Working out your output requirements for a new boiler can be tricky. When it comes to working out what kind of output you need from a normal stove it is relatively simple in comparison. This is because you only need a normal stove to warm the room in which the stove resides.
(In case you’re wondering, the stove output formula for this is (in metres) (Length x Width x Height)÷14. You’re welcome to use our output calculator tool.)
However many people are looking to use their stove to heat their whole home, which is where a boiler stove comes in to play. The problem is, to the average person on the street, knowing what output you need without a simple formula like the one above can seem quite daunting.
To begin with you need to realistically look at your household’s heating needs. When it comes to talking about central heating systems and heating water we use British Thermal Units (BTUs). To convert BTUs into Kilowatts (kW), which is how we measure the output of a stove, we know that 3,400 BTUs are approximately equal to 1kW.
The average person requires 3kW per day. That is about 10,000 BTUs for domestic hot water. So the first thing you need to do is add up how many people are in your home and the total BTUs.
Next you need to work out the BTU requirement of your home’s radiators. The average 1.2m (4ft) radiator needs 1.5kW, which is 5,000 BTUs. Times this by the number of radiators in your home.
Add together the total BTU of everyone in the home and total BTU of all the radiators in the house and that gives you the figure you need to look out for when buying a boiler for your stove. This figure indicates how many BTUs you will need to run everything – heating, hot water, etc. This figure can be lowered if it is supplemented with the likes of solar panels or a gas boiler.
For ease all of our boiler products are listed with kW to room, kW to water, BTU to water, and number of average radiators that can run on the appliance.
There are many different ways to install a boiler stove and many different factors to consider. It is always best to consult a HETAS qualified engineer when considering an undertaking of this size. They will be able to advise on direct circuit heating vs storage systems, hot water tanks vs thermal heat stoves, and the differences between gravity and pump fed systems.
A boiler stove is a considered purchase but there are a lot more options today than there have ever been before. Whatever your heating situation and requirements, there is a solution for you.
Got a question? Leave it in the comments below or get in touch!