Authority: IC 13-14-8-7; IC 13-17-1-1; IC 13-17-3-4

Affected: IC 13-17-1-3; IC 13-17-3

Sec. 4. (a) All outdoor hydronic heaters that have not been certified to meet the emission limits in 40 CFR 60, Subpart QQQQ*, must have a permanent stack extending five (5) feet higher than the peak of the roof of any occupied building:

1. (1) located within one hundred fifty (150) feet of the unit; and
2. (2) not located on the same property on which the heater is installed.

(b) The maximum stack height required under this rule is twenty-two (22) feet above the ground.

*Copies of this document may be obtained from the Government Publishing Office, www.gpo.gov, or are available for review at the Indiana Department of Environmental Management, Office of Legal Counsel, Indiana Government Center North, 100 North Senate Avenue, Thirteenth Floor, Indianapolis, Indiana 46204.

(Air Pollution Control Division; 326 IAC 4-3-4; filed Apr 18, 2011, 11:27 a.m.: 20110518-IR-326050332FRA; readopted filed Jun 29, 2017, 9:25 a.m.: 20170726-IR-326170226BFA; filed Mar 27, 2018, 4:24 p.m.: 20180425-IR-326160332FRA; readopted filed Oct 18, 2024, 2:09 p.m.: 20241113-IR- 326230809RFA)