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^ , . . MANDATORY REQUIREMENTS - (Continued) R403.5.5 Heat traps(Mandatory). Storage water heaters not equipped with integral heat traps and having vertical pipe�� u heat traps installed on both the inlets and outlets. External heat traps shall consist of either a commercially available heat trap or a downward and upward bend ofoo least o16 Inches(8emn)in the hot water distribution line and cold water line located ao close oopossible m the storage tank. nwOus.n Water heater efficiencies(Mandatun0. �7 Rnom.5.6.1.1 Automatic controls. Service water-heating systems shall bo equipped with automatic temperature controls capable of adjustment from the lowest tv the highest acceptable temperature settings for the intended use.The minimum temperature setting range shall bo from 1oo^F,o1*n^F(3o^otonn^[). �l n400.5.a1.0 Shut down. A separate switch or a clearly marked circuit breaker shall be provided to permit the power supplied to electric service systems oobo turned off.A separate valve shallb provided to permit the energy supplied to the main bume,(s)uf combustion types of service water-heating systems mbe turned off. n4no.5.n.o Water-heating equipment. Water-heating equipment installed in residential units shall meet the minimum efficiencies of Table C404.2 in Chapter 4 of the Florida Building Code,Energy Conservation,Commercial Provisions,for the type of equipment installed. Equipment used to provide heating functions as part of a combination system shall satisfy all stated requirements for the appropriate water-heating category.Solar water heaters shall meet the criteria of Section R403.5.6.2.1. �l �000.s.s.u.1 Solar woaapheuuinQsystems. Solar systems for domemiohmw�o,pmdu�ionamnnodby the annual Solar eno�y factor of the system.The solar energy factor of a system shall be determined from the Florida Solar Energy Center Directory of Certified Solar Systems.Solar collectors shall be tested in accordance with ISO Standard 9806,TestMethods for Solar Collectors, and SRCC Standard TM-1,Solar Domestic Hot Water System and Component Test Protocol.Collectors in installed solar water-heating systems should meet the following criteria: 1. Be installed with a tilt angle between 10 degrees and 40 degrees of the horizontal;and o. oo installed atom orientation within 45 degrees vf true south. �l R4o3.s Mechanical ve,�Uwbnn<Mand�on0. The building uh�ibopmv�edmi�venV|aUon that moomthe e,qu|mmenm'�the Florida Building Code,Residential,or Florida Building Code,Mechanical,as applicable,or with other approved means ofventilation including:Natural,Infiltration or Mechanical means.Outdoor air intakes and exhausts shall have automatic or gravity dampers that close when the ventilation system/v not operating. �� R«ou.s.1vvho|o'xoume mechanical xend|atipney�emfan effiouc� \mhaninmu||edm�nminnoaa whole-house mechanical �� ventilation system,fans shall meet the efficacy requirements of Table R*nos1. Exception: Where whole-house mechanical ventilation fans are integral to tested and listed HVAC equipment,they shall be powered byon electronically commutated motor. n«oo.n.r Ventilation air. Residential buildings designed tvbe operated at a positive indoor pressure m for mechanical ventilation shall meet the following criteria: 1. The design air change per hour minimums for residential buildings in ASHRAE 62.2,Ventilation for Acceptable Indoor Air Quality,shall be the maximum rates allowed for residential applications. 2. No ventilation or air-conditioning system make-up air shall be provided to conditioned space from attics, crawlspaces,attached enclosed garages or outdoor spaces adjacent to swimming pools or spas. 3, If ventilation air is drawn from enclosed space(s),then the walls of the space(s)from which air is drawn shall be insulated mo minimum ofR-1 I and the ceiling shall bo insulated uao minimum n,R'1u.space permitting,mR'10 otherwise. nuuo./Heating and cooling equipment VNmnummr0' �7 o4n3.r.1 Equipment sizing. Heating and cooling equipment shall be sized in accordance with ACCA Manual S based on the equipment loads calculated in accordance with ACCA Manual J or other approved heating and cooling calculation methodologies, based onbuikbn loads for the directional orientationn/the building.The manufacturer and model number of the outdoor and indoor units(if split system)shall be submitted along with the sensible and total cooling capacities at the design conditions described in Section R302.1.This Code does not allow designer safety factors,provisions for future expansion or other factors that affect equipment sizing.System sizing calculations shall not include loads created by local intermittent mechanical ventilation such as standard kitchen and bathroom exhaust systems.Now or replacement heating and cooling equipment shall have an efficiency rating equal to or greater than the minimum required by federal law for the geographic location where the equipment is installed, TABLER403.0.1 WHOLE-HOUSE MECHANICAL VENTILATION SYSTEM FAN EFFICACY FAN LOCATION AIRFLOW RATE MINIMUM MINIMUM EFFICACy a AIRFLOW RATE MAXIMU Range hoods Any 2.8 cfm/watt Any In-line fan Any 2.8 cfm/watt Any Bathroom,utility room 90 2.8 cfm/watt Any — For 0:1 chn~oo.3Umin. a When tested in accordance with HV|Standard 910 11/7/201811:31oM snmQyoauVemUaA 'FBCmh Edition(2o17) Compliant Software Page uof5