• May 25, 2020

Boiler Sizing Guide: What Size Boiler Do I Need?

Boiler Sizing Guide: What Size Boiler Do I Need?

Boiler Sizing Guide: What Size Boiler Do I Need? 150 150

Boiler Sizing Guide: What Size Boiler Do I Need?

Boiler Sizing Guide: What Size Boiler Do I Need? Compare Boiler Quotes

Compare Boiler Quotes is becoming well known as an authority on boilers and boiler questions. That’s what we’re here for. To help you in the search for your next new boiler

There are many questions you may have, but finding the right size boiler for your home can be a challenge. You need to know what the capability is and if it can cope with your specific home. 

In other words, is this particular boiler powerful enough to heat my home and provide hot water? Or do I need to get a higher KwH? We are going to answer these questions for you today. Welcome to CBQ’s Boiler Sizing Guide.

 

So What Size Boiler Do I Need?

Boiler Sizing Guide: What Size Boiler Do I Need? Compare Boiler Quotes

It’s not easy to recommend a boiler specifically for your home due to many factors and variables inherent in the home. This is why we do advise to use our boiler quote calculator to get a personally recommended boiler specifically tailored to your home. 

 

The size of the boiler you may need  is commonly referred toas the output. This is measured in kWh (kilowatt hours) . What’s important to take note of is that this refers to the number of kW, so the higher the number the more powerful the boiler will be. 

 

In many cases, domestic boilers come in ranges between 18kwH-42kwH. 

 

It is important to learn about the boiler sizings and what is recommended for each home. We will provide a list of boilers which we would suggest for each home sizing by bedrooms. So, if you were to have a 1-3 bedroom home, many of the smaller boilers would therefore be suitable for your home.  

 

The best advice that we at Compare Boiler Quotes could give is that you need to purchase a boiler that is capable for your home specifically. Again, it seems pretty obvious but many of us don’t take much notice of our boiler systems while they’re working. It’s only after they break down that we start to take note.

 You don’t  want a boiler which is too small as it will not be able to heat your home adequately or produce enough hot water for you and your family.

Whereas, a boiler that is too powerful for your home, will unnecessarily use too much energy to provide heat and hot water and can produce harmful emissions. This is why it is so important to choose the right sized boiler. 

It’s almost like goldilocks and the three bears. You need to find the ‘porridge’ (boiler) that is just right!

 

Determining the required boiler Size for your home

Boiler Sizing Guide: What Size Boiler Do I Need? Compare Boiler Quotes

As mentioned, we like to (as do others) provide recommended boiler sizing guides based on bedroom size. This gives us an idea of the amount of rooms and or radiators which the home may have. 

When we see the questions people ask, it’s usually ‘what size boiler do i need for a 4 bed detached house’ or something along those lines. 

 

Professional installers will use this metric however they will also count the number of radiators, number of people likely to use a bathroom simultaneously, and other questions to help decide what’s right for you. 

 

What else do I need to consider?

Boiler Sizing Guide: What Size Boiler Do I Need? Compare Boiler Quotes

Look for the Flow Rates.

 

Combi Boilers and System boils take water directly from the mains.

Whereas regular boilers feed from a hot water cylinder. Therefore, combi and system boilers need to have their water flow rate calculated in order to get the right system output for a new boiler.

 

What does this mean?

This means that you will have to measure your water flow rate. You can do this with a measuring bucket or a large container with mm metrics on it.

You will have to run the water for a minute and then see how much the receptacle has filled.

Now, you can calculate flow rate .

 

How do I do this?

It is not very complicated, and there are several tools available online to help you with this. We recommend using an online calculator such as this: https://www.copely.com/tools/flow-rate-calculator/

If you have a professional installer doing the fitting for you however, you will not need to do this as they will be able to calculate exactly what you need.

 

What Boiler Would You Recommend for A 3 Bedroom Home?

 

Here’s what we would recommend for the average size 2-3 bedroom home. This is as of April/May 2020. These are subject to change. If you want a personal quote for your home, click here.

 

Manufacturer Size Type Efficiency Warranty Typical Price
Viessmann Vitodens 050-W 26kW Combi Gas Boiler 26kW Combi 97.95% 5 years £800
Baxi EcoBlue+ Combi 28 Gas Boiler 28kW Combi 89.5% 5 years £750
Worcester Bosch Greenstar 27i System Gas Boiler 27kW System 92% 5 years £1000

 

What Boiler Would You Recommend for A 4 Bedroom Home?

 

For homes with 4 bedrooms it is usually advised that you have a system or regular boiler installed in order to cope with the amount of hot water and heating required.

There are some modern combi boilers which are capable and we’ll list our recommended systems here.

 

Manufacturer Size Type Efficiency Warranty Typical Price
Viessmann Vitodens 200-W 35kW Combi 97% 10 years £1300
Baxi EcoBlue Combi 40 Gas Boiler 40kW Combi 89.1% 10 years £1300
ATAG IS40 40kW System Gas Boiler 40kW System 89.8% 10 years £1100

We can’t exactly say what’s the best and we’ve mentioned several times that it’s best to use a boiler quote calculator from a reputable company. These systems calculate the best boiler for your home based on 9 simple questions.

Once you fill this out, you’ll get 3 options for your home. A budget system, medium range, and high end system depending on your budget.

After choosing your boiler, you can either leave the site with no obligation at all, or book a convenient installation date, get flexible online financing, and sit back and wait for your new boiler to be installed! It’s really that simple.

Thanks again for reading our articles and we hope they have provided some useful information for you.

Boiler Sizing Guide: What Size Boiler Do I Need? Compare Boiler Quotes

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