what formula should you use to calculate how big a central heating radiator should be in a room.?

Question

I need to buy the radiators for my central heating and in a diy shop I saw this formula based on size of room, use of room, windows and doors etc but forgot to write it down and can't find it anywhere on the internet. Can you help please?

Answer 1

You probably saw this Heat Loss Calculator' I've posted it about three times now!

http://www.trademate.co.uk/Services/HeatLoss/default.asp?_brand=CP

Answer 2

Central Heating Radiator Size Calculator

Answer 3

This Site Might Help You.

RE:
what formula should you use to calculate how big a central heating radiator should be in a room.?
I need to buy the radiators for my central heating and in a diy shop I saw this formula based on size of room, use of room, windows and doors etc but forgot to write it down and can't find it anywhere on the internet. Can you help please?

Answer 4

On the thermostatic valve, which you describe above you have nos. 0 - 5 the 0 setting is the lowest setting you may even have a star / snowflake symbol which would be the frost setting, meaning that if the room tempreture fell below 5 celsius then the water would be allowed to pass and stop the radiator from freezing, the only way tro completely cut off the radiator would be to close the valves at both ends of the radiator, the one on the left called the lockshield has a plastic removable cover and below that a flat head which needs to be turned clockwise with a small spanner to close.

Answer 5

. A quick and easy way to calculate the size of the radiator required for any room in your house is by measuring the room in cubic feet and then applying the following factors to the figure arrived at:
Lounges and dining rooms Multiply cubic feet by 5
Bedrooms Multiply cubic feet by 4
Common areas and kitchens Multiply cubic feet by 3
For rooms facing north Add 15%
For French windows Add 20%
For double glazing Deduct 10%

This will give you the output of any radiator in BTUs (British Thermal Units). Adding the total for all the rooms in your house or flat will give you the demand in BTUs for the whole house. Add 20% to the total for a hot water circulating tank and 10% for general losses. This will give you the boiler size you need for your house.

Answer 6

if u go into ne good diy store they will have a guide of wot rad for wot size room or just go in to ur nearest plum center.