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Central Heating

Minimum requirements for a combi boiler (to have a great shower!)

Anonymous user 23/02/2024 - 2.50 PM

I previously had a very old cylinder system in my 1 bed flat in central London. Due to space restrictions I am now looking at installing a combi boiler but have received confliction opinions on this due to water pressure and flow rate concerns to the building. If I had a combi boiler installed where I am currently wanting it to be installed, then the shower is located approximately 15m (max) away from the boiler. My main requirement/want is to be able to have a nice long shower with decent pressure or flow (not sure which word is technically right here!!). If I have to make sure that someone isn’t in the kitchen using the hot water at the time then this is not a concern as it is only a 1 bed flat and there would be 2 people living in it max at any time. I also have a study with a small wet room for guests but once again not concerned as don’t expect people to be having a shower at the same time (or would be happy for this to be a restriction). I have had the water pressure and flow rate checked today reading 4+ bars and 25+ l/min (the + indicating that this was the minimum figures taken). Basically what I am trying to understand is if this is sufficient to have a great shower or will it be poor/average. A bit of a pet hate is having an “average” shower so I want to make sure that I make the right decision here as its fab to be able to come home after a long cold day out and have an awesome shower!! Any help or advice would be hugely appreciated.

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3 Answers

Full Flame

Rating: 5 out of 5

Dalston, London

I don't think that reading is Right Over 4 Bar 25 L/P/M ??? in a Flat All combis have flow limiters on them. Most flats in London have 10 to 14 L/P/M and about 1 to 2 Bars of Pressure So yours at 25 L/P/M if Correct would not be useable because the boiler would not be able to heat up the water quick enough.

Answered5 June 2014

Boiler Homecare

Rating: 5 out of 5

Honiton

A normal shower requires a minimum of 9/LPM. All modern combi boilers will deliver at least that flow rate, so no reasons to be concerned there based on the pressure/flow rate figures of your property you have provided.

Answered5 June 2014

Cochrane Property Maintenance

Rating: 5 out of 5

Chepstow

My advice would be stick to the Worcester brand name when it comes to combi boilers . They are at the top end of the price bracket but for the warranty you receive from them as a company is great and we have been fitting them into households for over ten years and they are still always the best . You can normally have a very decent shower and use other sinks at the same time if you go for a 27 classic model or upwards with regard to kW outputs.

Answered5 June 2014