Let’s say someone is using the shower, and then someone turns the hot tap on in the kitchen, normally the shower will go cold.
The reason being is most combination boilers can only produce around 10-12 litres of hot water per minute.
Some now can produce up to 20 litres per minute, but they are very expensive.
Another thing I find is some people get confused between condensing and combination boilers.
All boilers now installed in the UK are high-efficiency condensing boilers.
So back to the question what boiler do I choose?
Every home is different, you need to calculate the amount of heat required per property,
plus the amount of heat needed to heat the hot water, this will then tell you what boiler size you will need.
If you have two bathrooms within your home then its best to install a heat only boiler,
either pressurised or open vented, along with a hot water tank or cylinder as its known.
The tank again can be pressurised or open vented.
The best option is pressurised for both boiler and hot water tank,
you will save on your energy bills going pressurised.
Now if you decide to go for pressurised, you have to consider the age of your old heating system,
if its open vented, if it’s pressurised then it’s ok. With an open vented system it has only been tested on low pressure, as soon as you convert to high pressure, leaks may happen, not all of the time, but it could happen. Rule of thumb is if the system is over 15 years then you should stay open vented, or have a complete re-pipe, which then gets a bit costly.
The best advise I can give is, don’t go down to your local plumbing shop and ask them what would be the best boiler for your home, they will see you as someone who has no knowledge and will try to sell you the most expensive boiler along with parts you may not need. The best thing you can do is call in your local Gas SafeBoiler engineer and follow his suggestions. He has been highly trained and should be able to match you with the best boiler for your home.
To find your local Gas Safe Engineer, go to the Gas Safe Register and follow the instructions on the website. You will be given the names and numbers of three local engineers.
So what boiler do you choose? Check with someone who knows what’s best for you.
Should wish to talk with someone re what boiler to choose, just enter your details in the box below.