Report ELI
ENERGY EFFICIENCY E .: .'
OCT 2 4 2018
TABLE N1101.3 CITY OFT€1uti4i transmitted to or from the exterior or to or from 1
SMALL ADDITION ADDITIONAL MEASURES(Sa t 1Nf fly �ypned spaces.
!. i Increase the ceiling insulation of the existing portion of C Thermal Conductance .See"Thermal conductance."
1 I the home as specified in Table N1101.2.
( )
CONDITIONED SPACE.A space within the building,sep-
t Replace all existing single-pane wood or aluminum win arated from unconditioned space by the exterior envelope,
dews to the U-factor as specified in Table Nl101.2
which by introduction of conditioned air, by heated and/or
Insulate the floor system as specified in Table N1101.2& cooled surfaces,or by air or heat transfer from directly condi-
install 100 percent of permanently installed lighting fix- tinned spaces is maintained at temperatures of 55°F(1.3°C)or
tures as CFL,LED,or linear fluorescent or a min.efficacy higher for heating and/or 85°F(29.4°C) or below for cooling.
of 40 lumens per watt as specified in Section NI 107.2• (Enclosed corridors between conditioned spaces shall be con-
n Test the entire dwelling with a blower door and exhibit sidered as conditioned space. Spaces where temperatures fall
no more than 6.0 air changes per hour C 50 Pascals. between this range by virtue of ambient conditions shall not
5 Seal and performance test the duct system, be considered as conditioned space.) C
6 Replace existing 78 percent AFUE or less gas furnace COOLED SPACE. A space within a building provided with
with a 92 percent AFUE or greater system. a mechanical-cooling supply.
7 Replace existing electric radiant space heaters with a ! EXTERIOR DOOR. A permanently installed operable bar-
ductless mini split system with a minimum HSPF of 10.0,I rier by which an entry is closed and opened. Exterior doors
include doors between conditioned and unconditioned spaces,
8 Replace existing electric forced air furnace with an air
source heat pump with a minimum HSPF of 9.5. such as a door between a kitchen and garage.
•iReplace existing water heater with a water heater meet- EXTERIOR ENVELOPE.See"Building envelope."
Ing Conservation Measure D[Table N1101.1(2)1 EXTERIOR WALL. Any member, or group of members,
which defines the exterior boundaries of the conditioned
space and which has a slope of 60 degrees (1.05 rad) or
N1101.4 Information on plans and specifications. Plans greater with the horizontal plane.
and specifications shall show in sufficient detail all pertinent EXTERIOR WINDOW.An opening,especially in the wall
data and features of the building and the equipment and sys of a building, for admission of light or air that is usually
terns as herein governed, including, but not limited to: exte-
rior envelope component materials; R-values of insulating closed by casement or sashes containing transparent material
materials;HVAC equipment efficiency performance and sys (such as glass) and in some cases capableof being opened
tern controls,lighting and other pertinent data to indicate con- and shut. All areas, including frames, in the shell of a condi-
formance with the requirements of this chapter. tinned space that let in natural light,including skylights,slid-
ing glass doors, glass block walls and the glazed portions of
the doors.
SECTION N1102 When calculating the energy performance of the exterior
DEFINITIONS envelope, the area of the window shall be the total area of
AFUE(ANNUM..FUEL UTILIZATION EFFICIENCY). glazing measured using the rough opening dimensions, and
The energy output divided by the energy input,calculated on including the glass,sash and frame.
an annual basis and including part load and cycling effects. FENESTRATION.Windows and doors in the exterior enve-
AFUE ratings shall be determined using the U.S.Department lope. See the definitions for "Exterior door" and "Exterior
of Energy test procedures(10 CFR Part 430). window."
AUTOMATIC.Self-acting,operating by its own mechanism FLOOR AREA. The area included within the surrounding
when actuated by some impersonal influence, such as a exterior walls of a building or portion thereof, exclusive
change in current strength,pressure, temperature or mechani- courts. The floor area of a building or portion thereof, not
cal configuration. (See also`:Manual.") provided with surrounding exterior walls shall be the usable
BASEMENT WALL. The opaque portion of walls which area under the horizontal projection of the roof or floor
encloses a basement and is partially or totally below grade above.
walls. GLAZING. All areas including frames in the shell of a con-
BELOW GRADE WAILS. The walls or the portion of ditioned space that let in natural light, including windows,
walls entirely below the finished grade or which extend 2 feet clerestories, skylights, sliding glass doors, glass block walls
(610 mm)or less above the finished grade. and the glazed portion of doors.
BTU (British Thermal Unit). The amount of heat required GROSS AREA OF EXTERIOR WALLS.Consists of wall.
to raise the temperature of 1 pound(0.454 kg)of water(about areas,as measured on the exterior,including foundation walls
1 pint)from 59°F to 60°F(15°C to 16°C). above grade; peripheral edges of floors; .window areas,
including sash; and door areas, where such surfaces are
BUILDING ENVELOPE.That element of a building which exposed to outdoor air and enclose a heated or mechanically
encloses conditioned spaces through which thermal energy cooled space.
