"My colleagues and I are so pleased we found you as a source of industrial filters for the warm air heating system installed in our St. Mary's Church, Amport Hampshire (SP11 8BW).
The modern electrically driven warm air system drives heating air through the 160 year old brick-lined tunnels unused since 1945. However, because of the age of these tunnels, or should we call them ducts, we were aware that highly efficient filtering was needed to ensure the heating machinery was protected from long-standing dust remaining in the 30 metre return air tunnel.
My thanks to Lee Ford and yourself for producing a specially designed set of filter panels to match our needs. We purchased two sets and one of these is now working well. We will find out in due course when the second set will need to be fitted."