8
Forallsidewallterminated,horizontallyventedpowervent,directvent,andpowerdirectventgasfueledwaterheaters
installedineverydwelling,buildingorstructureusedinwholeorinpartforresidentialpurposes,includingthoseowned
oroperatedbytheCommonwealthandwherethesidewallexhaustventterminationislessthanseven(7)feetabove
finishedgradeinthe areaofthe venting,includingbutnot limitedtodecksand porches,thefollowingrequirements
shall be satisfied:
InstallatIon of carBon MonoXIde detectors Atthetimeofinstallationofthesidewallhorizontalventedgasfueled
equipment,theinstallingplumberorgasttershallobservethatahardwiredcarbonmonoxidedetectorwithanalarmandbatteryback-up
isinstalledontheoorlevelwherethegasequipmentistobeinstalled.Inaddition,theinstallingplumberorgasttershallobservethat
abatteryoperatedorhardwiredcarbonmonoxidedetectorwithanalarmisinstalledoneachadditionallevelofthedwelling,building
orstructureservedbythesidewallhorizontalventedgasfueledequipment.Itshallbetheresponsibilityofthepropertyownertosecure
theservicesofqualiedlicensedprofessionalsfortheinstallationofhardwiredcarbonmonoxidedetectors.
Intheeventthatthesidewallhorizontally ventedgasfueledequipmentisinstalledinacrawl spaceoranattic,thehard
wiredcarbonmonoxidedetectorwithalarmandbatteryback-upmaybeinstalledonthenextadjacentoorlevel.
Intheeventthattherequirementsofthissubdivisioncannotbemetatthetimeofcompletionofinstallation,theownershall
haveaperiodofthirty(30)daystocomplywiththeaboverequirementsprovidedthatduringsaidthirty(30)dayperiod,a
batteryoperatedcarbonmonoxidedetectorwithanalarmshallbeinstalled.
approved carBon MonoXIde detectorsEachcarbon monoxidedetectorasrequired inaccordancewith the
aboveprovisionsshallcomplywithNFPA720andbeANSI/UL2034listedandCSAcertied.
sIGnaGe Ametalorplasticidenticationplateshallbepermanentlymountedtotheexteriorofthebuildingataminimum
heightofeight(8) feetabovegradedirectly inlinewiththe exhaustventterminal forthehorizontallyvented gasfueled
heatingapplianceor equipment.Thesignshall read,inprint sizenoless thanone-half(1/2) inchinsize,“Gas vent
dIrectlY Below. Keep clear of all oBstructIons.”
InspectIon Thestateorlocalgasinspectorofthesidewallhorizontallyventedgasfueledequipmentshallnotapprovethe
installationunless,uponinspection,theinspectorobservescarbonmonoxidedetectorsandsignageinstalledinaccordance
withtheprovisionsof248CMR5.08(2)(a)1through4.
eXeMptIons:Thefollowingequipmentisexemptfrom248CMR5.08(2)(a)1through4:
1.TheequipmentlistedinChapter10entitled“EquipmentNotRequiredToBeVented”inthemostcurrenteditionofNFPA
 54asadoptedbytheBoard;and
2.ProductApprovedsidewallhorizontallyventedgasfueledequipmentinstalledinaroomorstructureseparatefromthe
 dwelling,building,orstructureusedinwholeorinpartforresidentialpurposes.
Manufacturer requIreMents - Gas equIpMent ventInG sYsteM provIded When the manufacturer of Product
Approvedsidewallhorizontallyventedgasequipmentprovidesaventingsystemdesignorventingsystemcomponentswiththe
equipment,theinstructionsprovidedbythemanufacturerforinstallationoftheequipmentandtheventingsystemshallinclude:
1.Detailedinstructionsfortheinstallationoftheventingsystemdesignortheventingsystemcomponents;and
2.Acompletepartslistfortheventingsystemdesignorventingsystem.
Manufacturer requIreMents - Gas equIpMent ventInG sYsteM not provIded When the manufacturer
ofaProductApprovedsidewallhorizontallyventedgasfueledequipmentdoesnotprovidethepartsforventingtheflue
gases,butidentifies“specialventingsystems,”thefollowingrequirementsshallbesatisfiedbythemanufacturer:
1.Thereferenced“specialventingsystem”instructionsshallbeincludedwiththeapplianceorequipmentinstallationinstructions;and
2.The“specialventingsystems”shallbeProductApprovedbytheBoard,andtheinstructionsforthatsystemshallinclude
 apartslistanddetailedinstallationinstructions.
AcopyofallinstallationinstructionsforallProductApprovedsidewallhorizontallyventedgasfueledequipment,allventing
instructions,allpartslistsforventinginstructions,and/orallventingdesigninstructionsshallremainwiththeapplianceor
equipmentatthecompletionoftheinstallation.
InstallatIon requIreMents for the coMMonwealth of Massachusetts