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i did my biomass hetas course at a place in Derby called Surefire. It was very good and easy going, plenty of time to mess about with the boilers. Ive heard alot of places just rush through the course.
Reply to the thread, titled "Hetas Training course prices and locations?" which is posted in Plumbing Courses on Plumbers Forums.
We recommend City Plumbing Supplies, BES, and Plumbing Superstore for all plumbing supplies.