Woman adjusting the temperature on smart thermostat

HVAC Systems: Why You Don’t Want to Go “Too Big” or “Too Small”

Navigating the world of HVAC systems can be daunting for homeowners. When you need to find the perfect fit for your home, you may be tempted to look only at the price and quality. However, there is more that goes into choosing the right one! Calculating the load of your home, or the amount of heating and cooling required to maintain a comfortable temperature, is vital to finding the correct size HVAC system.

Why the Size of Your HVAC System Matters

Why is this so important to find the right size HVAC system? An improperly sized HVAC system will have a shorter lifespan since it’s inefficient. The lack of efficiency can also cause your energy bills to skyrocket.

Below, we’ll break down the common issues that can occur from an undersized or oversized system.

Risks of Undersized Systems

Too Little Power

While a smaller HVAC system is cheaper, it may not be worth the upfront savings. If it is too small for your home, it will constantly struggle to keep the temperature consistent and comfortable. Some areas of your home may need to be cooler or warmer, so you may end up investing in a supplementary heating or cooling unit. Why aim for a smaller price tag if you’ll have to spend more money down the road to compensate for the lack of efficiency?

Higher Energy Bills

If your HVAC system is too small to heat or cool your home efficiently, your energy bills can skyrocket. When the system needs to work harder to try and meet the demand, it requires more electricity than it was designed to use. On very hot or cold days, you risk the chances of it overheating and shutting down completely! Even if you set your thermostat to a comfortable temperature, your system may never reach that desired comfort level.

Risks of Oversized Systems

Too Much Power

When an HVAC system is too large for a home, it will have too much power. This may sound like a good thing at first, but the last thing you want is a system that short cycles! Short cycling is when an HVAC system reaches the programmed temperature in a home too quickly, so the thermostat shuts the program down before running its complete cycle. Short-cycling increases wear and tear on the system, which results in less efficiency and a greater chance of a breakdown.

Lack of Comfort

An oversized HVAC system can decrease your level of comfort. When you don’t benefit from gradual, even heating and cooling, you can end up with several hot or cold spots throughout your home. When you have a short cycling system, the air filtration time is reduced significantly. Reducing this time causes air filtration issues, which leads to dust and particles circulating through your indoor air. A properly sized system filters the air more efficiently to remove pollutants from your home.

Benefits of a Properly Sized System

While you don’t want an undersized HVAC system that struggles to keep your home comfortable and causes energy bills to skyrocket, you also don’t want an oversized system because you risk the chances of it short cycling, which can lead to inefficiency and an eventual breakdown. A properly sized system will work more efficiently to heat or cool your home, not running too little or too much.

How to Determine What Size You Need

The energy an HVAC system uses to heat or cool your home is calculated in British Thermal Units (BTUs). Knowing the amount of BTUs it takes to heat and cool your home will determine what size system you need. It’s best to leave this step to the professionals to ensure you have precise measurements and find the perfect fit.

At Zimmermann Air Conditioning & Heating, we’re committed to helping you find the perfect HVAC system for your home! Get in touch with our experts today at (210) 880-0885 for unmatched installation service in San Antonio.

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