And there are a lot of other factors to consider not just the size of the rooms. Insulation is critical as the object is to trap as much warm air and not let it dissipate through single glass windows or un-insulated attics.
A perfectly hermetically sealed room is never absolutely obtainable. And perhaps it shouldn’t be. Some fresh air must circulate for healthy lungs.
It’s the same problem with air conditioning in hot climates. Most properties in the UK have no need for air conditioning as it rarely gets hot enough to warrant any.
But so often people from the UK spend their hard earned two week holiday in hot countries where air conditioning is the norm. They breathe in the chilled air at night in their bedrooms and then walk out into the hot sunny air the next morning.
And guess what? Many of these holidaymakers suffer colds and other respiratory problems.
Just as the problem of cold rooms and hot outside causes these problems, so does the reverse of an overheated central heating system and a cold outdoors.
But back to the BTU calculator. This should normally be reckoned by a central heating firm. Preferably of course, the one that is going to fit your new system.
The size of the room is calculated and then added to that are details about window area, wall material and what’s above and below each floor.
It’s easy enough to find a calculator online and to do this yourself. A good site will then direct you to the correct size radiator whether that’s a wet system or electric.
The optimum size radiator means greater efficiency that ultimately means saving something on utility bills.
Thermostats on radiators or wall mounted, or even both, will switch on and off as heat is required. But don’t forget, that setting just one temperature below your normal comfort zone can have a noticeable impact on bills.