Combi boiler and good shower help

[Jojojojo55]

We are finally getting the en-suite bathroom replaced and possibly a new heating system. Currently have an electric shower and a gravity feed heating system.
Would like to replace heating with combi boiler but would this mean I can’t get a powerful shower.
Have been reading up on testing water pressure and tested in bathroom it was under a litre in 6 seconds.

Should I test it in kitchen or from outside tap or do combi boilers increase water pressure.
Someone with knowledge please help before I totally waste my money

I'm not knowledgeable but you need to check the water flow from your kitchen (mains) tap. In the bathroom it's probably gravity fed, which if you switch to a combi it will all be mains pressure, so you need to see what that is. Gas engineer should be able to advise you what is best for your house though.
Our last house had a combi and we had much better showers than currently with a gravity fed system, even with pumps. We're switching to a mains pressure system here soon (system boiler with unvented cyclinder I think?) , it's apparently a fair bit of work to swap over from gravity fed to mains but hoping it will be worth it.

It depends on the mains pressure. You might be able to fit a pump to increase the pressure.

AFAIK combi boilers work at mains pressure so you should get a good shower from it. But the person who can probably answer this best is @pigletjohn

Thanks for all replies, @Hannahcolobus, I’ve been told combi boiler will save money, instant hot water and we can get rid of cylinder tanks and gain a cupboard, also get rid of loft water tank. I could be wrong with all that. @Hannahcolobus what hrating system would you recommend?

Heating

Thanks so much, it’s a 4 bedroom detached house , main bathroom with bath and electric shower, moved bath and since then water runs really slow.

En-suite wit LG electric shower, want to replace with better non electric shower.

It’s a mineral noise built in about 2000. Don’t think boiler ever been replaced

Sounds like a large home to run off a combi. Do you have a downstairs loo as well?

We had one in our small 3 bed with a thermostatic valve and the shower was fab. We live in a larger house now so have an unvented cylinder and replaced the main water pipe to 22mm (I think). Get great showers on every floor and can run 2 at once.