How long will a gas appliance last?
Depending on usage and regular servicing, average lifespan 12 - 15 years. Well looked after appliances can last as long as 30 years.

What are the advantages of gas appliances?
There is an exceptionally wide variety of heat selections for gas burners. The size of the flame can be easily controlled to fit the skillet or pot selected. The on/off heat is almost instantaneous-cooking begins almost immediately when the flame is turned on and ends when the flame is turned off. The heat exchange between the flame and the pot or skillet is very efficient if the flame is adjusted correctly.

How to use gas appliances for best performance?
When using gas appliances, the size of the pot or pan selected should match the quantity of food to be cooked. While this may seem over-simplified, selecting too large a pot will waste energy, and selecting too small of a pot can result in spillage and splatter. Care should be taken to adjust the flame properly to fit the bottom of the pot or pan. An excessive flame will not only waste energy, but could result in uneven cooking and actually slower cooking, than a flame fitting the bottom surface of the pot or pan.
In the summer, when using more than one burner of the oven, the range exhaust vent should be used. The speed selected for this exhaust fan should be based upon the heat being generated by the oven or burners. In the winter, this operation is not as critical, although it might be desirable to carry off cooking odors and fumes.

How to maintain gas appliances?
Gas appliances are relatively easy to maintain because they have no moving parts. The burner surfaces should be kept clean, and the gas ports open. The flame should be adjusted so that it is clean and blue. A yellow flame is both dirty and inefficient, and indicates there is not enough air for combustion. On the other hand, a very light blue flame that is sputtering, and hissing indicates there is too much combustion air. The optimum amount of air produces a blue, quiet flame and will leave no residue on the pan. Generally, once the settings and adjustments are made, very little, if any, re-adjustment is necessary. If the stove is equipped with a pilot light, the pilot light should be adjusted, so it is as small as possible to accomplish the function intended. An excessive pilot light will tend to warm the room and use more gas than necessary.