What energy source is coal oil and gas collectively referred to as?

Coal, oil, and natural gas are collectively referred to as fossil fuels.

Coal, oil, and natural gas are fossil energy sources and are non-renewable, non-renewable energy sources. Minerals like coal, oil, and natural gas are produced in the shortest period of 10,000 years. From the deposition of organic matter, compaction, burial, and then through a series of evolutionary processes, this time is as short as tens of thousands of years, and the longest is calculated in millions or even billions of years.

Use of gas-burning appliances precautions

Use of gas-burning appliances in line with the requirements of the gas source and with flame failure protection device, gas-burning appliances should be installed in a well-ventilated kitchen, shall not be installed in bedrooms, bathrooms, living rooms, basements.

The use of gas-burning appliances in the room should be installed at the same time hoods, exhaust fans and other exhaust facilities, gas water heaters, gas heating furnace need to install a special flue, indoor use of gas water heaters are strictly prohibited direct-vent.

Gas-burning appliances (except household gas stove) should be installed by qualified units installed before the installation should be to the gas supply business for the relevant procedures to meet the conditions before installation.