Gas vs Electric

IS Electric or gas hot water best?

There are so many options to consider when it comes to gas vs electric hot water, which is why we've put together a comparison of electric hot water cylinders vs gas hot water cylinders vs gas continuous flow hot water to help you decide which option might be right for you.

Hot water is something we all expect to have, but often take for granted. We don’t tend to give hot water systems much thought until it’s time for repairs or an upgrade. If you are considering upgrading or replacing your hot water cylinder, finding the right information can be difficult.

We also offer commercial hot water systems > 

Get in touch nowThere are several factors to consider when it comes to choosing a hot water system for your household.

  • How much water do you typically use?
  • How large is your household?
  • How many bathrooms do you have?

With so much technical information out there, it’s hard to know what is right for you. Topline’s team of licensed plumbers and gasfitters are trade specialists. We are available to talk you through your options, providing expert advice and practical solutions based on your individual requirements.

PROS AND CONS of electric hot water cylinders 


PROS of Electric Hot Water Cylinders

CONS of Electric Hot Water Cylinders

  • Suitable for all water pressures
  • No hot water during a power outage
  •  Some cylinders come with additional connections for solar power, saving electricity
  • Hot water is limited to the amount the cylinder itself can store and its recovery rate
  •  Suitable for a wide range of water conditions
  •  Some units can be bulky
  •  Take advantage of night-rate electricity tariffs depending on power plan


  • Some models can be installed indoors or outdoors

  • Newer models are triple insulated to minimise heat loss

pros and cons of GAS HOT WATER CYLINDERS


PROS of Gas Hot Water Cylinders

CONS of Gas Hot Water Cylinders

  • No electricity required, so there is a continuous supply of hot water during a power outage
  • They are more expensive to install upfront than an electric hot water cylinder
  •  Space saving (can be fitted outdoors)
  •  Limitations to where they can be located.
  •  Flow rates of up to 40L / m

  •  Ideal for high usage customers
  •  Suitable for all water pressures

pros and cons of GAS CONTINUOUS FLOW

PROS of Continuous Gas Flow

CONS of Continuous Gas Flow

  • Only uses gas on demand, so there is no cost when not in use
  • They can be more expensive to run if using LPG bottles
  • Heats water on demand instead of storing it, so it should never run out of water
  • As they heat water on demand, they could struggle to supply large quantities of hot water over a short period
  • Perfect for sporadic water use such as guest bathrooms and the bach
  • Some systems require an electrical supply, so no hot water would be available during a power outage
  • 2 units can be linked together for home with a high hot water use
  • Limitations to where they can be located
  • Compact size
  • Optional Temperature Controllers


Need help with your hot water cylinder or planning to convert from electric to gas hot water? Whether it's a gas hot water cylinder or gas continuous flow, get in touch! We’d be happy to help. Phone 0800 111 818 or enquire online >

Topline is proud to be a preferred installation and service agent for Rheem. Whatever your hot water cylinder needs, Rheem has a product to suit. Find out more about Rheem hot water systems here,

We are also able to install and service Apex, Caleffi, RMC, and Rinnai products.

See more on our Electric Hot Water Cylinder page >

See more on our Gas Hot Water Cylinder page >

Contact us if you're ready to upgrade! Phone 0800 111 818

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