Net Zero Heating Show
The Net Zero Heating Show is the podcast from Grant UK that explores all things renewables and sustainable in domestic home heating. Members of the Grant Team have been joined by expert guests from the heat pump and renewables sector to discuss the topics that really matter to heating installers and engineers.
Net Zero Heating Show
Episode 18: Comfort Cooling – can heat pumps cool you down?
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Following the record-breaking temperatures experienced in Summer 2026, conversations about heat pumps are turning to how this low-carbon technology can be used to cool homes down. This episode of the Net Zero Heating Show explores comfort cooling with air-to-water heat pumps and how it can be used to reduce room temperatures.
Join Neil Sawers (Grant UK’s Commercial Technical Manager), Glyn Hudson (Co-Founder of OpenEnergyMonitor) and Ricky Prescott (Director of Thoroughflush Ltd) who talk about what comfort cooling is, its pros and cons, and Glyn and Ricky’s experiences with comfort cooling in their homes using the Grant Aerona 290 heat pump.
What’s discussed:
- What is the comfort cooling mode on heat pumps and how does it differ to air conditioning
- Understanding the dew point and how to prevent issues caused by condensation
- Glyn and Ricky’s experiences of comfort cooling having enabled this mode with the Aerona 290 heat pumps installed at their homes
- The place for comfort cooling in the retrofit market.
Useful resources:
To read more about Grant UK’s products, services and training, please visit: www.grantuk.com/professional. For further information about the Aerona 290 air-to-water heat pump range, please head to www.grantuk.com/professional/products/air-source-heat-pumps/r290. You can also learn more about the Aerona Smart Controller here: www.grantuk.com/professional/products/air-source-heat-pumps/aerona-controls.
To view the monitoring data of Glyn’s Aerona 290 heat pump, please visit: https://heatpumpmonitor.org/system/view?id=748. To access the monitoring data of the heat pump system discussed in this episode installed in London, please visit: https://heatpumpmonitor.org/system/view?id=876.
More about the guests…
Glyn Hudson is a Co-Founder of OpenEnergyMonitor, the open-source energy monitoring project he started with Trystan Lea in 2009/2010. What began as hand-soldered through-hole circuit board kits for enthusiasts has grown into an internationally used ecosystem of open hardware and software for understanding how homes and buildings use energy and how to get the most out of key decarbonisation technologies such as solar, batteries, heat pumps and
EVs.
In recent years Glyn's work has focused on heat pumps. His particular contribution to the HeatpumpMonitor project has been turning the emonHP into a pre-configured, straightforward product to install, and liaising directly with installers and end customers to make sure installations go smoothly: the practical groundwork that allows performance data from real UK systems to be collected consistently and compared. Glyn has designed and installed a number of heat pump systems, including the one in his own home, and uses that practical experience to help others learn how to design and install efficient installations through his YouTube channel.
Ricky Prescott is the Director of Thoroughflush Ltd. A heating engineer with years of experience installing and working with central heating systems, Ricky now specialises in water quality for heating systems, working closely with installers and engineers and providing simple, effective central heating flushing solutions.
This episode was recorded on 25th August 2026. You can also watch this episode of the Net Zero Heating Show on Grant UK’s YouTube channel – please visit www.youtube.com/MyGrantUK.