2428 STATE ST 2019-04-17 - Laserfiche WebLink

INTERNATIONAL RESIDENTIAL CODE M1507.3.1 System design.The whole-house ventilation - MECHANICAL VENTILATION AS REQUIRED system shall consist of one or more supply or exhaust fans, BY IOWA 2012 IECC SECTION 403.5 or a combination of such,and associated ducts and controls. Scope of Work: Local exhaust or supply fans are permitted to serve as such a DEFINITIONS system.Outdoor air ducts connected to the return side of an air handler shall be considered to provide supply ventilation. LOCAL EXHAUST.An exhaust system that uses one or Build non load bearing walls for upstairs bathroom#2 and Master Bathroom#1 and walk in closet more fans to exhaust air from a specific room or rooms M1507.3.2 System controls.The whole-house mechanical within a dwelling. ventilation system shall be provided with controls that (framing diagram with nail schedule attached) enable manual override. WHOLE HOUSE MECHANICAL VENTILATION New bathroom fixtures in both bathrooms SYSTEM.An exhaust system,supply system,or M1507.33 Mechanical ventilation rate.The whole house mechanical ventilation system shall provide outdoor air ata New cabinets and Kitchen combination thereof that is designed to mechanically fixtures/appliances exchange indoor air with outdoor air when operating continuous rate of not less than that determined in continuously or through a programmed intermittent schedule accordance with Table M1507.3.3(1). Electrical Panel to be replaced and new wiring to be installed where new walls are built to satisfy the whole house ventilation rates. Exception: The whole-house mechanical ventilation system SECTION M1507 is permitted to operate intermittently where the system has New plumbing in bathrooms and kitchen MECHANICAL VENTILATION controls that enable operation for not less than 25-percent of each 4-hour segment and the ventilation rate prescribed in Handrails where required per WAC 246-359-520(3) M1507.1 General.Where local exhaust or whole-house Table M1507.3.3(1)is multiplied by the factor determined in mechanical ventilation is provided,the equipment shall be accordance with Table M1507.3.3(2). Hard wired smoke/Co2 detectors per R314.2.2 and in basement per R314.3 designed in accordance with this section. M1507.4 Local exhaust rates.Local exhaust systems shall M1507.2 Recirculation of air.Exhaust air from bathrooms be designed to have the capacity to exhaust the minimum air Install 150 CFM whole house fan per M1507.3.3(1) &M1507.3.3(2) ((attachment included)) and toilet rooms shall not be recirculated within a residence flow rate determined in accordance with Table M 1507.4. or to another dwelling unit and shall be exhausted directly to Install 50 CFM exhaust Fans each in laundry room and upstairs bathroom#2 and Master Bathroom#1 the outdoors.Exhaust air from bathrooms and toilet rooms TABLE M1507.4 MINIMUM REQUIRED LOCAL EXHAUST RATES FOR shall not discharge into an attic,crawl space or other areas ONE-AND TWO-FAMILY DWELLINGS inside the building. AREA TO BE EXHAUSTED EXHAUST RATES Kitchens 100 cfm intermittent or 25 cfm M1507.3 Whole-house mechanical ventilation system. continuous Mechanical exhaust capacity of 50 cfm Whole-house mechanical ventilation systems shall be Bathrooms—Toilet Rooms intermittent or 20 cfm continuous Response Letter for application: designed in accordance with Sections M1507.3.1 through For SI: I cubic foot per minute=0.4719 L's. M1507.3.3. Item 1—see plan Headings TABLE M1507.3.3(1) Item 2-See attachments to plans CONTINUOUS WHOLE-HOUSE MECHANICAL VENTILATION SYSTEM AIRFLOW RATE REQUIREMENTS NUMBER OF BEDROOMS DWELLING UNIT Item 3-See upstairs bathroom#2 dimensions and refer to plan set to see that bedroom#3 & Bedroom FLOOR AREA 0-1 2-3 4-5 6-7 >7 (square feet) Airflow in CFM #4 width of MIN 7 feet is met. <1500 30 45 60 75 90 45 60Illi 90 105 Item 4—See FLOOR#1& FLOOR#2 3001-4500 60 75 90 105 120 Item 5-Window determined to be existing in master Bedroom#1; NO change needed 4501-6000 75 90 105 120 135 6001-7500 90 105 120 135 150 Item 6—See FLOOR#1& FLOOR#2 that each window is dimensioned and existing >7500 105 120 135 150 165 Item 7-Attached site plan is accurate. 1/4 scale drawing is accurate to site plan. TABLE M1507.3.3(2) INTERMITTENT WHOLE-HOUSE MECHANICAL VENTILATION RATE FACTORSa'b RUN-TIME PERCENTAGE IN 25% 33% 50% 66% 75% 100% EACH 4 HOUR SEGMENT _ Factors 4 3 101111 1.5 1.3 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.