What is a curb in HVAC?

What is a curb in HVAC?

In the context of HVAC RTUs, a curb is a device used for mounting one of these heavy systems on a rooftop. The curb creates an opening in a roof, separating the roofing material and providing structural support for the equipment that will sit on it.

What is a vent curb?

A Roof Curb is a metal frame used as a platform for mounting a roof vent or fan. As a result, this platform will provide additional height allowing for installation in all climate zones. Proper installation ensures that the accessory has a level platform for attachment.

What is mechanical roof curb?

Roof curbs are frames used to secure mechanical equipment such as air conditioning units, skylights, or exhaust fans to your roof. A roof curb, like this one manufactured by Lloyd Industries, helps support the weight of the mechanical unit and allows for contractors to gain more convenient access to the ductwork.

What is the purpose of roof curb?

The primary function of the curb is to keep weather out while supporting/flashing the equipment on it. Prefabricated roof curbs have been in use since the roof has been utilized for something other than keeping weather out.

How does curb adapter work?

Curb Adapters are designed to properly seat a new (RTU), then redirect the new supply & return openings to match the duct work fastened to the existing curb.

What is RTU curb?

A roof curb is a raised frame installed on commercial roof surfaces for the purpose of elevating mechanical equipment, such as an HVAC roof top unit or RTU. This roof curb also supports and allows for roof penetration of the supply and return duct work from the installed roof top unit into the building.

What is base and curb?

A curb is basically a metal box for the exhaust fan to sit on. It may look simple, but it plays a very important role in your ventilation system. The curb sits between the roof and the fan base and is designed to provide a watertight, weatherproof connection that will protect the interior of your ventilation system.

What is a fan curb?

Fan curbs are used as roof support structures for fans and ventilators. Like our HVAC Curbs, they are available for flat, pitched, and metal or ridged roofs with or without insulation. Fan curbs can be either canted or self flashing.

What are roof curbs made of?

Because roof curbs need to be strong enough to support potentially thousands of pounds of industrial equipment, they’re often composed using galvanized steel of at least 14-gauge thickness. Roof curbs are manufactured by numerous companies both international and domestic.

What is a curb on a HVAC system?

HVAC curbs provide structural support for rooftop AC units and other roof-mounted equipment. They also serve as a location for roof penetration to allow cooled air to flow into the building and return air to flow out.

Do all HVAC rooftop units have the same curb layouts?

Nearly every HVAC manufacturer uses different roof curb layouts specific to their HVAC rooftop units. Most manufacturers will strive to keep the same cabinet height, width, and length dimensions, as well as the precise positioning of supply air and return air opening located on the bottom of their RTU.

What to do with an RTU with an existing roof curb?

The building owner is faced with one of two decisions… remove the unit, and the existing unit’s roof curb, install a new curb, transition the duct work to attach to the new curb, and set the new RTU in place.

What materials are used to make the curb system?

All curb systems are subjected to SolidWorks Simulation load testing prior to fabrication accommodating RTU/AHU and all accessories weight and center of gravity insuring a minimum 90% isolation efficiency. 18-12ga Prime G-90 galvanized steel Fully welded and mitered seams and corners Weather skirt and bulb seal insure water tight seal