Such a boiler (B.U.) I installed in my the garage. He drowned with wood, coal, gas from a cylinder. He removed the upper shell from the boiler in order to increase the heating area of the boiler. But it is very annoying (firebox), especially at night. I decided to electrify my boiler.
The top of the boiler has a cover that is bolted through the gasket. He removed this lid and welded on it (after making the necessary hole in it) the box. In it on the side, made three holes for a standard electro-electric heater. Each heater has its own temperature controller. I have three phases, each ten connected to its phase. But this is not critical, it is possible both conveniently and in one phase.
It turned out like this.
I have already inserted a new outlet of hot liquid at the upper point of the box. I put the circulation pump and the system worked.
Each regulator is set to the desired temperature. It really helped me out. Safe and dust free.
And the money is not "scary". At the same time, the boiler furnace is saved and it is possible to “help” to heat. Option (photo) on kerosene (salar).