I'm not sure who first started calling evaporator coil odors “dirty sock syndrome,” but I really wish they hadn't. Nowadays, every tech out there can't help but categorize every odor from the system as “dirty sock syndrome,” and customers just LOVE to hear that they have a “syndrome” named after a dirty locker room smell. […]

If you work in large commercial offices or mixed-use buildings, you almost certainly work with VAV systems regularly. If you aren't familiar with VAV, this is a quick intro to the basics so that they won't seem so overwhelming. VAV stands for variable air volume; this means that the AHU (air handling unit) can vary […]

Most controls and thermostats will have some sort of cycle rate per hour setting that kicks in to prevent over-cycling once the setpoint is reached. These cycle settings don't kick in until the system starts achieving setpoint, so don't worry if it will shut off if it's set to 70° in heat mode and it's […]