Wall Heater

Do You Have to Install a Wall Heater Under a Window?

4 min read

Are you looking to increase your wall space? Want more flexibility on furniture placement in the room? Or merely considering an upgrade to a wall heater to give more rapid heat up than with a standard electric baseboard heater.

Chances are if you're upgrading from a baseboard, that heater was installed on an outside wall under a window. That's because when baseboards are installed under a window, they work with the natural flow of air inside a room to spread heat. The gist is that cold air from the window mixes with warm air rising out of the baseboard, that warm air moves around the room, cools and sinks back to the floor, where it is eventually re-heated by the baseboards. That's why traditionally it's recommended to install a baseboard under a window.

But that is not the case with a wall heater?

Wall Heater

Where to Install a Wall Heater?

Since wall heater are installed inside the wall, we suggest you install a wall heater on an inside wall since then you're not cutting into a stud cavity filled with insulation.


The advantages to a wall heater is that it also gives you more space to place your furniture and is much better at quickly heating up a room than a baseboard heater. The fan inside the heater will also help spread warm air through the room, so the natural airflow isn't quite as big of a concern. It's a big upgrade in a compact package!


We want to make sure that the upgrade process is an easy one. So, if you are replacing an existing baseboard heater with a wall heater it might mean moving the wires to an inside wall. This could be expensive and potentially time-consuming re-wiring process for you or your electrician. If you already have wires running on a outside wall where the baseboard was previously installed, there's no need to move the wires, you can merely use those wires to install your new wall heater on the outside wall too.

Guide to Installing wall heater under a window

If you are installing a wall heater below a window, keep the clearance requirements in consideration, these can be found in your owner's guide. The biggest thing to watch out for are drapes and other window coverings. Also make sure that your heater isn't blocked by an open door or has an electrical outlet above the heater. And of course, if you ever have any questions, just give us a call or send an e-mail. We at Cadet are happy to help you make sure your upgrade process is smooth and you are happy with your new wall heater.


For more information on wall heaters or installing one, Watch Steve from Cadet tech support install a wall heater.

Install Wall Heater