Im guessing yes!
Owner of HVAC contractor in our area, responsible for upkeep and warranties of HVAC equipment for the most lucrative new home builder in area, says no way.
quote : "The ones the (utility co.) use are upwards of 600$!". Yeah like he couldnt afford it buddy. He found it amusing that I would ask for their techs to bring one after a first visit without one.
I asked "doesnt your installers have to check for CO in the flues on new install?" and I got some generic answer.
Am I way off base thinking a precision low level CO detector is standard on every HVAC service truck??