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, . . <br /> MANDATORY REQUIREMENTS . (Continued) <br /> ��2.4.4 Rooms containing fuel-burning appliances. In Climate Zones uthrough 8,nhere open combustion air ducts provide combustion air to <br /> open combustion fuel burning appliances,the appliances and combustion air opening shall be located outside the building thermal envelope or <br /> enclosed ina room,isolated from inside the thermal envelope.Such rooms shall be seated and insulated in accordance with the envelope requirements <br /> of Table R402.1.2,where the walls,floors and ceilings shall meet not less than the basement wall R-value requirement.The door into the room shall be <br /> fully gasketed and any water lines and ducts in the room insulated in accordance with Section R403.The combustion air duct shall be insulated where it <br /> passes through conditioned space ma minimum ufR'o. <br /> Exceptions: <br /> 1. Direct vent appliances with both intake and exhaust pipes installed continuous to the outside. <br /> e. Fireplaces and stoves cnmp|yinowith Section R*oc//.2 and Section R1uosvf the Florida Building Code,Residential. <br /> �lR4uo.«.s Recessed lighting. Recessed luminaires installed in the building thermal envelope ahaUboaov|edm|/mit air leakage <br /> --between conditioned andunconditioned s All recessedluminaires shall ue IC-rated and labeled os having om air leakage rate not <br /> more than u.o mm(0y44 in accordance with xGTM eean at a 1.57puf(7e Pa)pmauum differential.All recessed <br /> luminaires shall be sealed with a gasket or caulk between the housing and the interior wall or ceiling covering. <br /> SECTION R403 SYSTEMSR4o�.1 �ontm|o. <br /> Fl R«oa.1.1 Thermostat provision(Mwndcuvr0. At least one thermostat shall be provided for each separate heating and cooling system. <br /> �l R4o3'1.3Ha��pump supplementary heat(Mundoton0. Heotpumpuhoving»upp}emonta�o}em��maiotanw:ho�sh�|hmmcomm� <br /> �� that,except during defrost,prevent supplemental heat operation when the heat pump compressor can meet the heating load. <br /> Fl Rooa.o.2 Sealing<Mandmon0 , All ducts,air handlers,filter boxes and building cavities that form the primary air containment passageways <br /> for air distribution systems shalluruunsidemdducmorplenumohamuam.ohal|b000nnonctodandneo|ndinmmondanoawithSomion <br /> o40o.o.o.00f the Commercial Provisions of this code and shall bo shown mmeet duct tightness criteria below. <br /> Duct tightness shall be verified by testing in accordance with ANSI/RESNET/ICC 380 by either individuals aa defined in Section 000yao(5)o, <br /> (7),Florida Statutes,or individuals licensed as set forth in Section 489.105(3)(f),(g)or(1),Florida Statutes,to be"substantially leak freW'in <br /> accordance with Section R400.3.o. <br /> �l n*03.:,2.1 ooa|ad air handier. 8i,handlers shall have o manufacturers designation for an air leakage of no more than z percent <br /> o[the design airflow rate when tested in accordance with ASHRxs1no. <br /> �l n4ou.n.n Duct mmUng(Mqnumog). Duc�oh�{bepmxxue tested todmnnnino air leakage by one of the following methods: <br /> �� <br /> I Rough-in test:Total leakage measured with a pressure differential u[o1 inch w.g.(25 including the <br /> manufacturer's air handler enclosure if installed at the time of the test.All registers shall be taped or otherwise sealed during the test. <br /> u. Postconstruction test:Total leakage shall be measured with a pressure differential of 0.1 inch w.g.(25 Pa)across the <br /> entire uyomm,including the manufacturer's air handler enclosure.naguxors shall be taped nr otherwise sealed during the <br /> test. <br /> Exceptions: <br /> 1. A duct air leakage test shall not be required where the ducts and air handlers are located entirely within the building <br /> thermal envelope. <br /> o. Duct testing is not mandatory for buildings complying by Section 405 of this code. <br /> A written report of the results of the test shall be signed by the party conducting the test and provided to the code official. <br /> �� <br /> ��B«oo�.5oui|dingcuviUaaywonuauon0. Building framing cavities shall not be used ao ducts nrplenums. <br /> �l R4ou.4 Mechanical ays�mpiping inso|o8on(Mondamn0. W�hanica|oys�mp�|nocapable nfoa��ng8u|uoobmw1Oo~F(41"c) <br /> ��orUelowsu^F<1a^c;noa||bomou|atedmominimumufR-3. <br /> �l n4on.*.1 Protection cx piping insulation. Piping insulation exposed m weather shall he protected from damage,including that <br /> caused uy sunlight, equipment maintenance and wind,and shall provide shielding from solar radiation that can cause <br /> degradation uf the material.Adhesive tape shall not uopermitted. <br /> �l R403.5.1 Heated water circulation and temperature maintenance systems(Mandatory). Heated water circulation systems shall bein <br /> accordance with Section R400.5.I.I.Heat trace temperature maintenance systems shall be in accordance with Section R403.5.1.2. <br /> Automatic controls,temperature sensors and pumps shall beaccessible.Manual controls shall bo readily accessible. <br /> l <br /> R4o3.s1.� oimu|amionmym�ma. Ho�edna�rdmo|ou�n���emsoh�|b� mv�ed=i�ha��u|abonpumpTheuyo�mmmm <br /> � ' ' <br /> �� all be a dedicated return pipe or a cold water supply <br /> Controls for circulating hot water system pumps shall start the pump based on the identification of a demand for hot water within the <br /> occupancy.The controls shall automatically-turn off the pump when the water in the circulation loop is at the desired temperature and <br /> when there is no demand for hot water. <br /> �l nouo.o.1.o Heat trace systems. Electric heat trace systems shall comply with IEEE s1s.1orULo1s.Controls for such systems <br /> shall automatically adjust theonargy(nputmthahmutmdnummaintmnt»odnaimdwate,oemperamminthepipinyinacoovdamoo <br /> with the times when heated water io used|n the occupancy. <br /> - - ~''~^ ~~^~­­ '` =1.3-.0­77­('9th=as""cw17'i omnnnant Svftpmm Page ro|s <br />