Toolbox and split models can both generate heat, but they do not solve the same installation task. I therefore start with where the heater will be placed, where the air should go, and whether the solution needs to be permanent.
Toolbox / all-in-one
In a toolbox solution, several components are gathered in a compact unit. This makes it easy to move or use in a more temporary installation. However, it still requires correct power, fuel, combustion air, and exhaust according to the manufacturer's instructions. A box does not make the combustion suitable for a closed room.
Split model
With a split model, the heater itself is placed as part of a fixed installation, while the warm air is led through hoses to the rooms that need heating. This typically provides more options for planning air distribution and concealing the installation in a boat.
What I would base my choice on
| Question | Toolbox | Split model |
|---|---|---|
| Does it need to be moved? | Often ideal | Usually fixed |
| Do multiple rooms need heat? | Depends on the solution | Easier to plan with ducts |
| Do you want to hide the installation? | Less ideal | Often easier |
| Service access | Typically gathered in one place | Must be considered in the placement |
For boat: consider the entire installation
I would always have a handle on exhaust, combustion air, power, fuel, warm air, and a CO alarm before purchasing. If a kit is missing one of the parts necessary for your specific boat, it is not complete for your installation.
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