2012, 11-27 Permit: BLD-2012-1085 Duct Leakage Affidavit R
.i,, - -, `�VISHINGTON STATE UNIVERSITY
.iJ 'I Y, 10 EXTENSION ENERGY PROCItAM
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Duct Leakage Affidavit
Permit#: // �� /
House address or lot number: / l`, C% 0( Id 1/k 11 A kv CL
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City: p L k/AA didy Zip:
(circle one): Plans Estimated Measured
Cond. Floor Area(ft2): ,D(), (e � Source
❑ Duct tightness testing is not required for this residence per exceptions listed at the end of this document
Air Handler in conditioned space? ( no Air Handler present during test? El yes firr
Circle Test Method: Leakage to Outside Total Leakage
Maximum duct leakage:
Post Construction,total duct leakage:(floor area x .08)= CFM@25 Pa
Post Construction, leakage to outdoors: (floor area x.06)= CFM@25 Pa
Rough-In,total duct leakage with air handler installed:(floor area x .06)_ 1 2 V CFM@25 Pa
Rough-In,total duct leakage with air handler not installed: (floor area x.04)= CFM@25 Pa
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Test Result: O 2 CFM@25Pa I
Ring(circle one if applicable): Open1 —(2c ) 3
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Duct Tester Location: Tha���2T0 ak., Pressure Tap Location: Kt#Ckrit S.Lt r V
I certify that these duct leakage rates are accurate and determined using/� R r Q ww 1n,
standard duct testing protocol.
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Company Name: '�Oa�.b�.w�,�yy L�t lel_ Technician: L1i1-
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Technician Signature:t Date: l t,'-?-7'7 61 Z Phone Number sU y Zalv 0 3 ii
Washington State Energy Code reference:
503.10.3 Sealing.All ducts,air handlers,filter boxes,and building cavities used as ducts shall be sealed.Joints and seams shall comply
with Section M1601.3 of the International Residential Code or 603.9 of the International Mechanical Code. Duct tightness testing shall be
conducted to verify that the ducts are sealed.A signed affidavit documenting the test results shall be provided to the jurisdiction having
authority by the testing agent.When required by the building official,the test shall be conducted in the presence of department staff.
Exceptions: 1.Duct tightness test is not required if the air handler and all ducts are located within conditioned space.
2.Duct testing is not required if the furnace is a nondired vent type combustion appliance installed in an unconditioned space.
A maximum of six feet of connected ductwork in the unconditioned space is allowed.All additional supply and return ducts
shall be within the conditioned space.Ducts outside the conditioned space shall be sealed with a mastic type duct sealant and
insulated on the exterior with R-8 insulation for above grade ducts and R-5 water resistant insulation when within a slab or
earth.
INTEGRATED WHOLE HOUSE VENTILATION SYSTEM (WSV IAQC SECTION 303.4.2.1)
WORKSHEET FOR REQUIRED FRESH AIR COMBUSTION AIR
JOB ADDRESS: (9. ‘
FURNACE MODEL NUMBER: N 9 m6-1,8Dep® /T/
FURNACE BRAND NAME: /A/ / f j /G �I/ BTU INPUT: lDD
WATER HEATER BRAND NAME:,�j / "h>h,i BTU INPUT: .4/11
VENTILATION RATE DETERMINATION
Floor area(total sq.ft.)of residence(basement, 1st,2nd,3rd floors&bonus room = O�i%Cf.
Number of bedrooms in the residence: _
Using TABLE 3-2 on the back of this form,determine: /5
Minimum ventilation air =
Maximum ventilation air = /0Z 5r
/_ FORMULA FOR COMBUSTION AIR
/'
(1) For Fan Assist Vented Furnace 42 MBTU input x.4 CFM/BTU = J^ /. (2 CFM
(2)Power Vented Water Heater(Use 90CFM if Rating Unknown) = CFM
(3)For Draft Hood Appliances 7 MBTU input x.8 CFM/BTU = � CFM
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TOTAL CFM REQUIRED FOR COMBUSTION AIR....ADD 1 +2+3 = CFM
The ventilation/combustion air duct must provide adequiate compustion air or outside combustion air must be provided separately
from the ventilation air. (Outside combustion air may be provided with one(1)duct in the upper 12 inches of the enclosure sized
at one(1)square inch per 3,000 BTH/hr input of all the appliances in the enclosure.)
Use TABLE 3-5 on the back of this form to determing ventilation/compustion air duct size.
