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  1. brightonbill

    Heat loss through ground floor

    I am struggling with calculating the heat loss through the ground floor of an internal room. Walls, roofs, windows etc. no problem as I have a design external temperature (I use -8C) and known u values and the infiltration rate. For the floor of an internal room I can calculate the PA ratio of...
  2. brightonbill

    Loading Units Domestic Hot and Cold Water Supplies

    I've been struggling with the application of Loading Units on hot and cold water supplies and BS EN 806. In theory this is a simple method of adding up the units to conclude what supply is required. But what I don't know is whether the loading units allow for both hot and cold water i.e. do you...
  3. brightonbill

    Heat transfer in water heater

    I have an interesting problem that I am struggling to solve. I am working on a residential project in which the client would like to install a 100L water storage heater to provide hot water to a shower. The hot water heater has 2No. 6kW elements and the water flow required is 0.15 L/s to the...

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