# Measuring air change rates with CO2 sensors for heat pump heat loss calculation

**URL:** <https://community.openenergymonitor.org/t/measuring-air-change-rates-with-co2-sensors-for-heat-pump-heat-loss-calculation/25817>\
**Category:** Labs\
**Created:** [20 March 2024 09:17 UTC](https://community.openenergymonitor.org/t/measuring-air-change-rates-with-co2-sensors-for-heat-pump-heat-loss-calculation/25817 "2024-03-20T09:17:50Z")\
**Posts on this page:** 1\
**Showing post:** 104

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**Author:** ![grod55](https://community.openenergymonitor.org/user_avatar/community.openenergymonitor.org/grod55/32/26153_2.png) [@grod55](https://community.openenergymonitor.org/u/grod55)\
**Post date:** [17 June 2024 22:05 UTC](https://community.openenergymonitor.org/t/measuring-air-change-rates-with-co2-sensors-for-heat-pump-heat-loss-calculation/25817/104 "2024-06-17T22:05:48Z")

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Hi Trystan,  
thanks for the update. When you suggest “quite some time” are you thinking of months or years? Having something late this year would work for me.

Regarding Zigbee, I’ll need to look into this. We would plug the ZigBee dongle into the emonPi2 - correct?

Thanks,

Gordon

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