local heating and cooling 4

https://ace-wiki.win/index.php/Smart_HVAC_Maintenance_Tips_for_Homeowners

Local heating and cooling means you're not blasting the AC for the whole house when you're just in the bedroom. It's about using a space heater under your desk in winter or a small window unit to cool just the room you're in. Instead of paying to condition empty spaces, you focus the energy where you actually are. It's more efficient and saves money because you're not wasting power on the guest room or the basement you never use.