Over the long term, gas-fired boilers are generally less expensive and less noisy than oil-fired models. The gas-versus-oil debate normally occurs in northern parts of the United States where winter weather can get very cold.
Gas-fired boilers can be hooked up to nearby residential gas lines supplied by utility companies. Although the initial cost to hook up to the line may be expensive, this obviates the need to have regular visits from a propane or oil delivery truck. Delivery services may get erratic, offer different rates and sometimes trucks cannot reach a property due to inclement weather.
A utility company may offer a low charge to run a gas line into a house to replace oil-based equipment. Gas meters from a utility company can monitor a gas-fired boiler's efficiency, and the utility company can suggest improvements.
Some oil-fired boilers have oil tanks in the house, and these tanks can take up a lot of space, produce a foul odor and seem unwieldy. Although a gas tank can be an eyesore outside, it keeps flammable materials away from the house.
Oil-fired equipment tends to be louder than gas-fired boilers. Several remedies come into play, such as getting a different fuel system or installing noise-reduction measures. Contractors can also move oil-fired tanks and equipment away from quiet rooms so the sound becomes less annoying.