Category:Express boilers

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English: Watertube boilers with small diameter tubes (typically 2" or less) so as to have the greatest ratio of heating area to water volume. Other "large tube" boilers, such as the Stirling boiler, had tubes of 3" and over.

Subcategories

This category has the following 5 subcategories, out of 5 total.

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Media in category "Express boilers"

The following 5 files are in this category, out of 5 total.