Even if it doesn't make sense to go out and buy a new heating system for your house, you can realize substantial savings by boosting the efficiency and performance of your existing system. YOU CAN DO Clean air filters . About once a month, check filters on furnace and heat pump heating systems.
Dust blocks air flow and reduces the efficiency of the system.
Vacuum registers and make sure furniture does not block them . Bleed trapped air from hot water radiators . Once or twice a season, put a pan under the bleed valve and open it slowly until air comes out. Let the air escape until water drips out, then close the valve. Some systems require a special tool called a radiator key to turn the valve.