Installing Combi boiler in D12

thewiseowl12

Hi, hoping people may have some experience of the following and can comment.

Thinking of (hoping to!) install a combi-boiler in a house in the Crumlin area, near the Canal. Water demands are the kitchen sink, two toilets, two wash hand basins and one shower. The shower is upstairs.

My only concern is that the water pressure coming into the house seems average at best (I have to get it assessed) and so the shower might up being very weak.

Has anyone any experience of installing combi's in the Crumlin area for an upstairs shower and how they fared out?

On a side note, I've discovered that the neighbour and myself are potentially sharing a mains connection - it this possible? The council turned off my supply at the stopcock at my gate and their house had no water. There is no stopcock outside their house, it appears concreted over for car access. I'm not sure how big an impact this potentially has on water pressure, if any.

Thanks

K.Flyer

Yes, to the shared mains connection, aa I was working on one in the same area this week and it shut the neighbours off as well.
Poor water pressure is not unusual, but for those two reasons it is not suitable to directly feed a combi boiler.
You will need to utilse to attic tank, which might need changing, and fit a pump to increase the pressure sufficiently to accommodate the combi installation.

roy rodgers

We are doing a lot of heating upgrades in the area at the moment and we struggle to get 1 bar onto the heating system.
If your going for a combi boiler you be better off keeping the storage tank in the attic and maybe put a submersible pump into the tank.
That way you won't have the noise of a pump running through out the house.
A submersible pump is the same price as any good pump and works a treat.

thewiseowl12

Thanks for all the feedback everyone.

One further question if you don't mind - would a potential solution be to have a buffer tank (say 300L) in the attic which connects to the combi for providing hot water instead of connecting the combi to the mains? The tank would fill more slowly than it was being replenished by the mains but 300L should hopefully be enough of a buffer for a 4 person house?

Would one alternative be to connect the combi to the existing cold water attic tank? Say by using a bigger tank?

Thanks

roy rodgers

Yeah I'd personally use the tank in the attic and depends on the size of it but adding a second tank to existing one would be easy enough done and and that will give you all the water in the world. Just make sure to use a good pump and not a cheap plastic shower pump..

roy rodgers

Also you able to get a seai grant off 700 euro without doing to much extra work and if your an electric ireland customer they will give you a credit off 420 euro.

stiofan85

I just did this in Crumlin. Combi with just shy of 1 bar of pressure coming from the mains. Added a huge tank in the attic (the galvanised steel ones up there were manky) and then a pump for a really nice hot shower without any reliance on ensuring the immersion has come on or the risk of running out of hot water. Same for the kitchen with instant pumped hot water (takes maybe 30-45 seconds for the cold water to run through and boiler to heat up). Cold water is still on the mains though and although the cold water pressure seems fine, switching to the pumped hot water it seems quite poor by comparison.

House is small enough so delighted with the space savings of not having a hot water tank. We moved the boiler under the stairs for more space in the bedroom also and so it is out of sight and out of mind.

Really happy so far

Dtp1979

If combis are installed in the right situations I.e fantastic water pressure, no limescale in the water, one bathroom etc then they really are a perfect fit

Harrycasual

MOD NOTE: Just deleting this as you have also asked this question on another thread. Deleting this isn't a big deal, as its only your 4th post. Just for your future reference, double posting is not normally allowed. Good luck with an answer.