Mixed boilers are becoming more and more popular in new homes because of the money and space they save. A mixed boiler heats the cold water of the running water supply on demand. This eliminates the need for a standard hot water tank and frees 45 to 50 cm of floor space.
In many homes, boilers are responsible for more than half of the energy bill. Replacing an old conventional boiler with a new high-efficiency blender can potentially save you hundreds of dollars a year. For example, replacing an older boiler with less than 70% efficiency with a 90% efficient boiler would save you $ 150 to $ 500 a year.
How does a mixed combination work?
A mixed boiler heats the water like a conventional boiler, but on the other hand, it uses an additional heating circuit. Such a unit directly feeds water from the main pipe to a heat exchanger. A mixed boiler can provide a virtually unlimited amount of hot water while it is running.
The heat exchanger is a critical element of a mixed boiler. It improves the efficiency of the unit by extracting heat from the flue gases. This heat is used to preheat the water. When burning gas or fuel oil, about 8% of the natural energy of the fuel escapes in the form of water vapor discharged. A mixed boiler uses a second circuit to capture a large part of the energy losses.
Water heating details
Mixed boilers can heat the water in about 40 seconds. However, due to the lack of a tank, hot water is not always available immediately. The so-called “storage handsets” solve the problem by keeping a small amount of hot water available on demand. A competent contractor can evaluate your specific needs and make appropriate recommendations.
Consulting a professional
If you need to remove or modify your old boiler, heating and plumbing professional may offer a non-binding quote for the necessary modifications to the gas, water, and ventilation systems. The cost of installing a new energy-efficient combination boiler is likely to be higher than that of a conventional boiler. However, the absence of a tank will eliminate some of the piping while speeding up the installation work. These factors will help reduce installation costs. Long-term energy savings make a combination boiler a cost-effective and environmentally-friendly choice.
The cost of a new heating system is difficult to estimate from a distance. In addition to the boiler itself, modern fittings, pipelines, or heating surfaces may be necessary. We, therefore, recommend the advice of an installer from your area.