1.1 The purpose of these regulations is to provide the Department of Natural Resources and Environmental Control’s determination of the most recent and/or highest available version of the International Energy Conservation Code and the latest ASHRAE/IESNA standard. The goal of establishing these regulations is to provide a statewide building energy conservation code.
1.3 Delaware Code Title 16 Section 7602 provides the authority for adopting Delaware Energy Conservation Code. These regulations are promulgated under the authority of 16 Del.C. §7602.
“ASHRAE” means the ANSI/ASHRAE/IES Standard 90.1: Energy Standard for Buildings except Low-Rise Residential Buildings published by the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.
“Department” means the Department of Natural Resources and Environmental Control, the Division of Energy and Climate or the Delaware Energy Office.
“DET verifier” means a certified Duct and Envelope Tightness verifier. A certified DET verifier shall be a certified Home Energy Rating Systems (HERS) rater, or be a certified Home Performance with ENERGY STAR contractor, or be a Building Performance Institute (BPI) Heating Professional to perform duct tightness testing or a BPI Building Analyst or Envelope Professional to perform building tightness testing, or successfully complete a course that is approved by the Department of Natural Resources and Environmental Control.
3.1 The 2012 International Energy Conservation Code (IECC), published by the International Code Council, Inc., is hereby adopted and incorporated by reference with revisions as the Delaware Residential Building Energy Code and is an enforceable part of the Delaware Building Codes. The revisions to the 2012 IECC code are stated in Section 4.0 of these regulations.
3.2 The American Society of Heating, Refrigerating and Air-Conditioning Engineers Standards (ASHRAE) 90.1-2010: Energy Standard for Buildings except Low-Rise Residential Buildings and Commercial Provisions of the 2012 International Energy Conservation Code are hereby adopted and incorporated by reference in their entirety as the Delaware Commercial Building Energy Code and is an enforceable part of the Delaware Building Codes.
4.1 The following additions, insertions, deletions, and other changes are hereby made to the 2012 International Energy Conservation Code.
4.1.1 R403.2.2 amend to add: Supply duct tightness shall be verified by either of the following:
1. Post-construction test: Total leakage less than or equal to 6 cfm (169.9/min) per square feet (9.29 m2) of conditioned floor area when tested at the pressure differential of 0.1 inches w.g. (25 Pa)….
2. Rough-in test: Total leakage less than or equal to 6 cfm (169.9/min) per square feet (9.29 m2) of conditioned floor area when tested at the pressure differential of 0.1 inches w.g. (25 Pa) (remainder unchanged – If the air handler is not installed….≤ 4 cfm…)
4.1.2 R403.4.2: amend list to:
Exception: A building or dwelling unit with 2,000 ft2 or less of conditioned floor area (CFA) may satisfy R402.4.1.2 if it:
5 ACH-50 for homes with < 1,500 ft2 of CFA, or
4 ACH-50 for homes with 1,500 – 2,000 ft2 of CFA.)
4.1.4 R403.2.3 Building framing cavities shall not be used as ducts or plenums.
Exception: Returns run exclusively through conditioned space.
4.1.5 R403.5 The building shall be provided with ventilation that meets the requirements of the International Residential Code (IRC) or International Mechanical Code (IMC), as applicable, or with other approved means of ventilation. Outdoor air intakes shall have automatic or gravity dampers that close when the ventilation system is not operating. Required ventilation rates shall also include adequate provisions for fuel-fired appliance, stove and fireplace makeup air supply; kitchen, bath, clothes dryer, and central vacuum exhausts; and other makeup air system supplies and/or exhausts as required in either the IRC or IMC.