Well insulated houses and Large tropical fish tanks

[Jenki]

Prompted by a side track in this thread. 

 

Has anyone who's built an  energy efficient / Passive house installed a large tropical fish tank _400L +?  With the water sat in the tank at around 26 deg, how does this affect the house?

Loved having a large tank in the last house and the above thread made me think It might be a good idea to add a warm fill  and waste to a suitable tank location for the future, then the rabbit hole opened up and I started thinking about the effect on the house heat? 

 

[SteamyTea]

You can model the tank as a small house.  So calculate the surface area, then the u-value of the glass, then the temperature difference.

Just to make it more fun you can calculate the evaporation losses.

https://www.engineeringtoolbox.com/evaporation-water-surface-d_690.html

 

Then treat the fish tank as a heater and see how it affects the room heat losses.

 

Or just go to the local park and nick some goldfish.

Edited May 10, 2023 by SteamyTea