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I'm building a new home which requires hard-wired smoke and CO detectors. I had planned on using the System sensor COSMO-4W. But since the pandemic started, it's been impossible to get these ANYWHERE!  Does anyone know of a different manufacturer of a combination smoke/CO unit?  I don't think I...

I have a crazy situation that I can't explain. I'm hoping someone here can confirm that I'm not going mad.    I purchased an Elk 6022 wireless sensor along with some wired garage door sensors to wire to the 6022. The 6022 has one magnetic reed switch, but also two wired ports for external...

I'm a homeowner an Elk M1G installed myself in 2009, with the serial interface and HAI Omnistat thermostat. Recently I had the 30 year old furnace replaced, and coincidentally the thermostat stopped working. The furnace contractor confirmed it stopped sending the call for heat to the furnace...