The Austin Central Heating company will help you protect the substantial investment you've already made in your air conditioning and heating system. They offer preventative maintenance programs that are designed to maximize the efficiency of your system while minimizing repair and utility bills.

A central heating system has a primary heating appliance such as a furnace or boiler located in an out-of-the-way spot such as a basement or garage. It delivers heat throughout the house either by pumping warmed air through a system of air ducts or sending hot water or steam through pipes to room radiators or convectors.

I read that having a programmable thermostat in your house is very advantageous when you have a central heating/cooling system.