Page 519 - 2018_IRC

ENERGY EFFICIENCY

2. Existing ceiling, wall or floor cavities exposed SECTION N1110 (R504)
during construction provided that these cavities REPAIRS
are filled with insulation. N1110.1 (R504.1) General. Buildings, structures and parts
3. Construction where the existing roof, wall or thereof shall be repaired in compliance with Section N1107.3
floor cavity is not exposed. and this section. Work on nondamaged components neces-
sary for the required repair of damaged components shall be
4. Roof recover.
considered to be part of the repair and shall not be subject to
5. Roofs without insulation in the cavity and where the requirements for alterations in this chapter. Routine
the sheathing or insulation is exposed during maintenance required by Section N1107.3, ordinary repairs
reroofing shall be insulated either above or below exempt from permit, and abatement of wear due to normal
the sheathing. service conditions shall not be subject to the requirements for
6. Surface-applied window film installed on exist- repairs in this section.
ing single-pane fenestration assemblies to reduce N1110.2 (R504.2) Application. For the purposes of this
solar heat gain provided that the code does not code, the following shall be considered to be repairs:
require the glazing or fenestration assembly to be 1. Glass-only replacements in an existing sash and frame.
replaced. 2. Roof repairs.
N1109.1.1.1 (R503.1.1.1) Replacement fenestration.
Where some or all of an existing fenestration unit is 3. Repairs where only the bulb, ballast or both within the
replaced with a new fenestration product, including existing luminaires in a space are replaced provided
sash and glazing, the replacement fenestration unit shall that the replacement does not increase the installed
meet the applicable requirements for U-factor and interior lighting power.
SHGC as specified in Table N1102.1.2. Where more
than one replacement fenestration unit is to be
installed, an area-weighted average of the U-factor, SECTION N1111 (R505)
SHGC or both of all replacement fenestration units CHANGE OF OCCUPANCY OR USE
shall be an alternative that can be used to show compli- N1111.1 (R505.1) General. Spaces undergoing a change in
ance. occupancy that would result in an increase in demand for
N1109.1.2 (R503.1.2) Heating and cooling systems. either fossil fuel or electrical energy shall comply with this
New heating, cooling and duct systems that are part of the chapter.
alteration shall comply with Section N1103. N1111.2 (R505.2) General. Any space that is converted to a
Exception: Where ducts from an existing heating and dwelling unit or portion thereof from another use or occu-
cooling system are extended, duct systems with less pancy shall comply with this chapter.
than 40 linear feet (12.19 m) in unconditioned spaces Exception: Where the simulated performance option in
shall not be required to be tested in accordance with Section N1105 is used to comply with this section, the
Section N1103.3.3. annual energy cost of the proposed design is permitted to
N1109.1.3 (R503.1.3) Service hot water systems. New be 110 percent of the annual energy cost allowed by Sec-
tion N1105.3.
service hot water systems that are part of the alteration
shall comply with Section N1103.5.
N1109.1.4 (R503.1.4) Lighting. New lighting systems
that are part of the alteration shall comply with Section
N1104.1.
Exception: Alterations that replace less than 50 percent
of the luminaires in a space, provided that such alter-
ations do not increase the installed interior lighting
power.
N1109.2 (R503.2) Change in space conditioning. Any non-
conditioned or low energy space that is altered to become
conditioned space shall be required to be brought into full
compliance with this chapter.
Exception: Where the simulated performance option in
Section N1105 is used to comply with this section, the
annual energy cost of the proposed design is permitted to
be 110 percent of the annual energy cost otherwise
allowed by Section N1105.3.

494 2018 INTERNATIONAL RESIDENTIAL CODE ®
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