Philippa01

Hi all, I’m currently assessing options for a low-energy / airtight self-build and am looking at integrated systems such as the PKOM4 (MVHR with integrated heat pump for space heating/cooling and DHW). There’s plenty of manufacturer and installer material available, but I’m finding very little UK-based post-occupancy feedback from owners, so I’m hoping someone here has direct experience. If anyone on BuildHub has a PKOM4 installed in a UK home, I’d be very interested in hearing how it performs in practice, particularly: Space heating performance How well does it maintain internal temperatures in a typical UK winter? Any reliance on backup heating? Cooling / summer comfort Does the system provide meaningful cooling, or is it closer to comfort tempering via supply air? DHW performance Capacity and recovery times in day-to-day use? Running costs Annual electricity consumption and seasonal performance? Noise and usability Internal noise levels (fans/compressor) and control interface? Reliability and servicing Faults, maintenance requirements, UK support and spares availability? With hindsight Would you specify it again, or opt for a more modular approach (separate MVHR + ASHP + cylinder)? My main question is whether the integration and space saving genuinely justify the cost and complexity versus a conventional split system in the UK context. Happy to hear from owners, designers, or installers with real-world experience. Thanks in advance.