TurboMax Instantaneous Indirect Water Heater

Big thanks to Bob Fairbairn @BobonStereo and Andrei Nitu for sharing their expertise! Join the world's best year-round conference on building science for as little as $5: https://www.patreon.com/HomeDiagnosisTV Get 1-on-1 help with any home or training for pros: https://buildingperformanceworkshop.com/ LINKS TO MENTIONED PRODUCTS, AS PROMISED: Home Assistant is the Grand Daddy of building a locally controlled smart home, using a very broad range of devices and software https://www.home-assistant.io/ The Home Assistant community forum is a great place to learn: https://community.home-assistant.io/ CAS-IOT is a standards body that manages both the Matter and Zigbee system designs https://csa-iot.org/all-solutions/matter/ https://csa-iot.org/all-solutions/zigbee/ Aranet Air Quality Monitors https://www.aranet.com/en/home Awair Air Quality Monitors https://getawair.com/ Airgradient Open Source hardware and software air quality monitoring. https://www.airgradient.com/ Aqara sensors, temp/humidity, water leak, presence, etc. https://us.aqara.com/collections/smart-home-sensor Everything Presence, they also have other automation parts, like home assistant devices and antennas https://shop.everythingsmart.io/ Shelly relays, these have basic off/on relays for turning things off and on, as well as more advanced ones that have power monitoring or 0-10V output for controlling variable devices such as fans, inline duct heaters, pumps, control valves, air dampers, some ERVs, etc. https://us.shelly.com/collections/all-products Bosch PM sensor https://www.mouser.com/ProductDetail/Bosch-Sensortec/BMV080?qs=7%2F6SraaimPS7uQ3O%2F8i0pA%3D%3D Same sensor in a end user package USB-stick form factor from PurpleAir: https://www2.purpleair.com/products/purpleair-pixel This data sheet from Nordic heat pumps has a good diagram of a dual buffer heating/cooling system with a geothermal heat pump on page 31. You could do the same thing in principle with an air source heat pump, too https://www.nordicghp.com/wp-content/uploads/2025/06/002743MAN-01-W-WP-R454b-WH-R513a.pdf This is that Ask This Old House clip of them installing a heat reclaim valve to heat a pool https://www.youtube.com/watch?v=J7fB8ul9dZw The Heat Geek Mini Store https://newarkcylinders.co.uk/heatgeekministore/ TurboMax tank wich is the Mini Store's older and much bigger Canadian cousin, ridiculous and lovable, the biggest one can do over a million Btu/h of hot water if you have a powerful enough heat source https://www.thermo2000.com/en/products/turbomax/ These are one example of specific gas sensors, definitely not for consumer use unless you have experience designing and building your own electronics, but could definitely see them being useful as in air quality monitors, perhaps as modules you could swap out depending on your specific concerns, Ozone, or Nitric oxide, or Chlorine if you have an indoor pool for example https://www.spec-sensors.com/product-category/gas-sensor-elements/