Stage #1 Boiler Sits Cold No call for heat or hot water, all of home's heating zones are currently satisfied. SYSTEM 2000 sits idle at near room temperature awaiting instructions from the Digital Energy Manager. No energy is being expended to keep the boiler heated. Hot water in the heavily insulated storage tank is ready for immediate use. Website Credits ©1997-2004 Energy Kinetics, Inc. All rights reserved. For more information call 1-800-323-2066.