Even at this distance, he could feel the heat from the boiler through his clothing.

The pipes leading to and from the boiler are usually 28mm (or even 35mm).

A person can then access hot water from the boiler through a tap.

"There's a coil from the boiler running through the tank," he said.

The high pressure steam coming from the boiler is expanded in the nozzle first.

The whole tank was getting warm, and not just from the boiler.

Judging by the flames coming from the boiler, Felix thought he'd better do the same.

In passing it slashed through the main steam line from the boiler.

This cold air takes heat from the boiler every time this happens.

This generated excess steam which had to be removed from the boiler.