Do all HVAC furnaces need filters? The answer is a resounding yes! Without an air filter, more dust and debris will reach the main components of your heating system, causing damage to the coils, fan motor, and more. Plus, without an air cleaner, your oven won't operate efficiently, resulting in a higher heating bill. If you're having trouble locating your filter, it's possible that your oven doesn't have one. Reasons for this could include the filter being hidden behind panels, inside a duct opening, or even behind other equipment.
To find the air controller or the oven itself, look for the air filter next to them. It's important to be aware of the risks of operating an oven without a filter and to be prepared to replace it in case of a breakdown. The air cleaner can also be found in a slot above or below the HVAC unit, or just behind your home's return grilles (see image below). The oven filter should be changed every 90 days, especially when using the oven and air conditioner.
Different filters have different lifespans, so make sure you get the right type for your oven. Not having an oven filter and not maintaining it properly can lead to safety issues. Also known as whole-house air filters, you want your oven filter to be clean so that it can provide you and your family with the freshest possible air without problems during the winter months. The original purpose behind oven filters was simply to prevent things from damaging components when entering the fan section of the oven.
If you have a horizontal HVAC unit, the oven filter will be located on the inlet side and slide on a rack.