Ecobee Total Home Comfort and Security Bundle review: An underwhelming home security solution

The sirens are not at all loud--just 76dB for each device--and would at best annoy an intruder versus driving them out of the house the way a more robust siren would (not to mention possibly garnering the attention of your neighbors). But the bigger problem with the siren is that it doesn't sound off automatically in the event of breach. Ecobee instead depends on you to push a button in the app to trigger it. So, if you don't hear the alert, or you ignore it, the intruder won't know they've been detected and might be inclined to hang out in your house longer. It's also worth repeating here that Ecobee Haven is a self-monitored security system.