A clogged air source heat pump filter will cost you in more ways than one!
Gross! This very dirty and neglected indoor unit air filter is crying out for help. If air cannot easily pass through the filter on its way to the heat exchanger, the unit has to work harder and will be far less efficient than you want it to be. Reduced air flow means less heat exchanging, or very simply, less heat. As the unit works harder to pull air through this mess, more energy is used and if we do the math our equation looks like:
dirty grimy filter + more work = higher cost + less heat. A lose-lose situation.
Luckily, a dirty filter is very easy to remedy! We encourage you to read this great post by Building Energy Vermont as it covers all the cleaning details needed to bring your sorry filters back to top notch condition. If you live in a home with pets or carpet you should check your filters at least every two weeks. If your indoor unit is close to your cooking stove, especially if you have an unvented stove, we suggest a weekly check. Dust, combined with greasy stove fumes, can really make a mess of your filter, again, costing your both heat and money. If this reality continues too long, grease and grime will find their way behind your filter and make a more invasive maintenance project necessary.
Consider a deep clean once a year! Some local contractors offer an annual maintenance program that we believe easily pays for itself with improved heat exchanger performance. Ask the contractors listed on our Find an Installer page about their annual service agreements!