7130 HIGHLAND DR 2022-02-14 - Laserfiche WebLink

Z ., City of Sammamish A Residential Energy & Ventilation Complian0orm Page 6_of� Whole House Ventilation (Prescriptive) IRC Sec. M1507.3 Whole -House Ventilation Whole -house mechanical ventilation systems shall be designed in accordance with Sections M1507.3.1 through M1507.3.7. Please check the appropriate box to describe which of the four prescriptive Whole House Ventilation Systems you will be using. Indicate ❑ Continuous or 01ritermittent and provide Run Time % 5 (see Table M1507.3.3(2)) ❑ 1. Whole House Ventilation Using Exhaust Fans & Outdoor Air Inlets or Operable Windows. (M1507.3.4) 2. Whole House Ventilation Integrated with a Forced Air System. (M1507.3.5) ❑ 3. Whole House Ventilation using a Supply Fan. (M1507.3.6) TABLES FOR USE WITH CALCULATING WHOLE HOUSE VENTILATION OPTIONS TABLE M1507.3.3( t CONTINUOUS WHOLE -HOUSE MECHANICAL'vENTILATION SYSTEM AIRFLOW RATE REQUIREMENTS DWELLING UNIT FLOOR AREA (Square fart NURIBER OF IEDROO S 0-1 2-3 4-8 g—q >7 AIrftw In CFM i < 1,500 ' 30 45 60 75 90 1,501— 3,000 45 60 75 90 105 3,001— 4,500 60 75 90 105 120 4,501— 6,(100 75 90 105 120 135 6,001— 7,500 90 105 120 135 150 > 7,500 105 120 135 150 165 For SI: 1 square foot = 0.0929'ne, 1 cubic foot per minute = 0.00047I9 els. TABLE M1507.3 2) INTERMITTENT WHOLE -HOUSE MECHANICAL VENTILATION RATE FACTOWb RUN-TIME PERCENTAGE 1N EACH 444OUR 26% =% W% 66 % 73% 1009E SEGMENT Factoe 4 3 2 1.5 1.3 1 1.0 a. For ventilation system run time values between those ,given, the factors are permitted to be determined by interpolation: , b. Extrapolation beyond the table is prohibited. See modified Tables M1507.3.3(1) implementing intermittent factors shown in Table M1507.3.3(2)—on next page. Supp Fan Tested at 0.40" W.G. Specified Volume from Table M1507.3.3 1 Minimum Smooth Duct Diameter Minimum Flexible Duct Diameter 50 — 90 CFM 4 inch 5 inch 90 -150 CFM 5 inch 6 inch 150 — 250 CFM 6 inch 7 inch 250 — 400 CFM 7 inch 8 inch Source Specific Exhaust Ventilation Required in each kitchen, bathroom, water closet compartment, laundry room, indoor swimming pool, spa and other rooms where water vapor or cooking odor is produced. MINIMUM REQUIRED LOCAL EXHAUST RATES FOR ONE- AND TWO-FAMILY DWELLINGS AREA TO 13E EXHAUSTED I EXHAUST RATES x4e4%pne 100 chn intermittent or 25 cfin cont in- Bathrooms-Toilet Rooms Mechanical exhaust capacity of 50 cfm I intermittent or 20 cfm continuous For Si I cubic foot per minute = 0.0OD4719 rn'A.