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
MoreWhy 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)
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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 & 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.
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)
Most properties currently using gas or oil boilers are suitable. A survey confirms compatibility and system sizing.
No, the compact unit provides hot water without a cylinder
In some cases, minor radiator upgrades may be recommended to maximise efficiency. Rendesco assess this during the survey.
Installation typically takes just one day, significantly reducing disruption compared to traditional cylinder-based systems.
The system charges batteries during off-peak electricity rates and uses stored energy when prices rise - reducing your overall energy spend.
Rendesco will provide transparent pricing and finance options where available.
8-year extended warranty and maintenance package for long-term peace of mind.
Modern heat pumps are quiet; we position equipment to minimise sound.
Rendesco Flow optimises performance for year-round comfort.
Rendesco do. RendescoCare provides 24/7 monitoring and rapid response – view our ongoing support options here
