In hot water
When we bought our house about 9 years ago, it came with a tankless water heater that had only been installed 5 years prior. This was something new for us because in the US we had always had a tall, well-insulated tank (the bigger, the better) hidden away in a closet, in the basement or in the attic. Now, in the kitchen, in full view, hanging on the wall, was a relatively small box with 5 pipes sticking out of it to supply “endless” hot water to the faucets, shower head, and radiators scattered around the house. It takes a pump to circulate that water upstairs and down and we had already replaced it twice since we had lived here so when that familiar knocking sound returned we knew it was time for a replacement of the heating system.
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