Minnesota Administrative Rules

4715.2190 COMBINATION WATER AND SPACE HEATING EQUIPMENT.

Equipment used for heating domestic or service hot water and for space heating must be installed with a mixing valve to permit the user to control the temperature of the domestic or service hot water regardless of the space heating demand.

The installation must include a drainage port and isolation valve to permit the user to purge the heating coils to waste after the nonheating season, or the system must be designed to automatically prevent stagnation.

The water heater must be specifically designated by the manufacturer for use as a combination hot water and space heater.

All pipes, joints, and appurtenances in the system must be of a type approved for potable water distribution. This provision is not intended to address the wall thickness of heating coils, which must be the responsibility of the manufacturer.

Statutory Authority:

MS s 16B.61; 326.37 to 326.45; 326B.106; 326B.43 to 326B.49

History:

15 SR 76; L 2007 c 140 art 4 s 61; art 6 s 15; art 13 s 4

Published Electronically:

October 3, 2013