The price of installing an oil heating boiler is about $2800-$6700. An oil heating boiler is a vital part of any building. It converts the oil into heat, which can be used to warm up your house or office. The oil heating boiler needs regular maintenance and repair to ensure it is working efficiently at all times. Good maintenance and repairs are important because they help keep the oil in good condition and also ensure that the machine doesn’t break down when you need it most.