Spray Booth caution
A spray booth in Minnesota and other northern climates can present a problem if placed in the basement of a tightly insulated house. I had a metal fabricated booth with a high volume fan which I used in business machine repair. Our furnace and gas hot water heater was in the next room in the basement with an average interior door, 2x4 walls covered with sheetrock separating the shop. When the booth blower was running AND the furnace or water heater kicked in the exhaust (smoke) from the furnace/water heater would get sucked DOWN the chimney. Houses in most northern climates now have a requirement to supply outside air to the furnace via a large duct through the wall which would probably solve the problem but that was not the case in houses built in the 1970's or older. To get this thing to work required turning the furnace off, the water heater thermostat down, seal the workshop door with a rug at the bottom, open a shop window or crack the outside shop door (I had a dedicated outside entrance) to provide outside air before using the booth. It would draw the temperature in the entire house down somewhat.
My booth may have been overkill on my part but I had NO fumes, nor chemical, or paint smells in the house at all. It was a permanent appliance & had more CFM's than a bath fan or box fan could produce. Keep this in mind when building your spray booth as it could be deadly if the wrong combination of equipment is present. I wish I had the spray booth in my shop today as it worked very well but it went with the business.
Dick DeCramer
Northfield, MN
RV6 N500DD flying
RV8 fuselage