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	FAQ Type: [ General ] [ HVAC Definitions ] [ Misc ] Frequently Asked Questions: General Where can I find a dealer for new HVAC Equipment or replacement parts of existing units? Can I purchase units or replacement parts on line? Can I get some advice on installing or repairing my Reznor HVAC Equipment? I have an old Reznor Heater from the 1940's, 1950's, 1960's, 1970's, 1980's, or 1990's in my home / business. Are replacement units or parts available? I am an Engineer/Architect. How can I get technical specifications for your HVAC Equipment? How can I get a wiring diagram for specific piece of equipment? Is there a kit available that will change my Reznor Heater from natural gas to propane fueled (or propane to natural gas)? I need an installation / operation / maintenance / parts /or other type of manual for my hvac equipment. Where can I find this information? What size heater do I need for a space/room that measures (x ft. wide by y ft. deep) I am an hvac/mechanical engineer instructor at my institution (or, I am a student working on a project). Do you have any instructional information on heating and heating equipment. I have an old Reznor Heater. How can I determine exactly how old it is? Is there a comparison tool for Direct Fired versus LDAP units? What is the New York City Approval ( MEA ) Number for Reznor Models? When Engineers specify “CFM”, do they mean ACFM or SCFM? Frequently Asked Questions: HVAC Definitions What is the difference between ACFM and SCFM? Frequently Asked Questions: Misc Is Trent Reznor, the lead singer for the band Nine Inch Nails, associated with Reznor HVAC Equipment? Are those Reznor Unit Heaters hanging in the background of Michael Douglas' loft apartment in the movie, "It Runs in the Family"? I have an old Reznor Heater. How can I determine exactly how old it is? Most Reznor HVAC Equipment built since 1949 has received an individual Serial Number. The Serial Number can be found on the furnace section of the heater on the Unit Rating Plate. The first two or three letters in the serial number will indicate the month and year of manufacture. Please see the Serial Number Table for more information.