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HoisleBauer2228 Oct 2021 00:17During my research, I came across heat recovery systems for shower water (e.g., integrated into drain channels). Is anyone using these here? It might be that the initial purchase and installation costs put their cost-effectiveness into question...
Without having installed this, these are mostly my own assumptions for now:
We need about 10 to 12 kWh per day for hot water. I estimate that around 60% of this is used for showering.
Assuming such a system is installed and manages to recover 50% of the heat, that would be approximately 3.6 kWh per day.
Currently, I pay 7 cents per kWh for gas. So roughly 25 cents per day, or about 90€ per year.
However, this assumes the system is installed on all showers in use.
We need about 10 to 12 kWh per day for hot water. I estimate that around 60% of this is used for showering.
Assuming such a system is installed and manages to recover 50% of the heat, that would be approximately 3.6 kWh per day.
Currently, I pay 7 cents per kWh for gas. So roughly 25 cents per day, or about 90€ per year.
However, this assumes the system is installed on all showers in use.
There was a user here once who built with the same general contractor as I did. The contractor advised against it. We didn’t install it – too uneconomical.
That was in 2017. The reasoning has already been provided by @matte1987.
If your concern is ecology, simply use less water. Most likely, you only need to run the water a few seconds less or set it slightly cooler for the same savings.
That was in 2017. The reasoning has already been provided by @matte1987.
If your concern is ecology, simply use less water. Most likely, you only need to run the water a few seconds less or set it slightly cooler for the same savings.
