Notice: The Heritage Group has been collecting
information and pictures from a
wide variety of sources for over 30 years, much of which is in the
domain, or over 100 years old where the copyright has either expired or
possible holders are unknown. If anyone has a claim in this regard
contact the Webmaster who would be pleased to include a suitable
withdraw the item.
original material on this website 2001-2013
the copyright © of the Heritage Group of the CIBSE. Text and
images may be used
in print or on another website, but permission must first be obtained,
the url source given and an acceptable acknowledgement displayed.