HVAC contractors planning home addition

When you add a new space to your home, you’ll need to consider how you will heat and cool that space. What kind of HVAC options do you have when you’re adding a home addition, especially if you have an old home or don’t want to extend the ducts to the addition? We’ll help you explore your options below.

Extend the Existing HVAC System

Depending on the specifics of your home and its current HVAC set-up, you may simply be able to extend your ductwork to the addition and let your system handle it. However, you won’t be able to do this if your furnace or air conditioner are not rated for the extra space. Using an undersized HVAC unit is bound to create a less comfortable home, with cold spots or warm spots. It will also stress the unit itself and lead to repairs and early replacement. You could replace your existing system with larger units if you’d like to just have one system in the house.

Ductless Mini-Split Systems

Ductless mini-split systems are one of the most popular options for home additions because they are convenient to install, as you do not need to install ductwork with them. Instead, they can be installed directly onto a wall in your addition and simply need a vent outside. Ductless mini-split systems are also highly efficient so it makes sense that you might prefer this option if you’re trying to keep your utility costs low in the addition. Particularly if you’re renting the space, the consistency and low cost of the HVAC system might be important to you.

Also, ductless mini-split systems are convenient because they can both heat and cool a space. You’ll only need one unit for all four seasons.

To learn more about HVAC options for your home addition, contact our team at D&B ClimateCare today!

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Window Air Conditioners

Window air conditioners are a potential option to cool your new addition. They are convenient, and at a low cost compared to many other options. On the other hand, they take up a spot in your window, don’t always look great, and aren’t the most energy-efficient solution out there.


You could add a second furnace to your home to heat very large additions. This can be an energy-efficient option if your space is large enough to merit a furnace and you’ve chosen a high-efficiency furnace. If you choose a furnace, you’ll also have to pair it with a cooling option of course.

Heat Pumps

Heat pumps are great options to help heat additions. If you don’t think your furnace can quite handle all of the additional space, then a heat pump is a good supplement. It typically can’t heat up a whole home on its own and usually should be paired with a furnace anyway, making this an ideal situation for a heat pump.

Thinking about adding to your home? It’s important to make sure you add the right HVAC system. At D&B ClimateCare, we can help. Give our team a call today.

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