The prowess credited to the Sopwith, and to its equally successful antagonist, the Fokker Triplane, resulted in the production of a crop of triplanes, both friend and foe, most of which were, incidentally, without distinction. At the time of its design the Sopwith Triplane was enjoying a considerable success with its excellent manoeuvrability and high rate of climb, it had established a formidable reputation as a fighter, especially among enemy pilots. The quadruplane, which was probably built as a private venture, was designed to meet a requirement referred to in an official report as 'Spec. The production model was certainly designated the F.K.10, and it is more than likely that the earlier version was called the F.K.9, although this nomenclature lacks positive confirmation. The quadruplane which followed the F.K.8 was built in two forms, a prototype, which underwent considerable modification, and a production version of which, however, only a handful were actually built. Our Evaporator Coil Model Number location video can be found by clicking here.O.Tapper Armstrong Whitworth Aircraft since 1913 (Putnam) Our Furnace Model Number location video can be found by clicking here. Our Air Conditioning Model Number location video can be found by clicking here. has posted videos on YouTube to assist you in locating the model numbers: We’ll be more than happy to help you get the information you need and make sure you get the perfect part for your system. If you have any issues with finding your model number or determining what it means, don’t hesitate to contact the HVAC professionals here at HVAC Parts Shop. Model numbers have varied over the years but their general breakdown is consistent for the most part. Note: Rarely will a residential unit have anything other than a P for single phase. P equals single phase 208-230 volt where a Y would equal 3 phase 208-230 volt or you may see a G which equals a 460 volt unit. The P indicates the phase or voltage the unit requires. The revision number is very important in repair part identification as a -1 unit may have a different motor than a -8 would. You may see revision numbers as high as 14 or even 18.
#Armstrong air model number nomenclature series#
Model series can have many revisions over the span of their life. This number indicates a slight revision has occurred to the model series not requiring a series change. The 36 indicates this unit has a BTU capacity of 36,000 BTUs. There are 12,000 BTUs in a ton of refrigeration capacity.
This indicates the tonnage capacity of the unit. The 10 indicates this is a 10 SEER unit, the AC stands for air conditioner (as opposed to heat pump, HP). The revision number is very important in repair part identification as a -1 unit may have a different circuit board than a -8 would.ĭifferent parts of the model number mean different things. This particular furnace is 90% efficient so its BTU output would be.
The actual output of the furnace depends on its efficiency. This furnace has a BTU input of 100,000 BTUs. This is the BTU (British Thermal Unit) rating of the furnace in thousands. This particular unit can be matched with a 3 to 4 ton condensing unit. The capability of air movement of this example furnace is 1200 to 1600 cubic feet per minute of air. There are 400 CFM (Cubic Feet Per Minute) of airflow per ton of cooling. Here the 3/4 indicates a 3 to 4 ton drive. This is the drive or air capacity of the unit.
This is the series number the G meaning gas (Natural or LP). Each of these components have their own unique model number.ĭifferent parts of the model number mean different things. In a residential heating and cooling system there are generally three main components which make up the heating and cooling system: the condensing unit (outside unit), the furnace, and the evaporator coil (both are indoor and generally mounted together). It is essential that you get the complete model number from you HVAC unit when looking for a replacement part to ensure that you get the exact part that you need to make sure that your system is running smoothly and efficiently throughout the year.
#Armstrong air model number nomenclature manuals#
Instruction manuals and service manuals which may have come with your unit do not contain the complete model number required to identify replacement parts (except when the installer actually wrote down the complete model number in them).
The Lennox Model number of your unit is the most important information required in determining the correct replacement part you need.Įach individual unit has its own unique model number which is located on the data plate of the unit.
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