Cleaning the heat exchanger is essential to ensure its longevity. The procedure should be carried out with the appropriate equipment to remove scale and impurities.
Periodic heat exchanger cleanings are essential because scale formation can quickly result in overheating, tube failures, increased energy consumption and a rise in operational costs. Scale may even corrode equipment if left without proper care, requiring intensive repairs or total replacement to correct.
Boiler service
The gas burner should be removed (or the inspection plate) to inspect the heat exchanger and electrodes. These can be cleaned and the heat exchanger washed, cleaning the heat exchanger on an annual service helps massively to increase the efficiency and reliability of the boiler.
Boiler cleaning or descaling: $150–$350. Hourly rates for service and repair: $45–$200. Average repair costs: $150–$750.
Cleaning-In-Place (CIP) equipment can clean plate heat exchangers without disassembly. CIP is a combination of time, temperature and concentration. CIP provides both chemical and mechanical cleaning to the heat exchanger.
The heat exchanger should be thoroughly flushed with clean water to remove any insoluble debris prior to being passivated by circulating a solution containing 0.25 litres of ALKBUILD or 0.5kg of NEUTRALISING POWDER per 100 litre of water through it for 15 minutes.
A heat exchanger can, however, often last for 15 to 20 years or more with good care and normal operating circumstances.
RYDLYME is the perfect heat exchanger cleaning chemical to circulate and remove mineral deposits from heat exchanger tubes! Heat exchanger cleaning is made easy with RYDLYME Biodegradable Descaler. Simply circulate RYDLYME through the heat exchanger tubes removing mineral and scale build-up in a safe and timely manner.
Both the parts and labour for this job are extremely expensive unless: The boiler is new, it will be under warranty, so you won't have to pay to fix it. If the boiler is old, there's no point in investing in a unit that is slowly deteriorating, you should replace the boiler.
Over time, the water in the heat exchanger can cause limescale to build up. This limescale can cause blockage and inefficiency. When it does, it causes the water to get hotter too. As the water comes to a boil, the build up of bubbles and steam will cause a whistling noise.
Around how long does it take to have a boiler serviced? On average, a standard boiler service takes about 30 to 60 minutes. This should always be carried out by a Gas Safe registered engineer. However, this duration can vary depending on several factors.
With a boiler, the heat exchanger will not be visible for inspection. As you examine the burner area note if there is any evidence of leaking from the heat exchanger onto this area. In many cases there would be signs of rusting, corrosion, flaking metal, or water seepage and even dripping water.
Can you repair a broken heat exchanger? The reality is that it typically does not make much sense to repair a boiler with a broken heat exchanger as the costs of the parts and labour are expensive.
And remember, trying to replace a heat exchanger without professional assistance can pose potential hazards such as carbon monoxide poisoning and other safety risks.
Clogged filters reduce the air flow that result in development of cracks inside the system. Other reasons for reduced air flow are the dirty fan blades, dirty duct work, and obstructed air vents. All of these factors can cause major damage to the heat exchanger.
What does it cost to clean my heat exchanger? All units are hydrotested before and after cleaning. For fixed tube units less than an 8" shell, typical costs are $200-$300 and includes gaskets. For removable nest units and fixed tube units 8" and larger, the price will generally be higher.
There are a variety of cleaning methods available, including chemical cleaning, mechanical cleaning, and high-pressure jet washing. These methods can help to remove dirt, debris, and other buildup from the heat exchanger's surfaces, restoring their efficiency and prolonging their lifespan.
Don't forget when looking at these tubes, the water passes back and forth 3 times and the tubes that look relatively clear in the bottom section of the picture are the exit end in one pass. I choose to use distilled vinegar to clean the heat exchangers on my Yanmar.
Household Chemicals – Believe it or not, corrosion can form on the heat exchanger. Things like hair spray, fabric softeners, and bleach can enter the air stream, pass the filter, and attach to the heat exchanger for good. Over time, the chemicals bore a hole through the metal and cause it to fail.
While it's not impossible for boilers to last 30 years when properly maintained, it's their efficiency that is the concern. Older boilers are less efficient than modern boilers, making them more expensive to run in the long term.
Unfortunately, the cost of replacing a heat exchanger isn't the most affordable choice. The cost of replacing a heat exchanger ranges from $2,000 to $3,500. Replacing your furnace's heat exchanger would be a good route to take if your furnace is fairly new.
Water with a descaler additive is an effective means of removing accumulated dirt, deposits, and contaminants from the heat exchanger. Thanks to high pressure, water reaches hard-to-reach places, ensuring effective cleaning. It's also advisable to leave the exchanger filled with descaler, for example overnight.
Boiler flush and descaling cost
A boiler system flush costs $150 to $600 on average.
RYDLYME descaler is non-hazardous to the personnel who perform the cleaning and disposal is simple upon completion of the cleaning; as RYDLYME descaler is biodegradable. Our biodegradable and innovative descaler, RYDLYME, is the universal product of choice for heat exchanger scale removal.