What does air mean in text? AIR is a slang word which means to “Ignore or Blank Someone.” What do we mean by air? Air is the invisible mixture of gases that makes up the Earth’s atmosphere. …Speaking scientifically, the word air refers to an invisible mixture of gases, including oxygen, nitrogen, and small amounts of many other gases.

01/05/2014 · When used in relation to air conditioning systems or heaters, the measurement is expressed in terms of how many BTUs per hour the product can add or remove from the air. With that said, unless you are involved in the manufacturing or retailing of cooling and heating supplies, this may not mean anything to you. But it should, and here’s why:

14/09/2016 · Air Conditioning Tonnage – What is it? Air conditioning tonnage has nothing to do with weight. A ton, as used in the HVAC field, is a term that describes how much heat the AC unit can remove from a home in one hour. The measurement for heat is the British thermal unit (BTU). One ton of air conditioning can remove 12,000 BTUs of air per hour.

09/02/2018 · Oxygen saturation levels measure the degree to which the haemoglobin contained in the red blood cells (erythrocytes) has bonded with oxygen molecules. Oxygen is taken in by the lungs when we breathe in. The two most common ways of assessing the saturation of oxygen in the blood are arterial blood gases (ABG) and pulsatile oxygen.