Brian K

The WHO limits are based on yearly average values which are basically pointless in many Western European countries. The background air quality is generally reasonable but many locations suffer from nightly spikes in PM2.5 due to the burning of solid fuels (mainly coal and wood). Therefore the authorities can point to broad compliance with the yearly limits but people are exposed to extremely high PM2.5 concentrations especially during times of cold, still weather where the emissions are not dispersed by the wind. I have my sensor set to turn off the MVHR when the PM2.5 value goes above 25µg/m³ for five minutes and to turn back on once it goes below 25µg/m³ for five minutes.

The air quality is regularly very poor (200-300 µg/m³ PM2.5) where I live so carbon filters would have limited benefit. While not condoned, I installed a WiFi switch on the power input to the MVHR unit and switch it on/off automatically based on the PM2.5 readings from an air quality monitor. If this ever has an impact on a warranty claim, I will live with that rather than risk the health of my family.

Do you use emoncms with your Samsung heat pump? If so, what are you using to report data to it? I have the 8kw version but am looking to see how best to monitor the operation since Samsung don't seem to support any type of data export.