Calculating the KWh to heat a room

more_control

Oh eye, true TRV's have been around for awhile.

The product I'm looking at in particular is the Moeller Eaton RF Radiator Thermostat


The only problem is our supplier does not have the information on hand to explain what kind of cost/benefit you get from the application.

This makes it a little bit hard to promote an item without knowing approximately the energy savings that can be made.

I'll give I measure a try to see if they have what I'm after.

Many thanks.

penrhyn

Found this on the itemp terrier.

http://www.saveonheatingbills.co.uk/

HappyMJ

more_control wrote: »

Oh eye, true TRV's have been around for awhile.

The product I'm looking at in particular is the Moeller Eaton RF Radiator Thermostat


The only problem is our supplier does not have the information on hand to explain what kind of cost/benefit you get from the application.

This makes it a little bit hard to promote an item without knowing approximately the energy savings that can be made.

I'll give I measure a try to see if they have what I'm after.

Many thanks.

That's a bit of pretty fancy kit. Imagine the cost would be quite high.

If you want to save money turn the thermostat down especially when going to bed and going out. It'll acheive the same outcome. i.e saving energy.

grahamc2003

pothole50 wrote: »

I have been onto a site which calculates the BTU's to heat up a room site is here.

http://www.homesupply.co.uk/radiator_output_calculator.php

I put in the calculations for the room 3.66m x 2.44m x 2.29m one window, one outside wall, heated room below and the fiqure came out as 471W and BTU 1609, I have put a 500kw heater in there and its no use at all, so are these just ball park figures.

You can't convert Btus to Watts. BTUs measure energy, and Watts measure power (shows how muchg the radiator com pany knows about heating!). Power is energy per unit time, so the power in old uk units is btu/hr

470W is about 1600btu/hr

Not that that helps you much. I expect the calculation is correct to maintain about 20C inside when its about 5C outside and theres only 1 outside wall - it assumes there's no loss from the other three walls, i.e. assumes the other rooms in your house are 20C too.

But that would be the power required to maintain that temperature, not to get there in the first place, which of course requires much more power. The higher the excess power over 470W, the quicker you'd get to 20C (at exactly 470W, you'd get there in an infitite amount of time, and I guess you don't want to wait that long). That's why heaters are around 2 or 3kW, to get the room up to temperature, and then cycle on and off to give an average of 470W in your case.... (all assuming the actual calculatioin is correct of course).