https://youtu.be/ceRrs7k_n3Y
Another look at where not to use low loss headers (no we won’t let it go) and also that looks can be deceiving when it comes to heat loss. Keep it simple stupid. More on valve authority and opening characteristic here
Get a free, personalised estimate in seconds


Energy bills and the crisis explained: Heat Geek founder Adam speaks to BBC News on practical steps UK households can take to cut heating costs.
Read more
Common mixing valve faults that cause poor domestic hot water temperatures — how to diagnose them and avoid unnecessary parts replacement.
Read more
Heat Geek's Heating Mastery course covers hydraulic separation, pipework layouts, and maximising COP — everything needed for commercial and heat pump installs.
Read more
The April 2026 energy price cap falls 7% to £1,641/yr, but 39% of bills remain tied to volatile wholesale prices. Here is what it means for heat pump economics.
Read more
The Viessmann Vitodens 200 leads domestic gas boilers with an industry-best 1:19 modulation ratio, running longer and cooler to maximise efficiency and comfort.
Read more
Explains the distortion factor in hydraulically separated systems and how mismatched flow rates raise boiler temperatures and reduce condensing efficiency.
Read moreJoin thousands of homeowners and installers getting our latest updates, guides, and news on heat pumps.