(redirected from air changes per hour)
Also found in: Dictionary, Thesaurus, Medical, Acronyms, Encyclopedia.
See: appearance, atmosphere, bare, behavior, betray, conduct, deportment, disabuse, disclose, discuss, divulge, expose, express, flaunt, herald, inform, issue, look, manifest, manner, posture, presence, proclaim, produce, promulgate, propagate, publish, relate, report, semblance, signify, speak, spread, tell, utter

AIR. That fluid transparent substance which surrounds our globe.
     2. No property can be had in the air it belongs equally to all men, being indispensable to their existence. To poison or materially to change the air, to the annoyance of the public, is a nuisance. Cro. Cr. 610; 2 Ld. Raym 1163; I Burr. 333; 1 Str. 686 Hawk. B. 1, c. 75, s. 10; Dane's Ab. Index h.t. But this must be understood with this qualification, that no one has a right to use the air over another man's land, in such a manner as to be injurious to him. See 4 Campb. 219; Bowy. Mod. Civ. Law, 62; 4 Bouv. Inst. n. 36 1; Grot. Droit de la Guerre et de la Paix, liv. 2, c. 2, Sec. 3, note, 3 et 4.
     3. It is the right of the proprietor of an estate to enjoy the light and air that will come to him, and, in general, no one has a right to deprive him of them; but sometimes in building, a man opens windows over his neighbor's ground, and the latter, desirous of building on his own ground, necessarily stops the windows already built, and deprives the first builder of light and air; this he has the right to do, unless the windows are ancient lights, (q.v.) or the proprietor has acquired a right by grant or prescription to have such windows open. See Crabb on R. P. Sec. 444 to 479 and Plan. Vide Nuisance.

References in periodicals archive ?
Separate HVAC system for lab facilities, with adequate air changes per hour
Although nine air changes per hour might seem more than adequate, the total amount of outside air being supplied to the natatorium was only 2,000 cubic feet per minute (cfm).
Reduce airflow to 10 air changes per hour for animal care.
Motion sensors adjust the air changes per hour and lighting in all areas;
In fact, many manufacturers insist on as many as 720 air changes per hour to meet Class 10 or cleaner requirements.
5 air changes per hour and 4 air changes per hour were examined to evaluate the sensitivity to ventilation rate.
The facility's dedicated air handler brings in 100-percent outside air with HEPA-in and HEPA-out filtering at the rate of 11,000-cubic-feet per minute and 25 air changes per hour.
Environmental Protection Agency's minimum recommendations range from 4 to 12 air changes per hour (ACH).
The most common and simplest method is based on calculating the number of air changes per hour required in ventilating a building.
Each patient's room met the minimum requirement of six air changes per hour.
Features include an electronic filter monitor, six air changes per hour in a 12-by-14 foot room and acoustic foam insulation for enhanced sound reduction.