Specifications

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Appendix A: Special Requirements For Side-Wall Vented Appliances
In The Commonwealth of Massachusetts
IMPORTANT
TheCommonwealthofMassachusettsrequirescompliancewithregulation248CMR4.00and5.00forinstallation
ofside-wallventedgasappliancesasfollows:
(a) Forallsidewallhorizontallyventedgasfueledequipment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nishedgradeintheareaofthe
venting,includingbutnotlimitedtodecksandporches,thefollowingrequirementsshallbesatised:
1.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sidewall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.
a. 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.
b. 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,however,thatduringsaidthirty(30)dayperiod,abatteryoperatedcarbonmonoxidedetector
withanalarmshallbeinstalled.
2. 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IAS
certied.
3. 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”.
4. 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.
(b) 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.
(c) 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: