Monitoring air temp the space stays a relative constant temperature. Monitoring floor temp and the space temp will swing with the outdoor temp.
For a shop you want to run of space temp. We did some floors that the customers just wanted them "tempered". Typically the floor heat was installed around the outside edge of the building. We would set the floor temp for 70 - 75F and leave it. It was done to keep the floor warm, not heat the space.