size

Brad White

But Dave and Tim 'got your back'.

Where the house is located (geographically) is a huge determinant. Areas of roof, exterior wall, glass, floor over unheated space, any surface that separates heated from unheated space or the great outdoors and how well they are insulated are the key factors.

Add to that how "leaky" the space is (infiltration) is the other major component to a heat loss.

The temperature you desire to maintain indoors is the other, versus the design cold outside temperature (that geography thing again).

Then you ask yourself "baseboard heat? Standing cast iron? Radiant floor?..." to get you to an answer.

Start with the Heat Loss Calcs feature under the "Resources" tab above.

It is really not that difficult and the exercise can yield an understanding of the factors which affect energy efficiency in other parts of your house too! The more awareness, the better we all are.

Brad

debbie_4

size

how big of a radiator do you need to heat an 8 x 20 room. on window 4 x 4, two open doorways leading to other rooms, tile floor

Unknown

debbie

Many more things to consider in sizing a rad than that. Have you tried the heat-loss program available under the resources tab above?

Dave

Timco

Agreed. No way to 'guesstimate' needed btu's or needed EDR without a detailed heatloss calculation of the room. The download for the program is free under 'heatloss calculations' at the top. Figure out your heatloss btu's and then ask the same question. Also...hot water or steam?

Tim