Some of these boilers can last up to 50 years or more, but even with decent annual maintenance, their efficiency is much lower than that of current cast iron boilers. Often, the energy savings of replacing a new boiler almost covers the cost itself in a year or two. When properly installed and maintained, homeowners can roughly expect a conventional cast iron water boiler to last 20 years or more. What is the life expectancy of your boiler type? While proper boiler room maintenance can ensure that your boiler will operate reliably to the end or beyond its lifespan, your boiler will only last so long.
Scotch Marine boilers, made of steel, can last more than 50 years. Cast-iron sectional boilers can last between 20 and 30 years. Newer condensing boilers have a life expectancy of 15 to 20 years. When considering repairing or replacing a boiler, first assess the condition of the metal from which the boiler is made, by any available means.
Rust-colored stains on the floor below the drain pipes are a sure sign that a boiler is damaged by excess feed water. This saves the time and cost of reinstalling and wiring the boiler, and could save the cost of applying for permits if the work is considered a repair. Temporary sources of heat and hot water range from electric heaters and temporary water heaters to a mobile boiler. Steam heating systems in apartment buildings have steam return pipes that extend above or below the basement floor to return water to the boiler.
Low-pressure boilers (with a maximum of 15 psig) are generally repaired by welding new steel plates instead of damaged steel, but high-pressure boilers are not safe once they are structurally damaged. The second driver (oversized boiler) alternates between stepping on the accelerator and reaching 120 MPH and pressing the brake pedal to stop again. The owner's willingness to spend money on the boiler and the enthusiasm of the people who work on it are reduced, until, finally, the boiler barely works and everyone involved advocates for its replacement. Specifically for boiler systems, heat exchangers must be cleaned annually to reduce heat exchanger corrosion.
If no new water enters a boiler and the water does not absorb oxygen from exposure to air, there is very little oxygen available to oxidize the boiler and there is no source of minerals that form scale. Many of the boilers installed in the United States are too large for the spaces they heat. Soon the room looks and smells so bad that people, including those who work on the boiler, want to spend as little time as possible in it. Choose the rebate that best applies to your boiler replacement project and generate the biggest savings.
A 30-year-old boiler contains a heat exchanger and a burner, it's not much more than heating some water on a real fire (which breaks even less than an old boiler). Periodically replacing anodes can extend the life of a water heater or boiler, although new boilers are often not equipped with anodes.