John Stumbles wrote:

I've just done a heatloss calculation for a small terraced house (3.8m wide
x 7.4m deep x 2.4m each storey with 2.5m x 4m back addition, mix of carpeted
wooden and solid floors, mostly single glazed, 50mm insulation in the roof)
and get just over 6.5kW, which seems very low. I've done the calcs on a
spreadsheet but cross-checked with the Myson calculator for the floor and
air changes of one room, to sanity check.

Does this seem right? I could put it all through the Myson to completely
cross-check it but it's a lot of extra work ...



It seems a tad on the high side to me.

I have 200 sq meters here (100 meters sq per floor) and that was
calculated at a shade over 9KW. But insulation is to specs.


you have 70 sq meters of floor roughly, so you are calculating 100W per
square meter more or less. That's about double what I need. Which seems
reasonable for solid or unisulated walls and floors. And single glazing.

Anyway, even a small boiler will do 10Kw in all probability, so just
bunf one in and let the thermostats take care of the rest.


tia

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John Stumbles
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