<http://firestat.net/which-switch-or-sensor-is-best-for-your-hvac-system/#webpage>
<http://schema.org/description>
"Senasys manufactures a wide array of temperature switches for HVAC systems including bi-metal snap disc and duct limit temperature switches."
<https://firestat.net/which-switch-or-sensor-is-best-for-your-hvac-system/>