rabudde
2016-10-26 21:25:34
- #1
Hello,
I know it depends on many factors, but I have to make a decision within the next 2 days. We are building a bungalow (164 sqm) and included in the offer is a Vaillant flexoCompact 88/4. This has a 185L hot water tank. Now, we have been offered to use a separate 270L stainless steel tank from Vaillant instead of the integrated one for an additional 800 EUR. We are 4 people, including 2 children in elementary school age — so water consumption will certainly increase. However, we generally shower and bathe rarely — for now. Unfortunately, I cannot quantify what our actual consumption would be. The last years show a cold water consumption for hot water of 23-27 cbm in the utility bill. The house will have two showers (HansGrohe Croma Select E with a flow rate of 14L/min) and a bathtub with about 170L net water volume. Shower and bath temperatures should be guaranteed at a minimum of 40°C.
Now I thought: bigger tank — lower temperature necessary. The house will have a circulation line, and I believe the bigger tank can somewhat compensate for losses along the way. I am torn about what is more efficient in the long run considering hygiene (if we put the purchase price aside). 185L or 270L? Any tips?
I know it depends on many factors, but I have to make a decision within the next 2 days. We are building a bungalow (164 sqm) and included in the offer is a Vaillant flexoCompact 88/4. This has a 185L hot water tank. Now, we have been offered to use a separate 270L stainless steel tank from Vaillant instead of the integrated one for an additional 800 EUR. We are 4 people, including 2 children in elementary school age — so water consumption will certainly increase. However, we generally shower and bathe rarely — for now. Unfortunately, I cannot quantify what our actual consumption would be. The last years show a cold water consumption for hot water of 23-27 cbm in the utility bill. The house will have two showers (HansGrohe Croma Select E with a flow rate of 14L/min) and a bathtub with about 170L net water volume. Shower and bath temperatures should be guaranteed at a minimum of 40°C.
Now I thought: bigger tank — lower temperature necessary. The house will have a circulation line, and I believe the bigger tank can somewhat compensate for losses along the way. I am torn about what is more efficient in the long run considering hygiene (if we put the purchase price aside). 185L or 270L? Any tips?