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2. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   In the lower middle is the capacitor. Heating, ventilation, and air conditioning (HVAC) is the use of various technologies to control the temperature, humidity, and purity of the air in an enclosed space. Its goal is to provide thermal comfort and acceptable indoor air quality.

3. HVAC control system - Wikipedia

   en.wikipedia.org/wiki/HVAC_control_system

   HVAC control system. HVAC (Heating, Ventilation and Air Conditioning) equipment needs a control system to regulate the operation of a heating and/or air conditioning system. [1] Usually a sensing device is used to compare the actual state (e.g. temperature) with a target state. Then the control system draws a conclusion what action has to be ...

4. 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 ...

5. Central heating - Wikipedia

   en.wikipedia.org/wiki/Central_heating

   Central heating. A central heating system provides warmth to a number of spaces within a building from one main source of heat. It is a component of heating, ventilation, and air conditioning (short: HVAC) systems, which can both cool and warm interior spaces. A central heating system has a furnace that converts fuel or electricity to heat.

6. Here's How Much It Actually Costs to Build a House - AOL

   www.aol.com/lifestyle/heres-much-actually-costs...

   The average cost to build a house is $150 per square foot, but can cost upwards of $500 in larger cities like New York City or San Francisco. "The size and type of house you choose to build will ...

7. Here's the Best Time to Call Customer Service - AOL

   www.aol.com/news/on-best-time-to-call-customer...

   Your best bet is to put in your request anywhere between 9 a.m. and 11 a.m.; after that, the average response time declines over the course of the day. Zendesk. As the graph shows, requests put in ...