Indiana Administrative Code
Title 170 - INDIANA UTILITY REGULATORY COMMISSION
Article 6 - WATER UTILITIES
Rule 3 - Central Station Hot Water Heating Utilities
Section 3-18 - Customer request for test; application to utility

(a) In case of complaint by a consumer alleging inadequate service, the utility shall immediately investigate the heating system on said consumer's premises, taking such measurements and data as may be necessary to disclose the difficulty. If the utility is at fault it shall remedy the trouble as soon as practicable. If the utility is not at fault it shall recommend to the consumer in writing what changes should be made to give the desired service.

(b) Evidence of the adequacy of service shall be that, with all radiator valves open and radiators free from sediment, the average temperature of the flow and return water, measured at or near the point of entrance of the service pipes to the building, shall not be less than the day schedule of temperature given in the table of average temperatures of flow and return.

(c) Evidence of the adequacy of the number of square feet of radiation set shall be that, with all the radiator valves open and radiators free from sediment, and the average temperature of the flow and return water maintained as given in table of average temperatures for the day schedule, making allowance for temperature-lowering effects of wind velocity, and with the outside openings, such as doors and windows, etc., properly closed and maintained so as to exclude the outside air in cold weather, and the utility furnishing at least six pounds of water per square foot of radiation, and with the pressure differential between flow and return pipe maintained to at least one-half pound per square inch working pressure and the inside building temperature maintained at 70 degrees Fahr., then and in that case the number of square feet of radiation shall be considered as adequate.