This sets at what CO2 level the thermostat will start a Demand Ventilation cycle at.
What are the configuration options?
800 PPM (default): If the CO2 levels raise above 800 PPM, a demand ventilation cycle will start.
400 to 799 PPM: Outdoor CO2 levels are around 400 PPM, so the lower you set this configuration, the more often a demand ventilation cycle will run.
799 to 2000 PPM: The higher you set this configuration the longer the thermostat will wait before starting a demand ventilation cycle. It is generally not recommended to set this above 1000 PPM.
What happens when a Demand Ventilation cycle starts?
The thermostat will start the supply fan to bring more outdoor air into the room.
Why is the default 800 PPM?
Most ventilation codes and regulatory organizations (ASHRAE – American Society of Heating, Refrigerating and Air-Conditioning Engineers) recommend rooms be at their maximum ventilation rates when CO2 levels reach 1000 ppm. While anytime a room is below 1000 ppm, ventilate can be at a minimum rate ( both of these rates are determined by professionals trained on local ventilation codes).
Pelican default CO2 Ventilation configuration is 800 PPM because we believe that you should begin increasing the ventilation rate before reaching 1000 PPM. This makes Pelican’s ventilation adjustments more dynamic, instead of just going from the minimum to maximum ventilation positions as CO2 levels move.
How do I add this to my thermostat?
If your thermostat did not come with a CO2 sensor, then you will not see this configuration. To add this configuration and logic, you will need to purchase a Pelican plus50 and add it to your thermostat.