Adding a Mini Split AC System in Indiana (2026 Guide)
We set a particle counter in a Hamilton County bonus room the week after a ductless head went in. Outdoor PM2.5 read 22 micrograms per cubic meter. Inside that room, with the furnace blower off, we logged 19. Three rooms away, where the central system still pulled air through a MERV 13, it read 6. … Read more