What are most important requirements for a gas- fired room heater to be used effectively safely

The safety requirements to ensure that the use of a gas-fired room heater is hazard-free are:

Regular testing and servicing of the gas heater by trained and licensed professionals at least  

Keeping strictly to the instructions in the manual

Proper maintenance. Ensure you fix any damages very quickly. Allowing them to degenerate could prove fatal.

Be Carbon-Monoxide-poisoning-effect savvy.

Explanation

A)  Regular checking and testing gas-powered heater systems will help with the early detection of faults and ensure pre-emptive maintenance. This is a way of checking to see potential faults and preventing them from ever occurring;

B) As with any device or system, going outside the ramifications of the instructions provided in the manual is to do so at one's risk. Keeping to instructions help to minimize the potential damages and lowers risk factors thus ensuring safety;

C)  Maintenance is the replacement of worn parts or damaged parts. This is a no-brainer. Valves, rubber stoppers, pressure gauges, etc are ancillary equipment that may develop faults from time to time due to wear, age, and usage. Replacing them timely protects the user from the hazardous effects of not doing so.

D) Carbon-Monoxide Poisoning is one fatal effect of a gas-fired room heater.  

Some of the effects besides the ultimate fatality are:

•Chest pain

•Confusion

•Dizziness

•Headaches

•Nausea

•Shortness of breath

•Tiredness

•Weakness

It is also advisable to have very good ventilation so that air can travel in and out of the room.

Cheers