HVAC Condensate Management: How to prevent the flood
In this article we will go in depth to discuss what condensate management is, what the most common condensate management devices are, and diagram some of the normal HVAC installation set ups. If you need someone to inspect your current system, please call 478-953-3041 and we will be happy to send one of our technicians!
In HVAC systems, condensate management is critical because water can cause significant damage when it leaks into unintended areas. The HVAC equipment, whether it be located in an attic, basement, closet, or crawlspace is where the condensation is created and the starting point of the condensate management system. It ends when the condensate water is disposed of in a way that won't damage inside your home or the equipment. A successful condensate management system may include electronic and electrical safety switches that detect condensate backing up in clogged drains or on surfaces and momentarily turn off equipment. We will break down some of those devices next!
Types of condensate management devices
- Drain Pan: Most HVAC systems will have a primary and secondary drain pan. The primary drain pan is located under the evaporator coil in the air handler, while the secondary drain pan is located on the outside and beneath the air handler. The secondary drain pan is only used if water backs up and overflows the primary pan.
- Condensate Pump: A condensate pump is used when an application does not allow for a gravity drain. It pumps the condensate through a tube to a safe location.
- Primary Drain Switch: A primary drain switch is a device that is used to turn off the power to your air conditioning system if it senses water building up in the primary drain line.
- Flood Detection Switch: Sometimes referred to as a “pan switch,” the flood detection switch has the ability to turn off the HVAC system if it senses water building up in the secondary drain pan.
Types of installations and condensate management devices
One of the most common types of HVAC installations is the horizontal air handler in the attic. In most cases, a primary drain switch, a secondary drain pan, and a flood detection switch can be installed.
A vertical installation could be used in an attic or crawlspace but is most commonly found in a garage or closet. It’s common to use a condensate pump with these applications due to the inability to drain the water using gravity.
A bottom intake with gravity drain is most commonly found in closets inside your home. A primary drain switch, drain trap, and flood detection switch are all common devices used with this installation to prevent flooding.
No matter what type of HVAC system you have, it’s important to have your condensate line routinely inspected and cleaned to avoid a build of debris! This is a major checkpoint on the list of things Speir Heating & Air does during a maintenance visit. To have one of our certified HVAC technicians inspect your system, click or call 478-953-3041 to schedule an appointment!