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Top 10 Hvac Myths Debunked

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Ann Davis is an avid HubSpot-certified Content Marketer in the Technology, Health and Wellness, and Home and Lifestyle niches.

There’s so much information around HVAC systems and how to maintain them in good condition. It’s hard to tell the truth from myths, but in this article, we strive to debunk most of the commonly held HVAC myths. With the right information, you can choose the best system for your home and ensure you maintain it in the best working condition.

Myth 1: The bigger the size of your air conditioner, the more efficient it will be at cooling your house.

Fact: It’s not true that a larger HVAC system will give you better comfort or help you save more on bills. The most important thing when replacing your unit is to check that its size is adequate for your home. An overly large HVAC system will likely go on and off more times than you’d like.

These frequent fluctuations will result in high humidity inside the home, poor air distribution, and dust from leaking ductwork. An HVAC system of the right size may run longer than a large one. However, it’ll have more energy efficiency and ensure your space stays comfortable.

Myth 2: Changing the filter once a year is enough.

Fact: While most people think that this is true, it’s one of the biggest mistakes you can make with your HVAC system. Due to this belief, many people forget to change the filter annually.

The truth is that it’s best to change the filter every 30 days, especially if you have any pets around the house. Remember the filter traps a lot of fur and dander. Changing it regularly will keep the system more efficient.

Myth 3: Turning the AC off when leaving the house wastes energy.

Fact: There’s a common misconception that it’s better to leave the AC set to a higher temperature during the day. People think that this creates more energy efficiency than turning the unit off completely. The truth is that shutting off your unit when it’s not in use saves more energy and reduces your bills.

As a tip, consider using the new programmable thermostats that automatically shut off the AC when you leave. They also turn it on before you return, so you find your house in the right temperature condition.

Myth 4: Leave your thermostat set to the same temperature throughout the day and night. Doing so reduces the amount of energy it takes to heat a room after turning off the unit.

Fact: Programmable thermostats are the greatest proof that this misconception couldn’t be further from the truth. Programmable thermostats adjust your home temperature throughout the day, taking less energy to warm up a cold house than maintain consistent energy throughout the day.

Consider buying a programmable thermostat and have it professionally installed. Get an expert in HVAC systems to guide you on how to best use this kind of thermostat.

Myth 5: HVAC systems don’t require regular maintenance unless they break down.

Fact: Would you wait for your car to break down to take it for servicing? Certainly not, and the same case applies to your HVAC system. It’s crucial to have it regularly checked to ensure it’s in the right working condition at all times. You also want to catch any problems early enough before they escalate into costly repairs.

Myth 6: It’s easy to find the source of air leaks around your home.

Fact: Spotting air leaks around the home seems like a simple task, but even the biggest leaks can be challenging to find. Let a qualified and professional HVAC service technician help you find and seal any leaks to prevent energy loss and improve system efficiency.

Myth 7: You should cover your HVAC system during winter.

Fact: In making HVAC systems, manufacturers consider several factors. Among them is the ability of the units to withstand harsh weather conditions like snow, rain, and high temperatures. When you cover your system, you don’t help in its performance but only put it at considerable risk.

Rodents can make a home in the covered area and damage the rubber covers and wires. Covering the system also leads to moisture accumulation, which can cause destructive mold to grow and rust to develop.

Myth 8: Duct tape is ideal for sealing air duct leaks

Fact: Duct tape isn’t the most appropriate product to use in sealing air ducts. Its downside is that it doesn’t stick very well and tends to peel easily.

It’s always recommendable to have a professional seal your air ducts using industry-standard products. For a DIY approach, consider using aluminum foil tape instead. You may also use mastic sealant as an alternative. Remember to clean the duct connections first before applying the sealant or foil for the best results.

Myth 9: Windows cause the most significant loss of cooling and heating in the house.

Fact: Windows that are not adequately insulated may lead to energy loss and higher energy bills. However, you’re more likely to lose higher amounts of energy through the roof or ceiling. Almost half of all cooling and heating loss comes from a poorly insulated ceiling or roof. The walls are also other places where this loss occurs.

All the same, ensure you fix all air leaks around your windows. With proper caulking and upkeep, you should be able to reduce your heating and cooling bills significantly.

Myth 10: Closing off vents and registers helps reduce heating and cooling costs.

Fact: Vents and registers have levers that make it possible to close off airflow. However, doing so is not always a good idea. Central HVAC systems are designed to balance the pressure load in your entire home and duct system.

Blocking one or more vents intentionally or otherwise affects how the system breathes in and out. A lack of balance in the system may cause the system to develop airflow and pressure issues.

Get Help Debunking all HVAC Myths

A lot misconception exists concerning HVAC systems. If you’ve heard something about them and are not sure if it’s true, please consult an expert. You’ll be surprised to find out that much of what you thought is true about the systems is actually just a myth.

© 2021 Ann