You are on a showing with an agent who is not experienced and has not bothered to learn the parts of a home.
This is when you get to play "Can you Identify": Is it a heat pump? a natural gas furnace? a geothermal unit? Do the baseboard electric units have a central thermostat or are they individually controlled and what is the rectangular box on the wall that looks like a window air conditioner but is blowing warm air?
When you are ready to work with an agent who will explain and educate you but not make you feel like you should know the answers to all these questions give mw a call. I'll give you accurate, useful information.