Total Cost of Ownership

How does the cost to own and operate the various classes of Type II BSCs compare?

Since the Type C1 has the ability to exhaust back into the laboratory like an A2, or the adaptability to be ducted for single-pass exhaust from the center of its work surface like a B2, It can be easily compared to both of these common BSC classes.

Energy Efficiency

In terms of electrical power usage and the loss of conditioned air, the most energy efficient way to operate a BSC is to return the exhaust air back into the laboratory. However, returning the air to the room is not acceptable when your application involves volatile toxic chemicals, odors or radionuclides.

When a Type C1 cabinet is exhausting back into the room, it consumes the same energy as any energy-efficient A2 cabinet that utilizes ECM blower motors.

  • Energy savings is readily apparent in the Type C1 when used in an application that requires ducting the exhaust to the outside. In terms of removing heated or cooled air from the building, the Type C1 exhausts similar air volumes as do Type B1s and A2s. These cabinets remove 50% less air than does a Type B2. Employing any one of them will reduce operating cost by half.
  • The “green” design intent for the Type C is to permit the facility manager along with the research managers to optimize energy savings and allow the Type C to run in ‘A-mode’. This is done by disconnecting Type C cabinets from exhaust ducts where possible. Applications change; why not employ a biosafety cabinet that can adapt?

Reduced construction and installation costs

A further comparison with Type B1 or Type B2 cabinets reveals the potential for greatly reduced expenses in design and construction. The Type C1 is capable of being connected to typical ganged laboratory exhaust systems thereby eliminating the need for additional dedicated duct and blower systems. The savings comprised of consulting services, utility space, heavy ducting, exhaust blower, installation, wiring and roof penetrations are substantial.

by Brian Garrett
LEED Green Associate, Product Manager