What Do Experts Say About How Many HVAC Units You Need?

Heat rises. That means that if your house has more than one story, chances are the top floor is warmer than the bottom one. Even when you run the AC, it never seems to get as cool as the ground floor. Would installing another HVAC unit help service the neglected area more efficiently? How many HVAC units do you need? There are pros and cons to adding a second HVAC unit in your home.

Installing a Second Unit

A second HVAC system could help keep your upper floors cool during the sweltering Florida summers. Additionally, it ensures you have a backup system, so if one breaks down, you’re not left entirely without cool air.

However, installing an extra unit will also cost quite a bit, not to mention use a lot more energy. You also need to be very careful to get both units sized properly. Each unit must be sized to cool only one floor. If the system is too big, the units could end up competing with each other, causing both to cycle on and off too quickly, wasting even more energy and shortening the life span of both units.

Zoning System

Instead of worrying about how many HVAC units you need, you could install a zoning system that services the entire house from a single unit. The house is divided into sections — or zones — based on their individual heating and cooling needs. A thermostat is placed in each section. If the top floor is too warm, the system can send more air there, without affecting the temperature of the bottom floor.

A zoning system is more expensive than a regular HVAC system, but it’s cheaper than two units. It will also save you energy by only providing air to the areas that need it. However, some people feel that an additional unit makes their home feel more comfortable than a zoning system does. Talk to your HVAC contractor and see which option is best for your home’s needs.

For help figuring out how many HVAC units you need, contact us at NisAir Air Conditioning. Palm Beach County’s home-comfort needs are our top priority.

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