Laserfiche WebLink
PAGE 3 OF 3 <br /> Exhaust�Jentilation (302 VIA(. Source Specific Ventilation (spot fans)sh� �e provided for each dwelling <br /> as follows: Exhaust fans providing source specific ventilation shall have a minimum fan flow rating of not less <br /> than 50 CFM at .25 irches water gauge tor batfirooms, laundry or similar rooms, and 100 CFM at .10 wg.tor <br /> kitchens (most range hood fans meet this requirement). 'See Approved Fan List' <br /> Whole house Ventilation Systems (302.2.2 VIA�): Each dwelling unit shall be equipped with a whole <br /> house ventilation system which shail be capable of providing at least 0.35 air changes per hour, but not less <br /> than 75 cubic feet per minute. Wlioie house ventilation systems shall be designed to limit ventilation to a level <br /> no greater than 0.5 air changes per hour under normal operation conditions. W hole house ventilation <br /> systems shall supply outdoor air inlets, forced•air heating system, ducting or equivalent means. Doors and <br /> operabie lites in windows are deemed not to meet ihe outdoor air supply intake requirements. Whole house <br /> fan must meet max. 1.5 sone rating unless fan is mounted at least 4 Ft. above the ceiling. Required spot <br /> fan(s)may be designated,as whole house fan if it meets all requirements for the whole house fan, and <br /> doors are undercut(or other approved means)for air distribution. <br /> Source of Whole House Ventilation: (choose one) q <br /> 0 f <br /> Option #1 W hole house exhaust fan. <br /> Whole house Exhaust fan Prescriptive Requirements (Table 3-2 VIAQ) <br /> Location � � Manuf:&Modei �? `� ;tt%,�����-= Sone Ratirg — <br /> \ � .� -. - - 1.5 max: <br /> 1.5 max. - <br /> (Smaller CFM is allowed (or whoie house(an set up (or continuous operation: Kitchen =25 CFM, <br /> bath our laundry=20 CFM. Fan must be rated(or continuous operaticn). <br /> � Option#2 Integrated Forced Air Furnace. <br /> All ventilation systems must have readily accessible conirols with the exception of continuously operating <br /> systems. Source-specitic fans must have eilher a manual switch, dehumidistat, or a crank timer. <br /> Intermiflently operatiny whole house ventilation systems must have both a manual control and an automatic <br /> control (such as a clock timer). When timers are used Ihey must be set tor a minimum daily run time of 8 I <br /> hours. <br /> � Option #3 Supply tan ventilatior�. <br /> Th�s method provides fresh air to all habitable spaces through the use of a dedicated supply fan.This system <br /> can be i�istalled ir�conjunction with a forced air heating system, or as a stand alone supply air system. In both <br /> cases, duct runs are required to each habitable room. <br /> ❑ Option #4 Heat Recovery Ventilation System. <br /> Exhaust Ducts shail be sized and installed according to Table 3-3 VIAQ, have a back draft damper, and be <br /> insulated to R-4 if run in an unheated space. Ducts must terminate oufside the building and 3 teet from <br /> openings into the building. <br /> Select method of supplying fresh air(VIAQ)302.6.2): <br /> pIndividual Ronm Outdoor Air Inlets: Screened,controllable, ventilating windows or through-wall <br /> ports to the exterior(capable of providing a min. of 4 sq. inches in all habitable rooms). <br /> � Integrated Forced Air Furnace: Fu�,nace which delivers outside air through the ducting system. <br /> System Shall be installed and tested according to the provisions o( Sec. 302.6.3&303.12 VIAQ. <br /> The installing contractor shall test arid adjust system, and submit certification of compliance to <br /> lhis department prior to the tinal insoection. <br /> � Heat Recovery Ventilation System: Air to air heat exchangers are required to have min. 6"duct, <br /> balancing dampers un inlet and exhaust ducts, flow grids instalied on both supply and return ducts. <br /> Syslem minimum flow rating shall be not less Ihan that specified in Table 3-2 WSEC. <br /> 3/N <br />