Glasnevin Gas Services

Gas Boiler Types Explained

Choosing the right gas boiler depends on the size of your home, how many bathrooms you have and how much hot water you use day to day. Below is a straightforward guide to the three main types of domestic gas boilers fitted in Dublin homes.

Combi boilers

Best for: Apartments and 1-3 bedroom homes with one bathroom.

Pros
  • No hot water cylinder needed
  • Compact, wall-mounted
  • Hot water on demand
  • Generally cheaper to install
Cons
  • Flow rate drops if two taps run at once
  • Not ideal for homes with multiple bathrooms

System boilers

Best for: 3-4 bedroom homes with one or two bathrooms.

Pros
  • Good hot water flow to multiple outlets
  • Works well with solar and heat pump add-ons
  • No loft tank required
Cons
  • Needs an airing cupboard for the cylinder
  • Hot water is limited by cylinder size

Heat-only (conventional) boilers

Best for: Larger or older homes with existing tank-and-cylinder systems.

Pros
  • Suits homes with low mains water pressure
  • Can supply several bathrooms at once
  • Often a straight swap for older systems
Cons
  • Needs loft tank and hot water cylinder
  • Takes up more space
  • Slower to reheat once water runs out

Not sure which boiler is right for your home?

We size and quote boiler installations across Dublin based on your property, water usage and existing system. Get a free no-obligation quote before any work begins.

Request a quote

Need a gas boiler engineer in Dublin?

Call or message Glasnevin Gas Services for a quote.

Call now WhatsAppRequest a Quote