Top HVAC Myths Debunked

September 25 2020

James Patten


HVAC systems are ideal in working environments like factories and warehouses to maintain a consistent, comfortable temperature. Excessive heat and cold can be detrimental to worker’s concentration levels, directly impacting productivity. So an HVAC system is one of the easiest ways to maintain comfortable temperature levels regardless of the weather outside.

But there are a number of myths about these systems that continue to circulate, and we hope to put them to bed. Here are some common myths about HVAC that we have debunked for you.

Air Conditioning in the Office

Filters Only Need to Be Changed Once a Year

Most of the issues that occur in HVAC systems are related to airflow issues, which can be directly linked to a dirty filter. Dirty filters prevent air travelling through the system, and both heating and cooling are affected by the amount of airflow. A blocked filter can reduce airflow by up to 90%. Aside from a reduction in airflow, a blocked filter could eventually lead to a blower motor failure, compressor failure and a lack of cooling. When in heating mode, the furnace could overheat and shut down.

A lot of people think that once a year is sufficient for changing out an HVAC filter, but this is not the case. They should be changed every few months, possibly even more frequently for buildings that are consistently dusty or smoky.

Bigger Systems are Better

You may think that the bigger the HVAC system, the better it will operate; however, this can be an expensive myth. The size of the building, the number of windows and doors in the building, the quality of insulation and even the amount of trees growing nearby can affect how many units are needed to effectively heat or cool the building.

A system that is too big will cycle on and off repeatedly, wasting energy and shortening the system’s working life. Of course, a too-small system will be unable to keep the building at a consistent temperature. If you’re uncertain, you can contact an HVAC provider like Heritage Heating and Cooling for expert advice and guidance about the right kind of system needed in your building.

Maintenance Can Be Done Yourself

This is definitely false; HVAC maintenance should always be performed by a trained professional. Maintenance is critical to system operation and safety, and it can be a hazardous job. Unless you are a trained engineer, you should never attempt maintenance yourself. Always call in a professional to do the job for you.

At Heritage Heating and Cooling, we offer nationwide service and repair to all leading models HVAC systems. Our highly experienced professionals can ensure everything is working as it should be and provide regular maintenance or simply provide repairs when problems occur.

HVAC Being Repaired

Thermostats Can Be Installed Anywhere

Thermostats are sensitive to temperature, so their installation spot is important. It won’t work properly if it is installed near a source of heat, such as a fireplace, a place where a door frequently opens to outside, or a window. It should also not be installed in a kitchen or bathroom or anywhere that receives direct sunlight.

These placements could all cause false readings on the thermostat, making it think that it is warmer than it actually is, which will activate the AC prematurely and waste energy.

Turning the Thermostat All the Way Down Cools Faster

Reeling from an unexpected heatwave? Is the office sweltering? Well, don’t reach for that thermostat and drop it all the way down to the lowest temperature in the hopes that will make the building cooler quicker, unfortunately, it doesn’t work like that.

Whatever temperature you set, your HVAC will only work so hard to reach it, and it will always do so at the same rate. Turning it down too much will just make the air conditioner cycle on and off more frequently, which can eventually wear down the internal mechanisms.

The same applies to heat. The system won’t work any faster just because you bump the temperature up or down significantly. So make sure you set a realistic temperature and just hang on while the system works its magic. Fortunately, many models can be set remotely, so you can programme it to be set to a specific temperature before you come into the office the next day, so you don’t have to wait around in the morning for that ideal temperature to be reached.


We hope you have learned something new about HVAC systems and can appreciate these fantastic systems. If you are considering a new system for your workplace, at Heritage Heating, we can offer you factory heating, industrial heating and much more. We stock only the very best in air conditioners and heaters, in a wide variety of designs and system types. So whether you own a large factory, an office or a restaurant, we will have an HVAC system perfect for your needs. Contact us today to find out more.

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