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2. Glossary of HVAC terms - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_HVAC_terms

   Glossary of HVAC terms. HVAC (heating, ventilation, and air conditioning) is a major sub discipline of mechanical engineering. The goal of HVAC design is to balance indoor environmental comfort with other factors such as installation cost, ease of maintenance, and energy efficiency. The discipline of HVAC includes a large number of specialized ...

3. Abrasion (mechanical) - Wikipedia

   en.wikipedia.org/wiki/Abrasion_(mechanical)

   Abrasion (mechanical) Abrasion is the process of scuffing, scratching, wearing down, marring, or rubbing away. It can be intentionally imposed in a controlled process using an abrasive. Abrasion can be an undesirable effect of exposure to normal use or exposure to the elements.

4. Here’s What Building a House Actually Costs Today - AOL

   www.aol.com/much-does-actually-cost-build...

   Those numbers are higher than they were last year, when Home Advisor put the average cost to build a house in the U.S. at $293,542. They also don’t include the cost of land. Anecdotally, we’re ...

5. What Air Conditioning Does to Your Body - WebMD

   www.webmd.com/a-to-z-guides/ss/slideshow-what-ac...

   1 /12. If you work in an air-conditioned building with poor ventilation, it can raise your risk of “sick building syndrome.”. Symptoms include headaches, dry cough, dizziness and nausea ...

6. Air handler - Wikipedia

   en.wikipedia.org/wiki/Air_handler

   A rooftop packaged unit or RTU. An air handler, or air handling unit (often abbreviated to AHU ), is a device used to regulate and circulate air as part of a heating, ventilating, and air-conditioning ( HVAC) system. [1] An air handler is usually a large metal box containing a blower, furnace or A/C elements, filter racks or chambers, sound ...

7. Stress–strain curve - Wikipedia

   en.wikipedia.org/wiki/Stress–strain_curve

   Subscript 0 denotes the original dimensions of the sample. The SI derived unit for stress is newtons per square metre, or pascals (1 pascal = 1 Pa = 1 N/m 2), and strain is unitless. The stress–strain curve for this material is plotted by elongating the sample and recording the stress variation with strain until the sample fractures. By ...