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3653 Pinecrest Ct - IFGC Appendix E, Worksheet E-1e9/01/2e10 17:34 3.52994739 ANDER$ON AIR INC. • fC5j fr 4 • • REVISOR 13466012 1346.6012 IFGC APPENDIX E, WORKSHEET E-1. IFGC Appendix E. Worksheet E-I Residential Combustion Air Calculation Method (for Furnace Boiler, andior Water Heater in the Same Space) Step 1; Complete vented combustion appliance information, Furnace/Boiler X Draft Hood Fan Assisted (Not fan assisted) & 'Power Vent Water Heater: Draft Hood (Not fan assisted) Fan Assisted Direct Vent input: & Power Vent .1.3tujhr Step 2: Calculate the volume of the Combustion Appliance Space (CAS) containing combustion appliances. The CAS includes all .spaces connected to one another by code compliant openings, Step 3: Determine Air Changes per Hour (ACH) Default ACFI values have been incorporated into Table E-1 for use with Method 4b (KAIR Method), If the year of construction or AC}- is not known, use method 4a (Standard Method). Step 4: Determine .Recuired Volume Combustion .Air. 4a. Standard Method Total Btu/hr input of all combustion appliances (DO NOT COUNT DIRECT VENT APPLIANCES) Use Standard Method column in Table E-1 to find Total Rzquired Volume (TRV) Direct Vent Input; OA P_ BtuflIr CAS volurne:_pl_ Input. /5 0 Btu/hr TRV: -.C" ft' If CAS ... Volume (f)nn Step 2) is greater than TRV then no outdoor openings are needed, If CAS Volume (&om Seep 2) is lesS than TRV then go to STEP 5. 4b. Known Air Infiltration Rate (KA1R) Method Copyright ©2009 b th kcyitgr o(St.outc State nr Minncsota. Al! RigEts PAGE 01 .5 3 -3 a9/01.,..'201'a 17:3. 9529947939 ANDERSON AIR INC. REVISOR 1346.6012 Total Btuihr input of all far-assisted and power vent appliances (DO NOT COUNT DIRECT VENT APPLIANCES) Input: _ Btu/hr Use Fan-Assisted Appliances column in Table E-1 to find Required Volume Fan Assisted (RVFA) RVFA: Total Btu/hr input of all non-fan-assisted appliances Input: Btu/hr Use Non-Fan-Assisted Appliances column in Table E-1 to find Required Volume Non-Fan-Assisted (RN./NFA) RVNFA: Iota! Required Volume (TRV) RVFA + RVNFA RV = ft' If CAS Volume (from Step 2) is greater than TRV then no outdoor openings are needed, If CAS Volume (from Step 2) is less than TRV then go to STEP 5. Step 5: Calculate the ratio of available interior volume to the total required volume. Ratio = CAS Volume (from Step 2) divided by TRV (from Step 4a or Step 4b) Ratio - 0 Step 6: Calculate Reduction Factor (RF). RF = 1 minus Ratio RF -1 - .01a, Step 7: Calculate single outdoor opening as dal, combustion air is from outside. 'Total Btu/hr input of all Combustion Appliances in the same CAS (EXCEPT DIRECT VENT) Combustion Air Opening Area (CAOA): Total Btu/hr divided by 3000 F3tu/hz: per in e c es-i- 4 Copyrigt '2009 , !^y the Rcvisor orStur es, Stray of Minnesota. All Rights Reserveci, Input: 151 Btu/hr CAOA 15 1 221° . /3000 Btu/hr per in' Step 8: Calculate Minimum CAOA, Mmixnum CAOA CAOA multiplied by RF Minimum CAOA = 0 O x , 988 - _ I-0 PAGE 03 -4 in/01/2013 17:34 9528947939 3 REVISOR Step 9; calcl.ilate Combustion Air Opening Diameter (CAOD) CAOD - 1,13 multiplied by the square root ofMinimum CAOA CAQt) - 1.13 Minitnum CAOA if desired, ACM can be determined using ASHRAE calculation or blower door test, Follow procedures in Section G304. Statutory Authority; AIS s 32511.101: 326B.106, 3261313 History: 34 SR 537 Posted: October 23, 2009 Copyright Vo-C AicEves ANDERSON AIR INC. the Revl.est of St/autos, Siam cfMirncr., 41! kight$ Rescrve0, PAGE 02 1346.60i2