Checking and maintaining boiler efficiency requires regular testing to ensure that the boiler is running at optimum performance levels. Usually the range will be between 75 and 80%. If your boiler is operating at 50% and below this is a sign that regular testing and adjustments are not being done.
Making sure that your boiler is running smoothly has many benefits. For one it will reduce the energy consumption. If a boiler is working properly and efficiently maintained it will not need expensive repairs down the road. It will also mean a longer life.