Solar Water Heater O6 - 60 Gallons - Hot Water For 6 People The O6 will cover up to 6 people using hot water. Provide all the hot water needs of an apartment, house, villa... Suitable for domestic hot water, showers and baths, for dishwashers, washing machines, pool, spa... Ready in 45 min, with all pictures installation manual, and installation video. 5 year product warranty.