For the most part, you probably are not going to have much direct interaction with the bulk of your heating and cooling system. Sure, you should definitely be changing your air filter regularly, but aside from that, you don’t really see much of the system, let alone interact with it. A major exception to this rule, of course, is your thermostat.
It is with your thermostat, after all, that you control your HVAC system at large. Without it, you’d have no say in how your system heats or cool your home. Considering the important role that it plays, it really is very important that you are using your ideal thermostat in Washington, D.C.