Cool FAQs

Cool FAQs

Use our Cool frequently asked questions to help find the answer to your question. Select a topic below to get started.

Horizontal Tabs


Can my existing passive cabinet containment be converted to the ActiveAir system?

Yes, we have conversion kits available for many existing systems, and can create a tailor made conversion kit as needed.

Is an active rack containment system much more expensive than a passive one?

No it’s not.  Very often, a single ActiveAir system can be used to exhaust heat from 2-3 cabinets at a time which provides a very competitive price to passive while giving you control and monitoring features that passive solutions can’t.

How much more power will I need to utilize an active system?

An ActiveAir system only requires 200-300 watts per system, and therefore can utilize power provided by the A and B PDUs.

What trades are required for installation?

The units are very simple to install and can be completed in a couple hours.  Since they plug into a standard receptacle and because they don’t effect the mechanical workings of HVAC systems generally no licensed tradesmen are required.

Do cabinets need to be arranged in a certain pattern?

One of the biggest benefits to ActiveAir is that it doesn’t require cabinet to be in a straight even row.  Each cabinet can be dealt with individually.  If the exhaust of one cabinet points to the intake of another we don’t care.  The hot air is captured from the server exhaust and handled properly.

Do I need special doors that aren’t vented for this system to work?

No, the conversion kit includes rear door blanking material that converts vented doors to non-vented requiring only a few minutes per door.


How much load can one unit handle?

The units are rated at 1100 CFM.  Typically IT equipment requires 110 CFM of air per Kilowatt of load.  If cabinet exhaust is properly sectioned off, IT loads in the range of 10 kW can be serviced.

How is the unit mounted in the ceiling?

The ClosetAir system is designed to drop into a standard 24” x 24” ceiling tile opening.  The unit utilizes tabs for attaching hanger wire for support.

Do I need a licensed tradesman to install this unit?

Not in most cases. Since the unit is designed to be powered by a standard wall outlet and does not require changes to the cooling system, installation is very simple.  However, it is always best to check with local codes to be safe.

Does the system work in a low density environment?

Yes, the fans will respond to the conditions of the room and fluctuate in speed. It is recommended that temperature sensors be placed on the intake of the server racks. When conditions reach a predefined point the fans will adjust accordingly.

Is the system networkable?

Yes, the unit is fully configurable over the network.  Temperature set-points, alarms, email alerts, current and historic conditions can be accessed through the web interface.

Is the system compatible with my DCIM package?

Yes, the ClosetAir system is capable of sending SNMP traps and can be pulled using the included MIB file for setup.

Is it possible to channel the exhaust heat to a return duct?

Yes, the unit can be purchased with an optional round duct adapter that can connect with rigid or flexible ducting.

Is it a requirement to control speed based on temperatures?

No, the web interface also allows users to set fan speed to a constant fan speed.

Is the ClosetAir system capable of working outdoors?

The unit is designed for indoor use only.

Is the system compatible with my email server?

The ClosetAir system will work with POP3/SMTP, email relay/no authentication, ESMTP/TLS/SSL email set ups.


Will Geist SwitchAir work to cool network switch model ______?

Geist offers a variety of SwitchAir configurations to fit most switch models. Check our SwitchAir Finder or talk with a sales representative.

How does Geist SwitchAir work to keep my switches from overheating?

Geist’s SwitchAir creates a barrier between switch air intakes and hot exhaust air in the back of server racks, while also guiding cool air from the cold aisle to the switch intakes.

What is the difference between Passive and Active SwitchAir devices?

The Passive SwitchAir product works by simply creating a channel for cold air to flow to switch intakes. The Active SwitchAir product works in a similar fashion, but use fans to force cold air through the channel.

Will there be downtime while installing the SwitchAir product?

In most cases, you will be able to install the SwitchAir product in your rack without unplugging your network switches.