Boilers

Combi or system boiler — which suits an Irish home?

A combi boiler suits most homes with one or two bathrooms: hot water on demand and no cylinder. A system boiler with a hot-water cylinder suits larger homes where several taps or showers run at once.

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RGII
Registered & Insured
IS 813
Gas Safety Certified
4.9★
158 Google Reviews
Family-run
Based in Naas
12-mo
Workmanship Warranty
€6.5M
Public Liability Cover

At a glance

CombiSystem
Hot waterOn demandStored in a cylinder
Best for1–2 bathrooms2+ bathrooms, high demand
Space neededBoiler onlyBoiler + cylinder
Showers at onceUsually oneSeveral

How we decide

At the free home survey we look at the number of bathrooms, how many people live in the house, water pressure and where the boiler can go. Then we recommend one option and explain why.

Related questions

Can I switch from a system to a combi?+

Often, yes — it frees up the hot-press space. We check your water flow first.

Which brands do you fit?+

Mainly Worcester Bosch and Ideal.

Is one cheaper to run?+

Both are efficient when sized correctly; the right choice depends on how your household uses hot water.

Need a plumber today?

Honest pricing, RGII certified, same-week appointments across Kildare.