IVC FAQ™ – 3


IVC FAQ™ is a series of questions and answers related to IVC systems and the modern technologies used for laboratory rodent housing systems.


3. Why doesn’t the Lab Products, llc. individually ventilated cage system require the use of exhaust fans and/or exhaust thimbles when connecting the racks to a facility HVAC exhaust system?

The negative pressure Lab Products, llc. rack functions much like a large exhaust thimble, scavenging room air while capturing expelled cage air. The Lab Products, llc. air exhaust system functions totally independently from the air supply system. As the result,  …

Read More
there are a great number of advantages with the Lab Products, llc. ventilated housing systems being directly connected to a facility HVAC exhaust system including:

  • Reliably, removes animal heat, gaseous effluent, odors and allergens from the room.
  • Maintains stability within the cages, even when facility exhaust duct pressure changes. The Lab Products, llc. canopy air exhaust system works similar to that as a thimble.  When the facility exhaust pressure increases, the rack scavenges the additional air from the room.
  • Reduces initial investment cost and offers reduced operating costs, along with reducing heat generation in the room.
  • Exhaust fans are not required. Complex and expensive ceiling mounted air control devices are not required.
  • Racks can be disconnected from the building HVAC exhaust system easier for cage changing or rack washing. No fans to remove. Only a single flex hose needs to be disconnected from each rack.
  • Eliminates the need for electric power usage for the exhaust fan since the fan unit is not required.
  • Electric cords and emergency power requirements are reduced, decreasing construction and operating costs. Extra electrical receptacles for exhaust fans are not required.
  • Simplified and more effective room decontamination process. Besides capturing cage air, at the same time the system scavenges air from the room thereby protecting people and equipment.
  • Reduces the need to clean fans, filters, cords and thimbles in the room during the room decontamination process.
  • Macro (room) and micro (cage) environmental condition improvements.
  • Sound generated from exhaust fans are non-existent.
  • Maintenance costs are reduced since the fan units are not used (filter servicing is eliminated).

Since the Lab Products, llc. system does not require gasket-sealed caging with small exhaust apertures coupled from caging-to-rack (as with other manufacturer’s designs), the pressure difference between the rack and room is very low, almost non- measurable. It is thus more advantageous to connect ventilated housing systems to building ventilation exhaust systems, without additional fans or exhaust air thimble devices. The Lab Products, llc. approach greatly improves the room’s air quality, provides equipment cost savings, provides energy savings, provides labor savings, increases conservation and the well being of animals and personnel, at the same time, all of the time.

Additional questions or comments related to this posting? Please contact us and we’ll be happy to respond.

© 2015 Bio Medic Corporation. IVC FAQ is a trademark of Lab Products, llc.


Our next question:

4. Why aren’t cage gasket seals and filter top cage locks (clamps) required with the Lab Products, llc. ventilated housing systems for mice?

Gasket seals and clamping locks are not needed for our ventilated mouse cages as they would serve no useful purpose and add cost. Seals and clamps may be needed for ventilated cage designs that lack the ability to …

Come back next for the answer to this question.

© 2015 Bio Medic Corporation.


Comments are closed.