I have a brick built workshop, brick outside 50mm cavity and old fashioned breeze blocks inside, a pitched roof with clay pantiled roof the ceiling is covered in 100mm industrial insulation, floor area is some 35 square meters. Heating is via two 3Kw storage heaters, one is probably 40 years old I bought for a fiver the other was bought new 32 years ago. They are on timers (hard wired type) which is set to come on at 1.00am and off at 7.00am, most of the winter months I only have one on, but since the Beast from the East hit I have had both on. I used to run them on Economy 7 so I paid a cheaper night rate, but about 3 years ago Eastern Electricity advised that it would infact work out cheaper to have just the normal day rate. My workshop is nice and warm for a 9.00am start and the heat is still sufficient at 5.00pm. Works well for me, no rust issues and no naked flames after in excess of 30 years use they are unaffected by dust. The dust extractor is housed in a separate room within the main work shop, mainly to keep the noise down, the extractor is fitted with a 0.5 micron filter and the filtered air comes back in to the workshop via the small gap round the door.
