Worcester Bosch 24cdi Hot Water Flow Rate

[abs1]

Hi,
I've just bought a place that had a shower in the bathroom, two showers in bedrooms and no bath. I've had a bath installed had the two bedroom showers removed. The hot water flow rate is abysmal whilst cold is perfectly fine. I've had a plumber (and I use the term loosely) out who flushed the system and serviced the boiler and he said it was most likely a partially closed valve in the bathroom or a kink in the pipework. The water flows from the combi in a bedroom then in to the bathroom but I know the one valve in there is open and no kinks. After that he was happy to get paid and leave with a shrug and and another "it must be in the bathroom" comment. I've since learned that with a 24cdi Wor_Bos that might be the best it can do! Can anyone shed more definitive light or suggest anything that improves flow rates without having to buy a new more 'powerful' boiler. Thanks in advance.

 

[Bartdude]

Worcester state the maximum flow rate from a 24i as 9.8litres per minute.Measure the flow at the taps,either with a flow cup(weir gauge)or timing how long it takes to fill 2 5litre buckets. If this works out to be about the same as Worcesters figures then there isn't much you can do I'm afraid. One of the major drawbacks with a combi is the low flow rates and the time it takes to fill a bath,if you've been used to a storage system then it will seem painfully slow!

You can get combis with higher flow rates and there are even a couple that have a small storage capacity but ultimately the design of a combi limits the flow it can supply.Having a hot water cylinder is the best way to cope with high demand. Combi boilers have their place and suit many applications but all too often they are installed as an easy option without the customers requirements being taken into account.

 

[abs1]

Thanks for the speedy reply. My flow rates (measured tonight using highly scientific method - 2 litre coke bottle) are as follows;
Bathroom (which is my main concern) Hot water is approx 4 litres/min with cold at 12 litres/min. The kitchen was 3 seconds quicker on both. There's a bar mixer shower fitted as well which doesn't even get the combi to kick in which again I'm hoping is related to the flow rate issue. Any further insight would be appreciated.

 

[tamz]

You need to first of all check the water is getting to the boiler, then through the boiler.
Check filters or if you are in a hard water area the plate heat exchanger.

 

[markproperjob]

worcester state the maximum flow rate from a 24i as 9.8litres per minute.measure the flow at the taps,either with a flow cup(weir gauge)or timing how long it takes to fill 2 5litre buckets. If this works out to be about the same as worcesters figures then there isn't much you can do i'm afraid. One of the major drawbacks with a combi is the low flow rates and the time it takes to fill a bath,if you've been used to a storage system then it will seem painfully slow!

You can get combis with higher flow rates and there are even a couple that have a small storage capacity but ultimately the design of a combi limits the flow it can supply.having a hot water cylinder is the best way to cope with high demand. Combi boilers have their place and suit many applications but all too often they are installed as an easy option without the customers requirements being taken into account.

aint that the truth!!!

 

[Bartdude]

It sounds like you have a flow problem somewhere. As tamz says,it needs to be checked. You should be able to achieve more than 4 litres a minute.