Safety

1. Be sure to check the function of the Temperature/Pressure relief valve on the water heater or water boiler installed in your home by depressing the lever slightly and release a small amount of hot water onto the floor. If it does release and reseal than all is good. If it either doesn't release or doesn't reseal then for the small cost of a new valve, or to get your rental provider to come and replace it, is a small price to pay for safety.

IF THIS VALVE MALFUNCTIONS THE RESULT CAN BE SO CATASTROPHIC THE HOME MAY BE LEVELLED .

This test should be carried out annually
 
2. Replace your furnace filter regularly, monthly, bi monthly or quarterly as required by your environment. If plugged in winter the result can be overheating of the furnace heatexchanger because of a lack of airflow. CRACKS MAY BE THE RESULT. Then Carbon Monoxide may enter the home. If plugged in summer then the AC coil may freeze up, again due to lack of adequate air flow. When this melts water will cascade over the heatexchanger causing rust. Again premature failure of the heatexchanger may result with the possiblility of CO entering the home.