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. ' . . FORM R405'2O14 0�0 '� �� o��U��U�� /C�[�nU�� -- - — — — O �3.2.3ouilding Cavities(Mandatory).Building framing cavities shall not be used as ducts or plenums' O R403.3Meohunico system piping Insulation(Mondutory). Mechanical system piping capable of carrying fluids above 1os1F(411C) or below erF(13':)shall be insulated ma minimum ofR-o, _ n4uo.3.1 Protection qv piping insulation, 13 R40 .41cxmu|atinghotwatereystems(Mandatory). Circulating hot water systems shall ba provided with anautomatic or readily accessible manual switch that can turn off-the hot-water circulating purrfp when the system is not in use. O vertical pipe risers shall have 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 of at least 3 1/2 inches(89 mm)in the hot water distribution line and cold water line located as close as possible to the storage tank. O R4ou«.4 Water heater efficiencies(Mandatory). O n403.4.4nStvrag water heater temperature controls . R403.u.«1.1 Automatic controls. Service water heating systems shall bo equipped with automatic temperature oontm|o capable of adjustment from the lowest to the highest acceptable temperature settings for the intended use.The minimum temperature.setting range shall be from 1nu,Fto14o"F(ao^Cmoo^C). • Buo3.o.4.1.2 Shut down. A separate switch oro clearly marked circuit breaker shall be provided mpermit the power supplied m electric service systems tnuo turned off.A separate valve shall be provided to permit the energy supplied to the main burner(s) o/combustion types o/service water heating systems toba turned off. D n4034�2 Water heating equipment. Water heating equipment installed in residential units shall meet the minimum efficiencies of Table C*o«.cin Chapter 4o/the Florida Building Code,Energy Conservation,Commonjo|Pmvivinnn.fortha4moofoquipmontinata||eu. 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 met the criteria Section R4Oo.4.4.2.1. . Ro03a4.c.1 Solar water heating systems. Solar systems for domestic hot water production are rated by the annual solar energy factor of the system.The solar energy factor of a system shall be determined from the Florida Solar Energy Center Directory nf Certified Solar Systems.Solar collectors shall be tested in accordance with ISO Standard 9806,Test Methods 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 atilt angle between 10.degrees and 40 degrees of the horizontal;and u. om installed atan orientation within 4sdegrees of true south. [] 840:.5 Mechanical ventilation pMwnuamnA. The building shall be provided with ventilation that meets the requirements of the Florida Building Code,Residential or Florida Building Code,Mechanical,as applicable,or with other.approved means of ventilation. Outdoor air intakes and exhausts shall have automatic or gravity dampers that close when the ventilation system is not operating. [] R4o3.s Heating and cooling equipment(Mandaton0. The following sections are mandatory for cooling and heating equipment. O n403'6.1 Equipment sizing. Heating and cooling e ui �shall ba sized|na000�omcemi�8CCA Manual a based onthe equipment loads o�vu|�odin accordance w�hACCAManua|Jv,other approved heating and cooling calculation methodologies, based on building loads for the directional orientation of the building.The manufacturer and model number of the outdoor and indoor units(if split system)shall bn submitted along with the sensible and total cooling capacities at the design dib described in Section R302.1.This code does not allow designer safety factors,provisions for future expansion n,other factors which affect equipment sizing. sizing calculations shall not include loads created by local intermittent mechanical ventilation such mm standard kitchen and bathroom exhaust systems. ~ R«om.6.1'1 Cooling equipment capacity. Cooling only equipment shall be selected outhat its total capacity is not less�onthe calculated total load,but not more than 1 15 times greaterthan the total load calculated according mI ho procedureselected in section 400.a.or the closest available size provided by the manufacturer's product lines.The corresponding latent capacity of the equipment shall net ba less than the calculated latent load. ' 11/1//20/71z0RN snergyoaugeO USA'FlaR00004 'Section R*os�.1oum Page 2nf3