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Our newest publication is now updated to 2005 putting it into our normal five-year cycle for updating all our products. We hope to yet find the data that will allow us to extend our listings backwards in this publication. Hopefully by twenty or thirty years.

As you probably know, there are not a lot of technological advancements in boiler design and/or operation.
And, boilers can last a very long time. Therefore, manufacturers tend to continue making the same model(s)
for a much longer period of time than they would, for example, a furnace.

The supplement pricing includes all shipping and handling charges.

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