<html xmlns="http://www.w3.org/1999/xhtml"><head><meta charset="UTF-8" /><title></title><meta name="Generator" content="PowerTools for Open XML" /><style>span { white-space: pre-wrap; } p.s2083e881-cc2e-42dc-b532-fa7139e179ebP0 { margin-top: 0; margin-bottom: 0; margin-left: 0; margin-right: 0; text-indent: 0.00in; text-align: justify; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; line-height: 108%; } span.s2083e881-cc2e-42dc-b532-fa7139e179ebC0 { color: black; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: normal; margin: 0; padding: 0; } span.s2083e881-cc2e-42dc-b532-fa7139e179ebC0-000000 { color: #0000FF; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: bold; margin: 0; padding: 0; } span.s2083e881-cc2e-42dc-b532-fa7139e179ebC0-000001 { color: black; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: bold; margin: 0; padding: 0; } span.s2083e881-cc2e-42dc-b532-fa7139e179eb000002 { color: black; background: white; font-size: 12pt; font-style: normal; font-weight: normal; margin: 0; padding: 0; } span.s2083e881-cc2e-42dc-b532-fa7139e179ebC0-000003 { color: #0000FF; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: normal; margin: 0; padding: 0; } span.s2083e881-cc2e-42dc-b532-fa7139e179ebC2 { color: #0000FF; background: white; font-family: 'Times New Roman', 'serif'; font-size: 12pt; font-style: normal; font-weight: normal; margin: 0; padding: 0; } </style></head><body><div><p dir="ltr" class="s2083e881-cc2e-42dc-b532-fa7139e179ebP0"><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0">    </span><a href="https://sdlegislature.gov/Rules?Rule=44:70:10:22"><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0-000000">44:70:10:22</span></a><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0-000001">.  Filt</span><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0-000001">ration</span><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0-000001">.</span><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0"> A ventilation system using a recirculated central air system </span><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0">must</span><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0"> be equipped with a filter bed. </span><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0">The f</span><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0">ilter bed </span><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0">must</span><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0"> be located upstream of the conditioning equipment and </span><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0">must</span><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0"> have a minimum efficiency of </span><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0">MERV 7</span><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0">. These filter efficiencies </span><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0">must</span><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0"> be warranted by the manufacturer and </span><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0">must</span><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0"> be based on the ASHRAE 52.2, 20</span><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0">12</span><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0"> edition, American Society of Heating, Refrigeration, and Air Conditioning Engineers.</span></p><p dir="ltr" class="s2083e881-cc2e-42dc-b532-fa7139e179ebP0"><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179eb000002"> </span></p><p dir="ltr" class="s2083e881-cc2e-42dc-b532-fa7139e179ebP0"><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0">    </span><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0-000001">Source:</span><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0"> 38 SDR 115, effective January 9, 2012; 46 SDR 65, effective November 26, 2019</span><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0">; 50 SDR 19, effective August 30, 2023</span><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0">.</span></p><p dir="ltr" class="s2083e881-cc2e-42dc-b532-fa7139e179ebP0"><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0">    </span><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0-000001">General Authority:</span><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0"> SDCL </span><a href="https://sdlegislature.gov/Statutes?Statute=34-12-13"><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0-000003">34-12-13</span></a><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0">(1)(3)(4).</span></p><p dir="ltr" class="s2083e881-cc2e-42dc-b532-fa7139e179ebP0"><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0">    </span><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0-000001">Law Implemented:</span><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0"> SDCL </span><a href="https://sdlegislature.gov/Statutes?Statute=34-12-13"><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0-000003">34-12-13</span></a><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0">.</span></p><p dir="ltr" class="s2083e881-cc2e-42dc-b532-fa7139e179ebP0"><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179eb000002"> </span></p><p dir="ltr" class="s2083e881-cc2e-42dc-b532-fa7139e179ebP0"><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0">    </span><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0-000001">Reference:</span><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0"> "ASHRAE 52.2," 20</span><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0">12</span><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0"> edition, American Society of Heating, Refrigeration, and Air Conditioning Engineers.</span><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0"> Copies are available at no cost at </span><a href="https://ierga.com/hr/wp-content/uploads/sites/2/2017/10/ASHRAE-52.2-2012.pdf"><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC2">https://ierga.com/hr/wp-content/uploads/sites/2/2017/10/ASHRAE-52.2-2012.pdf</span></a><span class="s2083e881-cc2e-42dc-b532-fa7139e179ebC0">.</span></p><p dir="ltr" class="s2083e881-cc2e-42dc-b532-fa7139e179ebP0"><span xml:space="preserve" class="s2083e881-cc2e-42dc-b532-fa7139e179eb000002"> </span></p></div></body></html>