Why Packaged Boilers Are Highly Needed
As early as in 1950s, the further development of the three pass economic boilers was requested. And mostly the boilers were designed as packaged boilers using gas and oil rather than coal fuels.
The packaged boiler is so called because it comes as a complete package with burner, level controls, feedpump and all necessary boiler fittings and mountings. Once delivered to site it requires only the steam, water, and blowdown pipework, fuel supply and electrical connections to be made for it to become operational.
Development has also had a significant effect on the physical size of boilers for a given output:
Manufacturers wanted to make the boilers as small as possible to save on materials and hence keep their product competitive.
Efficiency is aided by making the boiler as small as it is practical; the smaller the boiler and the less its surface area, the less heat is lost to the environment.
To some extent the universal awareness of the need for insulation, and the high performance of modern insulating materials, reduces this issue.
Consumers wanted the boilers to be as small as possible to minimise the amount of floor space needed by the boiler house, and hence increase the space available for other purposes.