SIZE OF OPENINGS IN WALL OF APPLIANCE ENCLOSURE(IF CONFINED SPACE-LESS THAN 50 CU FT PER 1000 BTU INPUT)PER
U.M.C.AND INWHVAC ASSOC.STANDARDS BOOK(1 SQ IN PER 1000 BTU INPUT OF ALL APPLIANCES IN THE ENCLOSURE)=
SQ IN(NET FREE AREA). (NET FREE AREA=65%FOR METAL LOUVER; 25%FOR WOOD LOUVERS)
VERIFICATION OF PROPER DRAFTING OF APPLIANCES WITH ALL EXHAUST FANS, INCLUDING DRYER IF INSTALLED...
OPERATING: YES NO
4VERIFIED BY: i LICENSE#: /2,L/, 7/
COMPANY NA AIR DESIGN HEATING&AIR CONDITIONING
LEAVE A COPY OF THIS FORM ON THE JOB SITE AT OR ON THE FURNACE!
Journeyman:
Gas License: Electrical License:
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TABLE 3-2
VENTILATION RATES FOR ALL GROUP R OCCUPANCIES FOUR STORIES LESS*
Minimum Maximum Ventilation Rates:Cubic Feet Per Minute(CFM)
Floor Area 2 or Less 3 4 5 6 7 8
(SQ FT) Min. Max Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
Less than 500 50 75 65 98 80 120 95 143 110 165 125 188 140 210
501-1000 55 83 70 105 85 128 100 150 115 173 130 195_145 218
1001-1500 60 90 75 113 90 135 105 158 120 180 135 203 150 225
1501-2000 65 98 80 120 95 143 110 165 125 188 140 210 155 233
2001-2500 70 105 85 128 100 150 115 173 130 195 145 218 160 240
2501-3000 75 113 90 135 105 158 120 180 135 203 150 225 165 248
3001-3500 80 120 95 143 110 165 125 188 140 210 155 233 170 255
3501-4000 85 128 100 150 115 173 130 195 145 218 160 240 175 263
4001-5000 95 143 110 165 125 188 140 210 155 233 170 255 185 278
5001-6000 105 158 _ 120 180_ 135 203 150 225 165 248 180 270 195 293
6001-7000 115 173 130 195 145 218 160 240 175 263 190 285 205 308
7001-8000 125 188 140 210 155 233 170 255 185 278 200 300 215 323
8001-9000 135 203 150 225 165 248 180 270 195 293 210 315 225 338
Over 9000 145 218 160 240 175 263 190 285 205 308 220 330 235 353
For residences that exceed 8 bedrooms, increase the minimum requirement listed for 8 bedrooms by an additional 15 CFM per bedroom.
The maximum CFM is equal to 1.5 timese the minimum.
TABLE 3-5
PRESCRIPTIVE INTEGRATED FORCED AIR SUPPLY DUCT SIZING
Required Flow(CFM) Minimum Smooth I Minimum Flex Max.Length*IMax.Elbows** 1
Per Table 3-2 Duct Diameter Duct Diameter (Feet)*
50-80 6" 7" 20' 3
80-125 7" 8" 20' 3
I 115-175 8" 10" 20' 3
170-240 9" 11" 20' 3
* For lengths over 20 feet increase the duct diameter 1-inch.
** For elbows numbering more than 3, increase the duct diameter 1-inch.
Insulate the ventilation/combustion air duct withing the conditioned space to a minimum of R-4.
TABLE 3-3
PRESCRIPTIVE EXHAUST DUCT SIZING
Fan Tested CFM Min. Flex Maximum Length Min.Smooth Max. Length Maximum
at 0.25"W.C. Diameter Feet Diameter Feet Elbows*
50 4 inch 25 4 inch 70 3
50 5 inch _ 90 _ 5 inch 100 3
50 6 inch NO LMIT 6 inch NO LIMIT 3 -
80 4 inch** NA 4 inch 20 3
80 5 inch 15 5 inch 100 3
80 6 inch 90 6 inch NO LIMIT 3
100 5 inch** _ NA 5 inch 50 3
100 6 inch 45 6 inch — NO LIMIT 3
125 6inch _ 15 6 inch NO LIMIT 3 —
125 7 inch 70 7 inch NO LIMIT 3
* For each additional elbow,subtract 10 feet from length.
** Flex ducts of this diameter are not permitted with fans of this size.