Indiana Administrative Code
Title 170 - INDIANA UTILITY REGULATORY COMMISSION
Article 6 - WATER UTILITIES
Rule 3 - Central Station Hot Water Heating Utilities
Section 3-25 - Estimate of required radiation; formula; table of factors

(a) As a tentative basis for the billing of contemplated new consumers and of such other consumers where there is complaint of inadequate service indicating insufficient radiation, each utility shall measure the buildings and premises of said consumers for radiation required by the formula and as set out in the table showing temperature-lowering coefficients of wind movements.

(b) Upon the request of any consumer, or the commission, the utility shall furnish a complete detailed set of figures and data relating to the radiation requirements, in said consumer's premises, upon which it is proposed that the consumer is to be billed for heating service.

(c) The utility supplying hot water heating service shall not be required to contract with any consumer to heat only a part of the used portion of a building, residence, or apartment where such other parts of the building or buildings are not provided with adequate radiation suitably connected.

Table Showing Formula for Estimating Radiation

R = C × Fc + (E-W-D) × Fe + (W × Fw) + (D × Fd)

Where: R = Required radiation in square feet.

C = Cubic feet of contents.

E = Square feet of exposed walls.

W = Square feet of windows.

D = Square feet of doors.

Fc = Factor for cubic contents as shown in table.

Fe = Factor for exposed walls, ceiling or floors as in table.

Fw = Factor for windows as shown in table.

Fd = Factor for doors as shown in table.

Table of Factors