Hot water temp in bathroom
Discussion
Trying to figure this out.
Never used to have a problem getting nice hot water in the bathroom upstairs. Then we had to get a new boiler 2-3 years ago as the old one got condemned. There was no difference to the upstairs hot water.
Then one day, there was. But this turned out to be due to the HE in the new boiler becoming blocked. The system had been flushed but I guess rust/sludge got dislodged and managed to get by all the new filters and into the HE. The symptom here was pulsing hot water, because the flow temp would rapidly rise to its 80 degC limit and then the boiler would shut down and then restart when the flow temp dropped. The HE wasn't taking enough heat out of the flow to put into the cold water due to the very low flow in the HE.
This time though, the water just feels like it isn't really that hot. The boiler shows its giving out a hot water at constant 65 degC (its max setting) and the flow temp is 80degC (also max) and the return is 58degC. Yet to run a bath you might want to get in, I just have to run the hot tap only. Water is coming out around 40degC and once in the bath that ends up 37-38degC.
The shower is also affected. Turning the mixer above the 38degC limiter, yields nothing (though we've always run above the limiter because that has never felt like 38degC). IF the boiler is to be believed, its kicking out water at the set point temperature just fine. That would point to heat loss along the pipe work before it goes to the bathroom... however, we've never had a problem before, and although its gotten colder, its still quite mild. We've been able to have toasty hot showers in the depths of winter before now and the pipework hasn't changed.
So what might it be? where is all my heat going?
Never used to have a problem getting nice hot water in the bathroom upstairs. Then we had to get a new boiler 2-3 years ago as the old one got condemned. There was no difference to the upstairs hot water.
Then one day, there was. But this turned out to be due to the HE in the new boiler becoming blocked. The system had been flushed but I guess rust/sludge got dislodged and managed to get by all the new filters and into the HE. The symptom here was pulsing hot water, because the flow temp would rapidly rise to its 80 degC limit and then the boiler would shut down and then restart when the flow temp dropped. The HE wasn't taking enough heat out of the flow to put into the cold water due to the very low flow in the HE.
This time though, the water just feels like it isn't really that hot. The boiler shows its giving out a hot water at constant 65 degC (its max setting) and the flow temp is 80degC (also max) and the return is 58degC. Yet to run a bath you might want to get in, I just have to run the hot tap only. Water is coming out around 40degC and once in the bath that ends up 37-38degC.
The shower is also affected. Turning the mixer above the 38degC limiter, yields nothing (though we've always run above the limiter because that has never felt like 38degC). IF the boiler is to be believed, its kicking out water at the set point temperature just fine. That would point to heat loss along the pipe work before it goes to the bathroom... however, we've never had a problem before, and although its gotten colder, its still quite mild. We've been able to have toasty hot showers in the depths of winter before now and the pipework hasn't changed.
So what might it be? where is all my heat going?
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