air cleaner service
https://boilerinstallationedge.cloudhinter.com/posts/what-to-know-before-your-boiler-installation
I finally got around to having my air cleaner serviced after noticing it was making a weird rattling sound. The technician came out, replaced the filters, cleaned the coils, and checked the fan motor. It's running so much quieter now, and the air in the house actually feels fresher. I wish I hadn't put it off for so long.