Are buffer tanks the hidden enemy of heat pump efficiency? In this episode of Homeowners’ Q&A, we take a deep dive into one of the most contentious topics in the heat pump industry: buffer tanks, volumisers and hydraulic separation, and do they have a place in heat pump installations.
Installers who favour buffer tanks argue they reduce cycling, assist with defrosting and add much-needed system volume. But is that the full story? Critics argue that buffer tanks introduce inefficiencies, lead to blending issues (distortion) and drive up running costs due to additional circulation pumps.
We’ve assembled a panel of industry experts to dissect this issue: Leah Robson (Your Energy Your Way), Mario Dodić (Heat Pump Consultant, Trainer & Engineer), Brendon Uys (British Gas Net Zero) and Neil Sawers (Grant). Together, we challenge long-standing assumptions and take a hard look at the real-world performance of buffer tanks:
- Are buffer tanks really necessary for heat pump systems?
- How do volumisers compare, and when should they be used instead?
- Do buffer tanks solve problems or just mask poor system design?
- How does hydraulic separation impact efficiency?
- Can you optimise a system without a buffer?
Watch the full episode below to hear expert insights and practical advice for homeowners and installers alike.
And a big thank you to Reencle for sponsoring this episode. Find out more about their home composter here.
