Use wha your landlord gave you-
“Use Your Thermostat
Turning up the temperature during the summer and turning it down during the winter are great ways of putting your thermostat to work for your wallet. The Department of Energy (DOE) recommends setting the air conditioner to 78 degrees and the furnace to 68 degrees to keep your house comfortable while reducing your energy costs and decreasing the demand on the energy grid. A programmable thermostat lets you make the house hotter or cooler during periods when you aren't home.”