As an expert in the field of HVAC, I can tell you that the size of the filter you use depends on the oven. If the filter slot is wide enough to accommodate a 4-inch filter, then you can use it. However, if the slot is less than 4 inches wide, then you'll need to use a 1-inch filter. A 4-inch filter is more efficient than a 1-inch filter and will last longer, providing better air quality for your home.
However, if you force a 4-inch filter into a 1-inch slot, it can affect your energy bills. If you're not prepared to change the filter every month, then a 4-inch filter is not suitable for your system. The MERV (Minimum Efficiency Report Value) rating indicates how well an air filter can collect particulates from your home air. If improving air quality is a priority for you, then the depth of the filter doesn't matter as much as the MERV rating.
If you place a 4-inch filter in a location intended for a 1-inch filter, it can significantly impact air quality. If you opt for a 4-inch filter, you'll get one with at least an MERV 8 rating, which will remove contaminants down to 3 microns (a unit of measurement), including dust mites and some types of pollen. Most HVAC technicians recommend changing 1-inch air filters every 30 days, while 4-inch filters should be changed every 3 to 6 months. When deciding whether to use a 4-inch or 1-inch filter, consider your needs and budget. A 4-inch filter will provide better air quality and last longer than a 1-inch filter, but it may be more expensive and require more frequent replacement.
Ultimately, it's up to you to decide which type of filter is best for your home.
