DEL 50 degree celsius instant hot water on demand

How do I know if I have 3 phase power available at my property?

I have 3 phase power at my property, can I install a DEL AU instant hot water system?

I have a 3 phase electric instantaneous unit I want to replace, what Stiebel Eltron system should I select?

What size instantaneous electric water heater do I need for my apartment or house?

What hot water temperature can the DEL AU water heaters deliver?

Does the DEL AU need a tempering valve to limit the hot water to 50 Degrees Celsius?

Where can the DEL AU instant hot water system be installed?

How far can the water heater be installed from the hot water outlet?

How efficient is an instantaneous electric water heater compared to an electric storage hot water system?