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Combi boiler vs tank
If I swap my old tank setup for a combi, will I lose any hot water when everyone’s in? I hate the idea of showers going cold, but I don’t know if a combi without a tank will struggle when everyone is getting ready in the morning
Expert Trade Answers
"Yes. Combi will let you down on hot water if you use 2 showers at once. Other solutions is have one electric. Invented cylinder sized up correctly will be best solution"
Answered on 1st Feb 2026 - Member since Feb 2023 -
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"Pressurised cylinder is a better setup. Although if you have a good water pressure and flow rate a big enough combination boiler would suffice."
Answered on 1st Feb 2026 - Member since Oct 2025 -
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"A combi will constantly give you hot water
If you have a couple of showers on the go at the same time it can sometimes cause issues
But if it’s just one shower at a time you could stand under it all day 👌"
If you have a couple of showers on the go at the same time it can sometimes cause issues
But if it’s just one shower at a time you could stand under it all day 👌"
Answered on 1st Feb 2026 - Member since Jan 2024 -
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