On this blog, we’ve written many articles for first-time air purifier users. However, it’s also worth noting that even the best air purifiers wear out over time, and many people are using models that are badly outdated. Here are three of the top signs that it’s time for you to buy a new air purifier.
 Your Air Purifier Eats Up a Lot of Electricity
If the unit you’re using is adding a substantial amount to your electrical bill, it’s a good sign that it’s time for a replacement. Older air purifiers were major energy consuming appliances. Today, however, the machines have become more efficient and less expensive to operate. For the best energy efficient upgrades, check out our complete lineup of Energy Star certified air purifiers.
 You Start Hearing Unusual Humming or Buzzing
If your air purifier begins making unusual and loud noises, it generally means there’s a problem. While newer models will likely still be under warranty, a unit that has been in your home for 10 years will have long since passed its warranty expiration. In this situation, it’s generally better to replace your air purifier, as repairs are costly and difficult to arrange.
 The Purifier Isn’t Cleaning the Air Properly Anymore
Of course, the biggest sign that it’s time to get a new air purifier is that your old unit simply isn’t doing a good enough job of cleaning the air anymore. While you should make sure that the problem is with the machine itself and not with the filter, air purifiers are not immune to wearing out. You can check how well your unit is cleaning the air by measuring your indoor air quality with a Foobot meter, which will allow you to get quantifiable data on the contaminants in your home air.
If you’re in the market for a new air purifier, consider one of our excellent residential units. If you aren’t sure what you need, feel free to send us your questions, and we’ll be happy to provide answers and personalized product recommendations based on your needs.