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2. Heat recovery ventilation - Wikipedia

   en.wikipedia.org/wiki/Heat_recovery_ventilation

   Diagramatic operation of a thermal wheel Ljungström Air Preheater by Swedish engineer Fredrik Ljungström (1875–1964). A thermal wheel, also known as a rotary heat exchanger, or rotary air-to-air enthalpy wheel, energy recovery wheel, or heat recovery wheel, is a type of energy recovery heat exchanger positioned within the supply and exhaust air streams of air-handling units or rooftop ...

3. Respiratory pump - Wikipedia

   en.wikipedia.org/wiki/Respiratory_pump

   The respiratory pump is a mechanism to pump blood back to the heart using inspiration. It aids blood flow through the veins of the thorax and abdomen.. During inhalation, the volume of the thorax increases, largely through the contraction of the diaphragm, which moves downward and compresses the abdominal cavity.

4. Heat and moisture exchanger - Wikipedia

   en.wikipedia.org/wiki/Heat_and_Moisture_Exchanger

   Heat and Moisture Exchanger Heat and moisture exchangers (HME) are devices used in mechanically ventilated patients intended to help prevent complications due to "drying of the respiratory mucosa, such as mucus plugging and endotracheal tube (ETT) occlusion."

5. The Best Humidifiers to Help You Breathe Easier - AOL

   www.aol.com/lifestyle/best-humidifiers-help...

   Warm Mist: Using a heating element to boil water and make steam, warm-mist humidifiers can add some nice heat in the winter but are best kept away from children because of it. You can also use ...

6. Heat waves are getting longer and more brutal. Here’s why ...

   www.aol.com/heat-waves-getting-longer-more...

   Heat can affect vital organs and cause heat exhaustion, heat stroke and even death. If the power goes out when it’s very cold, people can add layers, make fires and huddle together.

7. Artificial ventilation - Wikipedia

   en.wikipedia.org/wiki/Artificial_ventilation

   A machine called a ventilator provides the person air manually by moving air in and out of the lungs when an individual is unable to breathe on their own. The ventilator prevents the accumulation of carbon dioxide so that the lungs don't collapse due to the low pressure.