But use of homogenous to mean homogeneous has seen a rise since 2000 sufficient enough for it to now be considered an "established variant". Īlternate spellings omitting the last -e- (and the associated pronunciations) are common, but mistaken: homogenous is strictly a biological/pathological term which has largely been replaced by homologous. The words homogeneous and heterogeneous come from Medieval Latin homogeneus and heterogeneus, from Ancient Greek ὁμογενής ( homogenēs) and ἑτερογενής ( heterogenēs), from ὁμός ( homos, “same”) and ἕτερος ( heteros, “other, another, different”) respectively, followed by γένος ( genos, “kind”) -ous is an adjectival suffix. color, shape, size, weight, height, distribution, texture, language, income, disease, temperature, radioactivity, architectural design, etc.) one that is heterogeneous is distinctly nonuniform in at least one of these qualities. A homogeneous feature is uniform in composition or character (i.e. Where can I find free Armstrong HVAC manuals?įree Armstrong Furnace, Heat Pump, Air Conditioner Installation & Service Manuals, Wiring Diagrams, Parts Lists The website above gives access via search feature to other Armstrong Air HVAC equipment manuals and noticesArmstrong was absorbed as a division of the Johnson Corporation in 1976.Homogeneity and heterogeneity are concepts relating to the uniformity of a substance, process or image. You will need to have the model and serial number of your unit, which can be found on the front or side of your unit. You can check with your installing dealer if you no longer have your installation manual. The warranty term can be found on the back cover of the installation manual for your unit. Where do I find the warranty on my Armstrong Air Unit? How do I tell the age of an Armstrong Air furnace or air conditioner from the serial number? The 8th digit of the serial number, which will be a letter (and typically the next to last digit) denotes the year of manufacture for units manufactured from the 1980s to the early 1990s: A = 1980 I = (not used) Also know, how do I read my Armstrong Air serial number? How to tell the age of an Armstrong air furnace?
In your case, the serial number is 7 digits with no prefix.
The “prefix” serial numbers you mentioned on Armstrong flutes are 2 digits, a dash, plus 5 more digits. How do I Read my Armstrong Air serial number?
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