The provisions of Section C407 of IECC-CE are adopted by reference with the following modifications:
1. Throughout the body of each provision of this section, reset the singular and plural forms of the following terms in italic type: "air economizers," "energy cost," "proposed design," "service water heating," "standard reference design," and "thermostat."
2. Throughout this section, reset the singular and plural forms of the following terms in non-italic type: "construction document," and "Group R."
3. Revise Section C407.2, item 2 to read:
"An annual energy cost that is less than or equal to 80 percent of the annual energy cost of the standard reference design. Energy prices shall be taken from a reliable source, such as the Department of Energy, Energy Information Administration’s State Energy Data System Prices and Expenditures reports. The building official shall be allowed to require time-of-use pricing in energy cost calculations. The reduction in energy cost of the proposed design associated with on-site renewable energy shall be not more than 5 percent of the total energy cost. The amount of renewable energy purchased from off-site sources shall be the same in the standard reference design and the proposed design."
4. Revise Table C407.2 by inserting a new row under "Envelope" to read:
"C402.4.1.3 | Fenestration – orientation"
5. Revise Section C407.3.2 by replacing "permitted" with "allowed."
6. Revise Table C407.4.1(1) by replacing the following rows to read:
Vertical fenestration other than opaque doors | Area
1. The proposed vertical fenestration area where the proposed vertical fenestration area is less than 40 percent of above-grade wall area.
2. 40 percent of above-grade wall area where the proposed vertical fenestration area is 40 percent or more of the above-grade wall area.
3. Fenestration orientation shall comply with Section C402.4.1.3. |
As proposed |
U-factor: as specified in Table C402.4 | As proposed | |
1. SHGC: as specified in Table C402.4
2. Fenestration SHGC shall comply with Section C402.4.1.3. |
As proposed | |
External shading and PF: none | As proposed | |
Skylights | Area
1. The proposed skylight fenestration area; where the proposed skylight fenestration area is less than that allowed by Section C402.1.
2. The area allowed by Section C402.1; where the proposed skylight fenestration area exceeds that allowed by Section C402.1. |
As proposed |
U-factor: as specified in Table C402.4 | As proposed | |
SHGC: as specified in Table C402.4 | As proposed |
7. Revise Table C407.4.1(3), footnote e by replacing "permits" with "allows."
8. Revise Section C407.4.2.2 by replacing "permitted" with "allowed."
9. Revise Section C407.4.2.3 by replacing "permitted" with "allowed."
10. Revise Section C407.5 by deleting "approved."
11. Revise Section C407.5.1 to read:
"Performance analysis tools complying with the applicable subsections of Section C407 and tested according to ASHRAE Standard 140 shall be accepted."
12. Revise Section C407.5.2 by replacing "an approved" with "a reliable."