Common HVAC Myths Debunked: Expert Advice from Garrett Heating and Cooling Nov 10, 2025

In the world of heating, ventilation, and air conditioning (HVAC), there are many misconceptions that can lead homeowners astray. At Garrett Heating and Cooling, we've heard them all and are here to set the record straight. As trusted HVAC experts, we understand the importance of providing clear, factual information to our customers. Let's tackle some common HVAC myths and provide you with the knowledge you need to keep your system running smoothly.

One prevalent myth is the belief that closing vents in unused rooms saves energy. Many homeowners think that by shutting off air flow to certain areas, their system won’t have to work as hard, thus saving money. However, in reality, closing vents can lead to pressure imbalances in your system. This can increase the strain on your HVAC unit, potentially leading to wear and tear and higher energy bills. Instead, it's more efficient to set your thermostat at a stable temperature and allow your HVAC system to distribute air evenly.

Another common misunderstanding is that routine maintenance isn't necessary for newer HVAC systems. Many people assume that new units are built to last without intervention. While modern systems are more reliable, they still require regular maintenance to perform at their best. Annual check-ups can prevent minor issues from turning into expensive repairs and extend the lifespan of your system. Our experts at Garrett Heating and Cooling recommend scheduling a professional inspection at least once a year to ensure everything is in perfect working order.

There's also a widespread belief that a bigger HVAC system is always better. Homeowners might think that a larger system will heat or cool their home more efficiently. However, properly sizing your HVAC system is crucial for optimal performance. An oversized unit can lead to frequent cycling on and off, which not only reduces efficiency but also wears out the system faster. Conversely, an undersized unit will work overtime and struggle to maintain comfortable temperatures. At Garrett Heating and Cooling, we perform detailed load calculations to determine the perfect system size for your home.

Another myth is that thermostats can be placed anywhere in the house. The location of your thermostat significantly affects your system's efficiency. Installing a thermostat in a spot with lots of sunlight or near a heat source can cause inaccurate readings, making your system work harder than it should. A thermostat should be installed on an interior wall, away from direct sunlight, drafts, and other influences for accurate temperature readings and efficient system operation.

Finally, many people mistakenly believe air filters only need changing once a year. This myth can lead to decreased efficiency and poor indoor air quality. Depending on your system and usage, filters should be checked monthly and replaced every 90 days at minimum. Homes with pets or allergy sufferers may require more frequent changes to ensure clean air circulation.

By debunking these common HVAC myths, Garrett Heating and Cooling aims to empower homeowners to make informed decisions about their systems. Understanding the truth behind these myths can help save money, improve comfort, and extend the life of your HVAC equipment. Remember, when it comes to HVAC care, accurate information and regular maintenance are your best allies in ensuring your home remains a sanctuary of comfort year-round. If you have any questions or need professional assistance, our team at Garrett Heating and Cooling is always here to help.