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Power, electric or mixer, which shower works best with a combi boiler?

Many homeowners struggle with figuring out what kind of shower suits their combi boiler heating system best. The right choice could provide you with an effective quality of hot-water from your shower, whilst the wrong one could lead to your unit becoming over pressurised.

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Price Guarantee[28]

Simply answer a few multiple choice questions about your existing boiler and we’ll give you a fixed price for a new boiler including all parts and installation[28]

There are 3 main types of showers, all detailed in the table below:

Shower type Description Potential benefits
Electric These shower systems are designed to provide instantaneous hot-water, retrieving cold water from the mains and transporting it over the system’s internal heating unit.
  • Water is only heated as needed, helping reduce energy wastage and energy bills[2].
  • On-demand hot-water.
Mixer Shower (Thermostatic & Manual) This type of shower connects to both the cold and hot water supplies in your home to deliver water at the temperature you want through the attached head. These showers could either be controlled by a shower valve or by adjusting your bath taps.
  • Usually have an effective flow of water
  • Typically modern in design—no need for a shower box.
  • Generally easy to control
Power Shower Like mixer showers, power showers feed off of both cold and hot-water supplies and operate with a built-in pump. These showers are typically well-suited to homes in low-pressure areas as the integral pump is built to force water through the system at a high pressure.
  • Designed to provide powerful and plentiful hot-water to homes regardless of whether they have low pressure
  • Often have both thermostatic and manual options

Which showers are compatible with combi boilers?

Electric showers and mixer showers are typically the only shower types that can be used with combi boilers as unlike power showers, they do not feature an internal pump. This built-in pump prevents power showers from being compatible with combi boilers as this additional force could cause excessive pressure, which can in some cases be dangerous.

It’s always best to consult a professional when deciding on the best shower system for your home, as different homes can sometimes have different restrictions and requirements. Our knowledgeable experts could provide you with the help and advice you need to make a suitable choice for your home, whether you need help choosing a boiler or a shower system. Get in touch today.

The content on this page has been provided to you for information purposes only and is not intended as advice and should not be relied upon. Always seek advice from a suitably qualified professional.

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[2] Source: Saving calculated when replacing G rated with A rated boiler in a semi-detached house.

[28] Exclusions apply. See