436 2017 OREGON RESIDENTIAL SPECIALTY CODE
`ENERGY EFFICIENCY
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N1101.3 Additions.Additions to existing buildings or struc- N1101.3.2 Small additions. Additions that are less than
tures may be made without making the entire building or 40 percent of the existing building heated floor area or less
structure comply if the new additions comply with the than 600 square feet (55 m2) in area, whicheverrless,
requirements of this chapter. shall be required to select one measure from Table
N1101.3.1 Large additions.Additions that are equal to or N1101.1(2)or comply with Table N1101.3.
more than 40 percent of the existing building heated floor Exception: Additions that are less than 15 percent of
area or 600 square feet(55 m2)in area, whichever is less, existing building heated floor area or 200 square feet
shall be required to comply with Table Ni 101.1(2). (18.58 m2)in area,whichever is less,shall not be required
to comply with Table N1101.1(2)or Table N1101.3.
TABLE N1101.1(1)
PRESCRIPTIVE ENVELOPE REQUIREMENTS'
STANDARD BASE CASE LOG HOMES ONLY
BUILDING COMPONENT
Required Performance Equiv.Value" Required Performance Equiv.Value"
Wall insulation-above grade U-0.059° R-21 Intermediate'. Note d Note d
Wall insulation below grade' C-0.063 R-15/R-21 C-0.063 R-15/R-21
Flat ceilingsf U-0.021 R-49 ' U-0.020 R-49 All
Vaulted ceilingsg U-0.033 R-g h '•t ter or U-0.027 R-38Ah
R-30A Scissor Truss
Underfloors U-0.033 R-31 U-0.033 R-30
Slab edge perimeter F-0.520 R-15 F-0.520 R-15
Heated slab interior' n/a R-10 n/a R-10
Windows' U-0.30 U-0.30 U-0.30 U-0.30
Window area limitation'k n/a n/a n/a n/a
Skylights' U-0.50 U-0.50 U-0.50 U-0.50
Exterior doors' U-0.20 U-0.20 U-0.54 U-0.54
Exterior doors with>2.5 ft2 glazing' U-0.40 U-0.40 U-0.40 U-0.40
Forced air duct insulation n/a R-8 n/a R-8
For SI:1 inch=25.4 mm,1 square foot=0.0929 m2,1 degree=0.0175 rad,n/a=not applicable.
a. As allowed in Section N1104.1,thermal performance of a component may be adjusted provided that overall heat loss does not exceed the total resulting from
conformance to the required U-factor standards.Calculations to document equivalent heat loss shall be performed using the procedure and approved U-factors
contained in Table N1104.1(1).
b.R-values used in this table are nominal for the insulation only in standard wood framed construction and not for the entire assembly.
c. Wall insulation requirements apply to all exterior wood framed,concrete or masonry walls that are above grade.This includes cripple walls and rim joist
areas.Nominal compliance with R-21 insulation and Intermediate Framing(N1104.5.2)with insulated headers.
d.The wall component shall be a minimum solid log or timber wall thickness of 3.5 inches(90 mm).
e. Below-grade wood,concrete or masonry walls include all walls that are below grade and do not include those portions of such wall that extend more than 24
inches(609.6 mm)above grade.R-21 for insulation in framed cavity;R-15 continuous insulation.
Insulation levels for ceilings that have limited attic/rafter depth such as dormers,bay windows or similar architectural features totaling not more than 150
square feet(13.9 m2)in area may be reduced to not less than R-21.When reduced,the cavity shall be filled(except for required ventilation spaces).R-49
insulation installed to minimum 6-inches depth at top plate at exterior of structure to achieve U-factor.
g. Vaulted ceiling surface area exceeding 50 percent of the total heated space floor area shall have a U-factor no greater than U-0.026(equivalent to R-38 rafter
or scissor truss with R-38 advanced framing).
h. A=Advanced frame construction.See Section N1104.6.
i. Heated slab interior applies to concrete slab floors(both on and below grade)that incorporate a radiant heating system within the slab.Insulation shall be
installed underneath the entire slab.
j. Sliding glass doors shall comply with window performance requirements.Windows exempt from testing in accordance with Section NF1111.2,Item 3 shall
comply with window performance requirements if constructed with thermal break aluminum or wood,or vinyl,or fiberglass frames and double-pane glazing
with low-emissivity coatings of 0.10 or less.Buildings designed to incorporate passive solar elements may include glazing with a U-factor greater than 0.35
by using Table N1104.1(1)to demonstrate equivalence to building envelope requirements.
k. Reduced window area may not be used as a trade-off criterion for thermal performance of any component.
Exception:Table N1101.1(2),Envelope Measure 6:calculation allows baseline case 15 percent of total wall area as window when design case utilizes
window area of less than 15 percent.
1. Skylight area installed at 2 percent or less of total heated space floor area shall be deemed to satisfy this requirement with vinyl,wood or thermally broken
aluminum frames and double-pane glazing with low-emissivity coatings.Skylight U-factor is tested in the 20-degree(0.35 rad)overhead plane in accordance
with NFRC standards.
m.A maximum of 28 square feet(2.6 m2)of exterior door area per dwelling unit can have a U-factor of 0.54 or less.
n. Glazing that is either double pane with low-e coating on one surface,or triple pane shall be deemed to comply with this U-0.30 requirement.
434 2017 OREGON RESIDENTIAL SPECIALTY CODE