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Appendix A: Special Requirements For Side-Wall Vented AppliancesIn The Commonwealth of MassachusettsImPOrTaNT
TheCommonwealthofMassachusettsrequirescompliancewithregulation248CMR4.00and5.00for
installationofside-wallventedgasappliancesasfollows:
1. Fordirect-ventappliances,mechanical-ventheatingappliancesordomestichotwaterequipment,where
thebottomoftheventterminalandtheairintakeisinstalledbelowfourfeetabovegradethefollowing
requirementsmustbesatised:
a. Ifthereisnotalreadyonepresent,oneachoorlevelwheretherearebedroom(s),acarbon
monoxidedetectorandalarmshallbeplacedinthelivingareaoutsidethebedroom(s).Thecarbon
monoxidedetectorshallcomplywithNFPA720(2005Edition).
b. Acarbonmonoxidedetectorshallbelocatedintheroomthathousestheapplianceorequipment
andshall:
i. Bepoweredbythesameelectricalcircuitastheapplianceorequipmentsuchthatonlyone
serviceswitchservicesboththeapplianceandthecarbonmonoxidedetector;
ii. Havebatteryback-uppower;
iii. MeetANSI/UL2034StandardsandcomplywithNFPA720(2005Edition);and
iv. HavebeenapprovedandlistedbyaNationallyRecognizedTestingLaboratoryasrecognized
under527CMR.
c. Aproduct-approvedventterminalmustbeused,andifapplicable,aproduct-approvedairintake
mustbeused.Installationshallbeinstrictcompliancewiththemanufacturer’sinstructions.Acopy
oftheinstallationinstructionsshallremainwiththeapplianceorequipmentatthecompletionofthe
installation.
d. Ametalorplasticidenticationplateshallbemountedattheexteriorofthebuilding,fourfeet
directlyabovethelocationoftheventterminal.Theplateshallbeofsufcientsizetobeeasilyread
fromadistanceofeightfeetaway,andread“GasVentDirectlyBelow”.
2. Fordirect-ventappliances,mechanical-ventheatingappliancesordomestichotwaterequipment,where
thebottomoftheventterminalandtheairintakeisinstalledabovefourfeetabovegradethefollowing
requirementsmustbesatised:
a. Ifthereisnotalreadyonepresent,oneachoorlevelwheretherearebedroom(s),acarbon
monoxidedetectorandalarmshallbeplacedinthelivingareaoutsidethebedroom(s).Thecarbon
monoxidedetectorshallcomplywithNFPA720(2005Edition).
b. Acarbonmonoxidedetectorshall:
i. Belocatedintheroomthathousestheapplianceorequipment
ii. Beeitherhard-wiredorbatterypoweredorboth;and
iii. ComplywithNFPA720(2005Edition)
c. Aproduct-approvedventterminalmustbeused,andifapplicable,aproduct-approvedairintake
mustbeused.Installationshallbeinstrictcompliancewiththemanufacturer’sinstructions.Acopy
oftheinstallationinstructionsshallremainwiththeapplianceorequipmentatthecompletionofthe
installation.