UHD S TANDARD D UCT FURNACE INSTALLATION OPERATION AND S ERVICE M ANUAL8 of 55SECTION 5: NATIONAL STANDARDS AND APPLICABLE CODES5.1 Gas CodesThe type of gas appearing on the serial platemust be the type of gas used. Installation mustcomply with national and local codes andrequirements of the local gas company.United States: Refer to NFPA 54/ANSI Z223.1 -latest revision, National Fuel Gas Code.Canada: Refer to CSA B149.1 Natural Gas andPropane Installation Code.5.2 Aircraft HangarsInstallation in aircraft hangars must be inaccordance with the following codes:United States: Refer to Standard for AircraftHangars, NFPA 409 - latest revision.Canada: Refer to Natural Gas and PropaneInstallation Code, Standard CSA B149.1 - latestrevision.5.3 Parking Structures and Repair GaragesInstallation in garages must be in accordancewith the following codes:United States: Refer to Standard for ParkingStructures, NFPA 88A - latest revision or theCode for Motor Fuel Dispensing Facilities andRepair Garages, NFPA 30A - latest revision.Canada: Refer to Natural Gas and PropaneInstallation Code, Standard CSA B149.1 - latestrevision.5.4 ElectricalThe heater must be electrically grounded inaccordance with the following codes:United States: Refer to National ElectricalCode ®, NFPA 70 - latest revision. Wiring mustconform to the most current National ElectricalCode ®, local ordinances and any specialdiagrams furnished.Canada: Refer to Canadian Electrical Code,CSA C22.1 Part 1 - latest revision.5.5 VentingThe venting must be installed in accordancewith the requirements within this manual andthe following codes:United States: Refer to NFPA 54/ANSI Z223.1 -latest revision, National Fuel Gas Code.Canada: Refer to CSA B149.1 Natural Gas andPropane Installation Code.5.6 High AltitudeThese heaters are approved (withoutmodifications) for installations up to 2000' (610m) in US and Canada. Heaters installed above2000' (610 m) must be de-rated. Forinstallations above 2000' (610 m) in US, consultfactory for information on burner de-rating. Forinstallations from 2000' (610 m) to 4500'(1370m) in Canada, high altitude conversionkits are available. Heaters installed over 4500'(1370 m) in Canada are not approved and mustbe approved by the local or provincial authority.