5 Major HVAC Facts and Myths You Need to Know About


Misconceptions aren’t great—but it’s even worse when they hurt your bank account. There are several little HVAC facts and myths that could be costing you money right now.

These persistent myths can lead you to install the wrong HVAC system, run up unnecessary expenses, or compromise your comfort.

At Blue Flame Heating and Air, we do more than maintain and repair your HVAC. We want to help you understand your system fully so you get as much value as possible.

Need help now? Call 206-388-5667 or schedule service online today.

Myth #1: A Bigger HVAC Is Better

Ask any homeowner, and you’ll likely hear that bigger models are always better. While it might make sense to choose a larger size for a faster performance, going too big can actually increase costs.

An oversized HVAC feels great while you’re using it. However, since it’s designed for a bigger home, it can use up a lot of energy (and money) quickly. Short cycling is a big issue here—the unit turns off and on frequently, hurting efficiency.

A smaller HVAC that’s better suited to your space will give you similar results, but at a lower cost.

Myth #2: Duct Tape Is a Good Fix for HVAC Leaks

Is your HVAC system leaking? You may be tempted to go the DIY route and grab a little duct tape, but you might actually make the problem worse.

HVAC systems may leak because of clogged drain lines or a frozen evaporator coil. When you use duct tape, you provide a short-term solution to a long-term problem.

Ongoing leaks create higher energy bills while making your unit run twice as hard. Not only do you spend more money unnecessarily, you increase the risk of your unit breaking down suddenly.

See a leak? Give us a call, and we’ll patch it up before it causes any more issues.

Myth #3: The Temperature on Your Thermostat Is Always Accurate

One of the most common HVAC facts and myths is that your thermostat has the final say on temperature. Unfortunately, thermostats don’t always give accurate readings.

Older thermostats may not reflect the nuances of newer, energy-efficient models. Even if you have a newer thermostat, it might not be properly calibrated and could be providing inaccurate readings. Placement can also impact precision.

Calling a professional for a thermostat check-up ensures your model has been appropriately tested and calibrated for your home. If your current model is outdated, they can recommend a newer, more accurate option.

Want more great ideas for saving money? Check out our blog.

Myth #4: Closing Vents Saves Money

Closing the vents can actually make your system perform worse by compromising airflow. Vents help HVAC systems maintain steady airflow and air pressure, enabling them to circulate air smoothly.

When you block the vents, your system won’t be able to regulate temperature consistently. You can also worsen your indoor air quality by trapping in more dust and dirt.

Adjusting your thermostat settings and scheduling yearly tune-ups are better ways to save a little on your HVAC bills. We offer heating and air conditioning check-ups that catch small problems early to help you avoid bigger, more costly repairs.

Myth #5: Denser Air Filters Are Better for Your HVAC System

Of all the air conditioning misconceptions we’re covering, this one has a major impact on your comfort. Denser air filters may do a good job at trapping airborne particles, but they have the frustrating side effect of restricting airflow.

Restricted airflow means your HVAC system has to work harder to circulate air. Over time, you’ll notice higher energy bills and worse air quality.

There are several filter types you can use to keep your HVAC working smoothly. A MERV-8 is an industry standard that will suit most households. If you have seasonal allergies or a sensitive constitution and your system is compatible, you can switch to a MERV-13.

Let Blue Flame Air Maintain Your HVAC

Dispelling these HVAC facts and myths is just the beginning of taking care of your system, but you don’t have to do it all by yourself. Blue Flame has been helping Seattle homeowners debunk myths, improve HVAC performance, and enjoy a more comfortable home since 1994.

Our Pro Service Plan also offers several discounts and priority service for fast repairs. When it comes to your satisfaction, we’re always going above and beyond.

Think your HVAC could use a second opinion on its performance? Schedule an appointment with us today. We’ll be happy to take a look.

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