Kitchen boilers are ideal for high-volume hot drink service, as they maintain water at a consistent temperature and are more cost-effective than repeatedly boiling a kettle for over 110 cups a day.
Portable units ideal for mobile catering or sites without a mains water connection. Water must be added manually.
Home systems are significant investments that impact both comfort and monthly utility bills, which account for about 18% of a home's energy use. Water Heater Buying Guide - Consumer Reports