Here at Essig Plumbing and Heating, we take pride in our heating, ventilation, and air conditioning services. As the premiere HVAC maintenance company in Bethlehem, Pa, we are eager to assist you with all of your HVAC needs. Our expert professionals have all of the necessary tools, training, and years of experience to provide the highest quality services. 

At Essig, our professionals are well-versed in a variety of HVAC services. No matter how unique your concern may be, we can offer you effective services. Our current services include: 

What is HVAC? 

We understand that HVAC may seem complicated for someone who is not well-versed in the world of heating, ventilation, and air conditioning services. That’s where Essig comes in! Our professionals are here to answer your questions and walk you through our processes. Here are some of the basics of HVAC. 

Components of HVAC

The term HVAC stands for Heating, Ventilation, and Air Conditioning. HVAC is a system with many parts that work together to function in your home. While HVAC systems can range in their complexity, here are some of the most common components. 

Air Conditioner

An air conditioner is the unit that cools down your property. They work by sucking air in through vents and cooling it over a coil system. The chilled air is then released back into the property. Air conditioners are powered by electricity. 


Furnaces are used to generate heat that is dispersed throughout your property. They are powered by a fuel source such as natural gas or oil, not electricity. 

Heat Pump

While a heat pump may sound like it only heats air thanks to its name, it actually acts as a heater and cooler. Heat pumps use refrigerant to release heat, and the process is reversed to release cool air into your property. Heat pumps are run by electricity. 


Your thermostat is the device in your home that allows you to change the internal temperature. The thermostat is connected to the entire HVAC system, and multiple thermostats can be installed in different “zones” of your property to achieve certain temperatures in different areas. 


The ductwork consists of tubes that facilitate the hot or cold air to different areas of your property. The ductwork is the pathway between HVAC components and your interior space. 

While there are dozens of components that make up a complete HVAC system, these are some of the most common you may come across. Our professionals at Essig Plumbing and Heating are experts in the field and can answer all of your questions surrounding HVAC. 

Why Essig? 

Since 1938, Essig Plumbing has been the leading HVAC maintenance company in Bethlehem, PA. Our company is dedicated to providing the highest quality and most cost-effective services. Above all, we are committed to our customers, and that is why we have a seven days a week priority response and same-day service whenever needed. If you are looking for HVAC services, make it Essig!