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` ` MANDATORY REQUIREMENTS ~ (Co|tinUm0 ��2.4.4 Rooms containing fuel-burning appliances. In Climate Zones 3 through 8,where open combustion air ducts provide combustion air to opencombustion fuel b ing appliances,the appliances d combustion airin enclosed in a room,isolated from inside the thermal envelope.Such rooms shall be sealed and insulated in accordance with the envelope requirements 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 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 passes through conditioned space to a minimum of R-8. Exceptions: 1. Direct vent appliances with both intake and exhaust pipes installed continuous mthe outside. o. Fireplaces and stoves complying with Section R402.4.2 and Section R 1006 of the Florida Building Code,Residential. �lR4uu�.5 Recessed fighting. Recessed l i i installed i h building thermal envelope shall be sealed to limit air leakage between conditioned and unconditioned spaces.All recessed luminaires shall be IC-rated and labeled as having an air leakage rate not more than u.00hn(0.e44tested in accordance with ASTM E283 at a 1.57 psf(75 Pa)pressure differential.All recessed luminaires shall be sealed with a gasket or caulk between the housing and the interior wall or ceiling covering. R4uo1 Controls. SECTION�� R403 SYSTEMS n R403.1.1 Thermostat provision(Mondatpn0. At least one thermostat shall be provided for each separate heating and cooling system. �l 8oum�.mUa�pump supp|amao��»eo (Mandatory). He�pumps hav�guup�emen��nv�c~mu��ncahmgah� m�(havaoon� �� that,except during defrost,prevent supplemental heat operation when the heat pump compressor can meet the heating load. �l R4ou.o.x Sealing Umandator0 All ducts,air handlers,filter boxes and building cavities that form the primary air containment passageways for air distribution systems shall be considered ducts or plenum chambers,shall be constructed and sealed in accordance with Section C403.2.9.2 of the Commercial Provisions of this code and shall be shown to meet duct tightness criteria below. Duct tightness shall be verified by testing in accordance with ANSI/RESNET/ICC 380 by either individuals as defined in Section 553.993(5)or (7),Florida Statutes,or individuals licensed as set forth in Section 489.105(3)(f),(g)or(i),Florida Statutes,to be"substantially leak free"in accordance with Section H«oo.a.o. �7 n403.3.2.1 Sealed air handler. Air handlers shall have a manufacturer's designation for an air leakage of no more than 2 percent o,the design airflow rate when tested in accordance with AaHR4E1no. 84mm.o.3 Duct testing(mmndmory). Ducts shall be pressure tested to determine air leakage by one of the following methods: I Rough-in test:Total leakage shall bo measured with a pressure differential ofu.1 inch vug.(u5 Pa)across the system,including the manufacturer's air handler enclosure if installed at the time of the test.All registers shall be taped or otherwise sealed during the test. c. Postconstruction test:Total leakage shall be measured with a pressure differential of 0.1 inch we(us Pa)across the entire system,including the manufacturer's air handler enclosure.Registers shall be taped or othenvise sealed during the test. Exceptions: 1. Aduct air leakage test shall not be required where the ducts and air handlers are located entirely within the building thermal envelope. u. Duct testing is not mandatory for buildings complying by Section«nam this code. A written report of the results of the test shall be signed by the party conducting the test and provided to the cocle-official. �� �� B4oV.3/xoui|dm0cavMmoyMoudatunN. Building framing cavities shall not bo used ao ducts mplenums. n403.4 Mechanical system piping Insulation(Mandatory). Mechanical system piping capable of carrying fluids above 1o5°F(41^C) or below a5~F(1o^C)shall ue insulated mo minimum ofR-o. �l e4n3.41 Protection o,piping insulation. Piping insulation exposed to weather shall be protected from damage,including that caused by sunlight,moisture,equipment maintenance and wind,and shall provide shielding from solar radiation that can cause degradation nf the material.Adhesive tape shall not bopermitted. �l o4uo.s� no�adna�rmnvu|ouon and�mpen�vmmoin�nanceova�mmVmaou�nnA' Heated water�mm�mnsvo�mosmmuem �� accordance with Section R403.5.1.1.Heat trace temperature maintenance systems shall be in accordance with Section R403.5.1.2. Automatic controls,temperature sensors and pumps shall be accessible.Manual controls shall be readily accessible. �l Rvuxm.1.1m|n,u|o�nnsystems. Heated w�o,cimui��nnymomoshall bopm�dodv�havimu|a�vn pump.The system onum �� pipe shall boa dedicated return pipe vra cold water supply pipe.Gravity and the,mmoiphun circulation systems shall uoprohibited. Controls for circulating hot water system pumps shall start the pump based on the identification of a demand for hot water within the occupancy.The controls shall automatically turn off the pump when the water in the circulation loop is at the desired temperature and when there iono demand for hot water. R4mm.e.1.2 Heat trace systems. Electric heat trace systems shall comply with IEEE o1o.1 urULs1s.Controls for such systems shall automatically adjust the input to the heat tracing to maintain the desired water temperature in the piping inaccordance with the times when heated water is used in the occupancy. 11/20/20202:50PM EnergyoaugemuaA s000(nay. 1)'RaReuoo1rF8cnm Edition(on17) Compliant Software Page 2mu