Choose onesous vide cookeris not just a question of budget. The real subject is elsewhere:what type of device corresponds to your actual use? Between the compact immersion heater and the all-in-one water tray, between 8.5 L and 28 L, the difference in comfort can be enormous depending on the volume you cook and the frequency of use.
Sous vide cooking allows for precision that is difficult to obtain otherwise: regular meat, more delicate fish, better controlled vegetables, more stable long cooking. But you still need to choose the right format from the start to avoid an undersized appliance... or on the contrary too bulky for your kitchen.
The first choice to make: immersion heater or water tank?
Before even comparing liters or power, you have to choose between the two main families of devices.
| Solution | Benefits | For whom? |
|---|---|---|
| Immersion heater | Compact, flexible, easier to store, often less expensive | Individuals, small kitchens, mobile use, first tests |
| Water tray / water oven | Dedicated station, better insulation, less evaporation, more comfort | Regular use, demanding enthusiasts, sedentary professional cooking |
If you especially want to understand what a sous-vide stick actually does in a kitchen, our articleImmersion heater: what is it really used for in sous vide cooking?is a good complement.
Option 1: the immersion heater, the most flexible choice
The immersion heater attaches to a saucepan, pot or gastro container. It heats the water and circulates it to maintain an even temperature throughout cooking.
It is often the best entry point into low temperature cooking for three reasons:
- it takes up little space;
- it adapts to several containers;
- it allows you to start without a permanent dedicated station.
For a domestic kitchen or occasional but serious use, it is often the most rational format.

- Simple format to get started properly
- Good solution for containers up to 20 L
- Excellent precision / size compromise
If you cook often, in larger volumes, or in a more demanding context, switching to a reinforced model may be relevant.

- More stability on large volumes
- Reinforced water circulation
- Suitable for frequent or professional use
Option 2: the water tray, the comfort of a dedicated station
The water tank, also called a water oven or autonomous sous vide cooker, directly integrates the tank, heating and temperature control. It’s more bulky, but also more comfortable if you often use sous vide cooking.
Its advantages are clear:
- better insulation, therefore less thermal losses;
- less evaporationon long cooking;
- stable and ready to use station;
- “cleaner” experience on a daily basis.
If you want to explore this logic of dedicated equipment in more depth, the articleWhy choose a sous vide bain-marie for precise cookingis particularly relevant.
Choose the right capacity: 8.5 L, 12.5 L or 28 L?
Once the type of device has been chosen, capacity becomes the second real criterion. Here again, you have to think according to the quantities, the size of the pieces and the comfort of circulating the bags.
8.5 L: the compact format for family use
A compact model is often enough for a household meal, steaks, fish fillets, vegetables or a few portions prepared in advance. This is a good choice when space is limited.

- Small footprint
- Very good for domestic use
- Simple and intuitive format
12.5 L: the versatile format
The 12.5L is often the best balance. It allows you to cook long pieces or several bags at once more comfortably, without immediately using a very bulky machine.

- Very comfortable all-purpose format
- Suitable for longer pieces
- Good capacity without excess bulk
28 L: for large volume
At 28 liters, we enter into a caterer, restaurant or more sustained production logic. This type of equipment is useful when quantities are large, cooking is repeated or the pieces are bulky.

- Volume suitable for large productions
- Very comfortable thermal stability
- Good solution for intensive use
Technical criteria not to be neglected
Whatever format is chosen, three criteria must remain non-negotiable.
- Temperature accuracy: this is the very basis of sous vide cooking. A stability of 0.1°C makes a real difference to the results.
- The power: the faster the device heats up, the more efficiently it reaches and maintains its temperature, especially on large volumes.
- Circulation or thermal regularity: the objective is to avoid cold zones and to obtain uniform cooking throughout the tank.
Simple rule:If you don't cook much but want flexibility, get an immersion heater. If you cook often and want comfort, take a water tray. If you cook in quantity, first look at the capacity and thermal stability.
Which sous vide cooker to choose according to your profile?
| Profile | Logical choice | For what |
|---|---|---|
| Beginner at home | 1000W immersion heater | Simple, compact, economical and versatile |
| Regular individual | 12.5 L cooker | More everyday comfort and good capacity |
| Intensive / professional use | Pro or 28 L immersion heater | Better hold on volume and repetition |
If you're really starting from scratch, ourbeginner's guide to low-temperature sous-vide cookingcan also help you choose with more perspective on actual use.
Don’t forget the right cooking bag
Good sous vide cooking always starts with good vacuum packaging. You must use suitable, heat-resistant bags that are compatible with your machine.
For use with an external suction machine, embossed rolls remain a safe bet for making bags of the right size.
See the 30 cm embossed vacuum rolls
Need the right equipment for sous vide cooking?
Discover our selection of immersion heaters, compact cookers and sous vide bain-marie according to your level and volume of production.
View sous vide cookersFAQ for choosing a sous vide cooker
What is the difference between an immersion heater and a sous vide cooker?
The immersion heater attaches to an external container, while the autonomous sous vide cooker directly integrates the tank and heats it in a single device.
What capacity should I choose for a family?
For many family uses, 8.5 L is enough. The 12.5 L becomes more comfortable if you cook more often or cook longer meals.
Is an immersion heater enough to get you started?
Yes, very often. It’s even the simplest and most flexible option to get started without cluttering up the kitchen.
Is the water tank reserved for professionals?
No. It is also suitable for passionate individuals who cook regularly and want a stable, quiet and more comfortable station for long cooking periods.

