How Does an HVAC System Work?

The concept of HVAC is quite used and fashionable in the air conditioning industry. But what does it mean? Well, it refers primarily to air conditioning, although with many nuances. The term can also be used to understand good practice using ventilation systems with air conditioning or heating.

The meaning of HVAC comes to be “heating, ventilation and air conditioning,” coming from the expression Heating Ventilation Air Conditioning. The beginnings of HVAC are the same as those of air conditioning. We can attribute it to the inventor Willis Haviland Carrier, whose name more than one will sound: today’s name is one of the world leaders in air conditioning equipment.

The engineer developed in 1902 the first machine to cool and control the air’s humidity. He wanted to improve the printing industry’s conditions, as it needed to improve the printing and fixing of ink on the paper of publications affected by the heat. It took him 12 years to adapt his idea to the domestic system and achieve the first air conditioning in history in Minneapolis’s U.S. city. And everything else is a critical milestone in the history of ventilation.

How does each of the elements of HVAC work?

Well, according to Waxahachie HVAC service professionals, the first part is heating. It’s all about bringing heat into the air so you can enjoy a better temperature in winter. Traditionally, heating systems were chosen, but today’s dual-flow mechanical ventilation systems can provide warm air through a heat exchanger, which is much more efficient. Other methods are efficient heat pumps and electric heaters, which have very high consumption.

Cooling. The aim is to provide comfort indoors during the warmer months by cooling the rooms. Undoubtedly, the best-known system is that of air conditioners. They use compressors to compress a gas that will then provide cold air. The problem they have is their high consumption, although it has improved over the years. Other systems are evaporative cooling, suitable for dry climates, and double-flow mechanical ventilation can also introduce cooled air into a room through the same exchanger.

Ventilation. It has existed for many centuries since air renewal in an enclosed room is essential for good health. Historically, when buildings allowed air to pass through easily, mechanical systems were not so necessary. Today, however, buildings are more airtight, so air does not leak through walls, doors, and windows, so a ventilation system is needed. With dual-flow ventilation systems in airtight buildings, we can achieve the necessary thermal comfort without air conditioners in summer and heating in winter.

HVAC refers to the three concepts’ connection in a methodology that achieves improved indoor comfort and health. It is essential to note that building construction is paramount for the proper use of HVAC systems. Thanks to Waxahachie HVAC services, today we have homes such as passive houses, which are examples of how we can improve comfort without air conditioning.

We also have to consider HVAC other secondary concepts but rooted in air conditioning. The main one would be humidity control, which will significantly influence our thermal sensation and health. Others are indoor air movement and cleanliness, which can be optimized indoors with a mechanical ventilation system.