RADPUMP circular pocket calculator for small bore heating systems
A neat calculator for determining size of radiators needed to meet BTU loading
Used for 1/2' and 3/4" copper tubing circuits.
Instructions for use on rear of device.
Made by Smiths Calculators Ltd., Beaminster - for Sealed Motor Construction Co. Ltd, Bridgewater, Somerset, UK
Please refer to photos for specific details.
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