How do I determine when HVAC is 'running'?

SharpTools.io (web)
1

I am putting temperature sensors in the registers so I can gauge the delta between the return temp and supply temp. I want to alarm if the delta is not great enough. The problem is that I need the following to happen:

  1. Must determine when the thermostat is calling for heat/cool
  2. Wait 5 minutes and take a reading on the supply temp sensor
  3. Calculate the delta between supply and return temp and notify if the delta is under some amount I determine.

I don’t think I am going to be able to do this without coding, but wanted to see if you had ideas.

Thanks!

2

What type of thermostat are you using and is it connected to smart home platform?

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3

Hi Terri. Thank you for replying. I have spent a lot of time in sharp tools since I made the post and figured out exactly how to do all of this. Thank you!

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