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Explanation: Swedish kamfläns = English fin and
Swedish slinga = English coil or loop in Engstroem Teknisk ordbok
A finned-coil heat exchanger has a housing with spaced walls defining an internal chamber with air flowing from an upstream end to a downstream end, spaced transfer tubes with heat conducting media flowing therein from the downstream chamber end to, etc.
A fluid heater as claimed in claim 5 further comprising a flow restriction to restrict flow to the finned coil.