HomeMy WebLinkAbout403 S WHITCOMB PUD - FINAL - 86-88 - CORRESPONDENCE - LUC REQUIREMENTS•
December 30, 1988
Mr. Felix Lee
Building Inspector
CITY OF FORT COLLINS
Box 580
Fort Collins, CO 80522
GEFROH HATTMIAN INC.
ARCHITECTS/PLANNERS
CONSTRUCTION �v1ANAGEMENT
135 West Swallow Road
Fort Collins, CO 80525
(303) 223-7335
RE: ENERGY CODE COMPLIANCE FOR 22X24 ADDITION TO 403 SOUTH WHITCOMB
Dear Mr. Lee:
The following information reviews this structure for compliance to the
model energy code with the intent of claiming points on the Business
Service Point Chart required of the applicant by the Planning Department.
The building is wood frame 24.0 X 22.0 totaling 528 square feet. We are
requesting six out of a possible eight points on the point chart in ques-
tion or 75 of the amount available.
To achieve these six points we contend that the design of this building,
being more thermally efficient, will reduce the consumption of none re-
newable fossil -type fuel, thus warranting the point chart consideration.
The following summary demonstrates an average savings of 60% over the
energy a build that complies with the model energy code consumes through
a normal heating cycle. This building is not air-conditioned.
Respectfully,
GEFROH
redric/J. Hattman
Vice President
kam
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s MODEL ENERGY CODE COMPLIANCE
403 SOUTH WHITCOMB
BUILDING ENVELOPE
Building Footprint 528 Sq. Ft.
Building Dimensions 24.0 Ft. X 22.0 Ft.
Floor to Ceiling Height of
Heated Space 12 Ft.
Temperature Differential 72° F.
Heating Season 6600 Degree Days
CODE COMPLIANT - Base Data for This Bu i 1 d i ng,: ,-
Table Values of Surface Aggregate tt
WaIIs
U = 0.26
Roof/Ceiling
% Uo = 0.07
Slab
R = 5.4 j
BASE CRITERIA
U Wall X Area Wall +
U Roof X Area Roof
Building Uo =
o
0
SURFACE
AREA
=
0.26 X 1104 + 0.07 X
528
1632
0.198 -
SPECIFIC BUILDING -
Envelope Value -
Wall
Cedar Siding
R =
.8100
Insualted Sheathing
R =
2.5000
Batt Insulation
R =
13.0000
Wood Studs 24 o/c
R =
'4.3750
Gypsum Board 5/8"
R =
.5625
Door Metal Insulated
R =
2.1300
Door Overhead
R =
5.2600
Assume 10%
of Wall
is Solid Wood Framing
R =
8.2400
Assume 90%
of Wall
is Filled With Insulation
R =
16.8700
Glass -Wood
Frame and 5/8" Insulation Glass
UG=
.4900
Wall
Surfaces
-- Glass 30 Sq. Ft.
Glass
Wall 96 Sq. Ft.
Solid Wall
Wall 867 Sq. Ft.
Void Wall
Door 21 Sq. Ft.
Door
Door 90 Sq. Ft.
Overhead Door
Wall Uo =
UG X
Glass Area & USW X Solid
Wall Area + UVW X
Void
Wall Area + UD X
Area
Door + UD X Area Door
SURFACE AREA �—� 41
0.49 X 30 + 0.12 X 96 + 0.059 08 67 +` 0.19 90 + 0.46 X 21
110
14.7 + 11.52 + 51.153 + 17.1 + 9.66 _ 104.133
110 110
0
•
MODEL ENERGY CODE COMPLIANCE
403 SOUTH WHITCOMB
Page 2
Roof/Ceiling
Assume 10% of Roof is Framing
Assume 90% of Roof Space is Void
1/2'' Gypsum Board
Truss
Minimum Insulation Over
Truss
Insulation
Uo Roof = UR Area Truss + UR X Area of Insulation
ROOF AREA
0.42 X 53 + .032 X 475
52
('.033
Overall Envelope-U Values = UW X AW + UR X A
SURFACE AREA
Base Data
= 0.94 X 1104 + .033 X 528
1632
Uo = 0.075
uo = 0.198
ENERGY CONSUMPTION - At design differential
Base Data AS X Uo X At = BTUH
1632 X 0.198 X 72 = 23266 BTUH
Building as Designed AS X Uo X At = BTUH
1632 X 0.075 X 72 = 8813 3TUH
Hourly Savings at Design Temperature
Design = 8813 BTUH Base 232 BTUH =.37 Savings = 63%
ENERGY CONSUMPTION - Seasonal
Base Data AS X Uo X.DD = MBTU/Season
1632 X 0.198 X 6600 = 2.133 MBTU/Season
Building as designed AS X Uo X DO = MBTU/Season
1632 X 0.075 X 6600 = 808 MBTU/Season
Seasonal Savings Design = 808 MBTU = 38%
se Ba2..133 MBTU
R = .450
R = 4.375
R = 19.000
R = 30.000
R = 23.825
R = 30.450
Percent of Fuel Savings 62% Per Season