I tested an AirDoctor air purifier for over six months to find out if it's worth the splurge.

Every year when I pull my air conditioner out of storage and reinstall it, I'm worried about whether my window unit managed to survive the colder months. This year when I turned it on, I was worried ...

Add additional filter capacity to a rooftop unit with a Thybar Filter Curb. Each Filter Curb is manufactured to precise specifications and most are shipped fully assembled. Advanced laser technology ...