Insulation Institute Blog

Do Bigger HVAC Systems Deliver Better Performance?

By: Ben Green, Green Leaf Air

Most homeowners assume that a larger air conditioner will cool their home better, but that’s not necessarily true. On the surface, it sounds logical, but it’s not necessarily accurate. That’s because an oversized unit can make a high-performance home less comfortable, less efficient, and more expensive to operate.

As homes become better insulated and more airtight, their heating and cooling needs change. Yet many HVAC systems are still sized using outdated rules of thumb or by simply matching the old equipment’s size. The result is a system that may cool the home quickly, but struggle to control humidity, maintain consistent temperatures, and operate efficiently.

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The Energy-Efficient Features We Want in Homes

A recent National Association of Home Builders (NAHB) survey revealed that a majority of prospective homebuyers rate energy-efficient features, such as above-code insulation and ENERGY STAR-compliant appliances and building products (including windows, doors, and HVAC systems), as essential or desirable. While the consumer desire for energy-efficient features isn’t new, it has only grown in importance in recent years.

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ENERGY STAR for Homes Gets Update

With the publishing of the 2024 International Energy Conservation Code (IECC), The U.S. Environmental Protection Agency (EPA) has issued new requirements for Energy Star Single-Family New Homes (SFNH) National v3.3 and Multifamily New Construction (MFNC) National v1.3, for states that adopt the 2024 International Energy Conservation Code (IECC), or equivalent.  

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