Woosh Smart Air Filter Review: No More Guessing

“It’s a useful way to monitor the pressure drop across the filter, which is a great way to know when is the best time to replace the filter, which otherwise requires a lot of guesswork,” Li said. She said the typical three-month replacement recommendation is based on the assumption that the HVAC system is operating at 20 percent (about five hours per day). It depends a lot on your climate, but Lee says a recent study The study found that 20 Toronto homes had their HVAC running for a median of 10 per cent of the year, meaning these people would have to change their filters less frequently.

As for the judgment on MERV 13, Li said the higher flow resistance will make it more difficult for HVAC fans to work. Depending on your system, the fan can stop Working hard, reducing airflow and possibly damaging the cooling coil. However, a higher MERV rating does not equal a higher flow resistance. It depends on the quality of the filter, as Li said she has seen MERV 13 filters with lower flow resistance than MERV 8.

“If this is a relatively new system that’s in good condition and you’ve been using a MERV 8 filter without any problems, then I don’t think you’d have any problems with a MERV 11, MERV 13 or even a MERV 14 filter because even if the flow If there is a difference in resistance, then the difference is relatively small,” she said. “I think most systems can handle this, especially if you don’t change the filters throughout the year.”

People with older systems should be careful as they may not be able to handle HEPA filters at all. She recommends listening to sounds and feeling the airflow from your home’s cooling and heating vents.

The good news is that Woosh’s smart filter can detect problems with your HVAC system. The company says it can identify early signs of frozen coils, which if not addressed can cause irreparable damage. It manages this by checking pressure drop and flow, as well as temperature and humidity levels.

Thankfully, using a MERV 13 filter does not appear to have any adverse effects on my system, and I have not received any notification of HVAC issues. My only concern is that, according to the app, I still No need to replace my filter, even though it’s been nine months since I installed it. My wallet is happy, but everything I’ve heard and read about the filter suggests I should change it now.