alt Hacker NewsI can't remember which is condenser... This heats 300 or 400 liters - about the size of a US tank water heater. Tankless is typically a lot smaller.
I have a tankless in my house and I'm not going back... I wish someone made a heat pump tankless water heater (I don't know if that is possible)
One of the main reasons I went heat pump electric in my house (I could have paid less and stayed with tankless LP gas hot water) is I'm just not that comfortable with gas, especially living in an earthquake-prone country. Even if there aren't leaks it's terrible for indoors air quality, and a worry when you have young kids.
I was worried going from living with tankless to a tank that we would run out of water like we did in my parents house as a kid but so far it's just never been a problem. I think it helps that while the physical water capacity of our unit is 370 liters, the internal temperature is 80 C and it uses a thermostatic valve to blend the output, so the "hot water capacity" is more like 500 liters.