Copyright © Philip M. Parker, INSEAD. Terms of Use.

| Domain | Definition |
Energy | The replacement of a quantity of air in aspace within a given period of time, typically expressed as air changes per hour.If a building has one air change per hour, this is equivalent to all of the airin the building being replaced in a one-hour period. (references) |
| A measure of the rate at which the air in an interior space is replace by outside (or conditioned) air by ventilation and infiltration; usually measured in cubic feet per time interval (hour), divided by the volume of air in the room. (references) | |
Mining | A. The quantity of infiltration of ventilation air in cubic meters per second divided by the volume of the room gives the number of so-called air changes during a given interval of time. Tables of the recommended number of such air changes for various rooms are used for estimating purposes.b. The act of instituting a different pattern of air flow in a mine. (references) |
Source: compiled by the editor from various references; see credits. | |
| The following statistics estimate the number of searches per day across the major English-language search engines as identified by various trade publications. Hyperlinks lead to commercial use of the expression at Amazon.com. |
| Expression | Frequency per Day |
air change | 6 |
air change hour per | 5 |
air change color compressed indicator moisture | 3 |
air change control humidity outside rapid | 2 |
air change command force | 2 |
| Source: compiled by the editor from various references; see credits. | |
Scrabble® Enable2K-Verified Anagrams | |
| Words within the letters "a-a-c-e-g-h-i-n-r" | |
-1 letter: reaching. | |
-2 letters: acarine, anergia, anergic, archine, arching, carinae, carnage, chagrin, changer, charing, ganache, hearing. | |
-3 letters: aahing, achier, aching, acinar, agaric, anarch, arcane, arcing, arnica, cagier, cahier, carina, caring, carnie, cering, chaine, change, charge, crania, cringe, earing, eching, enrich, gainer, grinch, haeing, hangar, hanger, haring, hegari, hegira, hernia, hinger, inarch, incage, nigher, racing, reagin. | |
| Words containing the letters "a-a-c-e-g-h-i-n-r" | |
+1 letter: archegonia. | |
+2 letters: archangelic, archegonial, reattaching. | |
+3 letters: archegoniate, charactering. | |
+4 letters: archegoniates, cinematograph, jackhammering, oceanographic. | |
+5 letters: characterizing, cinematographs, cinematography, ethnographical, oceanographies. | |
| Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. | |
Hexadecimal (or equivalents, 770AD-1900s) (references)41 49 52      43 48 41 4E 47 45 |
| Leonardo da Vinci (1452-1519; backwards) (references)
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Binary Code (1918-1938, probably earlier) (references)01000001 01001001 01010010 00100000 01000011 01001000 01000001 01001110 01000111 01000101 |
HTML Code (1990) (references)A I R   C H A N G E |
ISO 10646 (1991-1993) (references)0041 0049 0052      0043 0048 0041 004E 0047 0045 |
Encryption (beginner's substitution cypher): (references)3543522374235484139 |
| 1. Expressions: Internet 2. Anagrams 3. Orthography 4. Bibliography |
Copyright © Philip M. Parker, INSEAD. Terms of Use.