Goodbye Cylinders, Hello Smarter Heat.

 

Upgrade from inefficient cylinder systems to a modern Rendesco Cylinder-free solution.


Introducing Rendesco Flow: Your complete home energy solution



Find out how much you could save in 60 seconds 

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Why Choose Rendesco Flow?


Installed in Just One Day

Replace your existing boiler in a single day- no week-long disruption.

 

Lower Upfront Cost

No hot water cylinder needed.

Simpler installation.

Less disruption.

 

Direct Boiler Replacement

Designed to swap directly with gas and oil boilers - no major home changes required.

 

£7,500 Government Grant Available

Eligible for the Boiler Upgrade Scheme  - reduce installation costs by up to £7,500.

 

Lower Energy Bills

Smart controller + integrated battery charge off-peak. Use power when rates are highest.

 

Built for Long-Term Performance

Longer lifespan than conventional gas boilers. Better long-term value.


Get a quote and see your personalised savings in just 60 seconds




The Heating Interface Unit (HIU)
Flow App
RendescoCare

 

Our innovative HIU is installed directly in place of your old boiler and works with your heat pump to deliver instantaneous hot water, removing the need for a bulky cylinder and making the switch to low-carbon heating simple.

 

The Flow app gives you 24/7 visibility of your equipment, sends real-time notifications on system health, and shows how much you’re saving on your energy bills.

 

Rendesco Care keeps your system running at its best with 24/7 monitoring, expert support, and smart optimisation that, in conjunction with your batteries, shifts energy use to cheaper periods to keep bills down.


How it Works

 

 

     home-survey                                                          grant-application                                                           1-day-install

                             Home Survey & Plan                    System Design & Grant Application                          One Day Installation                         

                Check your property, heating,                              Custom plan created, and £7,500                                Old oil boiler removed → New Rendesco   

                    insulation, & electrics                                           grant  support (if eligible)                                                        Flow Heat Pump fitted.               

             smart-controls                                                             ongoing-support

Battery + Smart Controls                                      Ongoing Support

A battery system and intelligent controller                                8-year warranty + maintenance 

optimise your energy usage.                                                        for peace of mind.

 



Frequently Asked Questions (FAQs)


Is Rendesco Flow Suitable for my home?

Most properties currently using gas or oil boilers are suitable. A survey confirms compatibility and system sizing.


Do I need a hot-water cylinder?

No, the compact unit provides hot water without a cylinder


Will I need to replace my radiators?

In some cases, minor radiator upgrades may be recommended to maximise efficiency. Rendesco assess this during the survey.


What disruption should I expect?

Installation typically takes just one day, significantly reducing disruption compared to traditional cylinder-based systems.


How do batteries reduce my bills?

The system charges batteries during off-peak electricity rates and uses stored energy when prices rise - reducing your overall energy spend.


What happens if I don't qualify for the grant?

Rendesco will provide transparent pricing and finance options where available.


What warranty is included?

8-year extended warranty and maintenance package for long-term peace of mind.


Is it noisy?

Modern heat pumps are quiet; we position equipment to minimise sound.


What happens in very cold weather?

Rendesco Flow optimises performance for year-round comfort.


Who maintains it?

Rendesco do. RendescoCare provides 24/7 monitoring and rapid response – view our ongoing support options here