Doing some research on thermostats, specifically ones that can be ‘locked’ so people can’t mess with them. Ideal for landlords or shared spaces like hallways.

Here is what I found:

Chicago Controls (AKA landlordstat.com) – their stuff is a bit limiting in the temperature ranges they offer. Can’t be changed by a tenant as the temperature is burned into the motherboard.

King Electronics offers several models that are programmable, most are set by jumpers on the motherboard so easily altered by tenants. Available from Amazon, also found e-volt in Canada that sells them.

Accustat they market a product line that the temperature is controlled by installing different mercury-based thermometer ‘keys’. You order the thermometer that relates to the temperature you want to set. Interesting idea.