | Up to 19 m3 |
There are a couple of extra things you will want to take note of. First is that if there is a skylight or a window leading outside, choose the next size up with regards to the generator. The glass of the window must also be double-paned and sealed internally, but ideally, a space without either of these is better.
The voltage of your generator must match that of your current utilities; otherwise, you risk tripping the power. As a rule, the voltage in the UK will tend to be anywhere from 220v to 240v. All the steam generators and steam room kits we supply are 230-240v
As mentioned before, the maximum height of the ceiling should be around 2.4 metres for your steam shower. However, this can be pushed to 3 metres with a powerful enough generator. It cannot exceed this height as there is not a generator powerful enough for this.
Disclaimer
The Steam Generator Size Calculator is designed to provide general guidance only. Due to variations in construction and materials, the sizing recommendations should be used as a guideline. We cannot be held responsible for any issues or claims arising from the incorrect sizing of a model based on these results.
