“Now it’s clear why your boiler is full and the radiators are barely warm”: the plumber was wrong and the owner was wrong 5 years ago

A friend of mine bought a house with an area of ​​120 square meters. After living there for five years, he decided, given the increase in his family, to expand it. Instead of building additional buildings, it was decided to equip an attic.

The family had to endure repairs for three months and the day came when a team of plumbers came. You will need to regulate the heating on the new floor. When connecting and testing the new heating branch, the plumbers noticed an interesting moment: the boiler temperature was set at +85 degrees. Turns out the owner of the house always said it that way because the radiators weren’t really hot.

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The house had expensive radiators and a 24-kilowatt Baxi Ecofour gas boiler, but it could not properly heat the 120-square-foot house. The reason was the wrong choice of pumps for heating.

The Italian high-speed pumps were set at maximum speed, resulting in rapid circulation of hot water and insufficient cooling in the radiators. As a result, the boiler was quickly shut down, assuming the house was heated.

The solution to the problem turned out to be simple: replace the pumps with less powerful ones and set them to the minimum speed that allowed it to reach the usual 30 liters per minute. After that, the house began to warm up pleasantly to a temperature of +50 degrees instead of +85 degrees as before.

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It’s likely that the plumbers initially set the pumps to the maximum speed to remove air from the system, but left it that way. This small mistake cost the family five years of their life in discomfort.