- Messages
- 40
Sorry I’ve mis typed something there it’s four external walls with three as I stated and the other is one single skin stone wall (don’t ask me why!)Worked it out approximately 2 outside walls etc
Discuss BTU calc help in the Central Heating Forum area at PlumbersForums.net
Sorry I’ve mis typed something there it’s four external walls with three as I stated and the other is one single skin stone wall (don’t ask me why!)Worked it out approximately 2 outside walls etc
Any workings?, pretty please7.4kw
Thank you.Its quite a time consuming and complicated task really and you need to know some data first if you're going to do by hand, although there are websites/software out there that do it for you but they also require the same data, however I would prefer to do by hand. There's two ways a room/building loses heat. 1. Ventilation heat loss and 2. Fabric heat loss. When calculating the ventilation heat loss you need to the total volume of the room, the air changes per hour for that type of room, the design outside temperature and room target temperature. Example.
3m x 4m x 2.4m = 28.8m3, now x that by air change rate, then x that by the design temperature difference and then x that by 0.33 to get your total ventilation heat loss in watts.
Fabric heat loss is a bit more complicated.
The calculation is. Surface area x temperature difference x U value = rate of heat loss in watts.
You would need to know the U value for all materials in the walls and that of windows doors etc.
Any workings?, pretty please
don’t work it out long hand I use a program
Which one?don’t work it out long hand I use a program
Reply to BTU calc help in the Central Heating Forum area at PlumbersForums.net
We get it, advertisements are annoying!
Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.