Hello everybody,
we have project of a medium size food supermarket. Two cold boxes and one freeze box are used for temporary storage of food. The boxes are cca 200 - 500 sf each and they are non-regularly occupied as the employees go there for a minutes only and they are not accessible for customers (but they could not be considered as non-occupied regarding the definition of IEQ matrix).
Should these rooms be ventilated? (It looks as nonsens because of cold losses).
Thank you for any hint.
Regards
Frantisek
Dave Hubka
Practice Leader - SustainabilityEUA
LEEDuser Expert
494 thumbs up
October 26, 2017 - 8:04 am
per LEED Interpretation #10423 "frozen cold storage areas conditioned below 32 °F (0 °C) do not need to meet ASHRAE 62.1 for the purposes of the Minimum Indoor Air Quality Prerequisite. This exception is not allowed for cold storage areas that can be adjusted from below 32 °F (0 °C) to above 32 °F (0 °C). It is also not allowed if combustion equipment (such as gas-operated forklifts) is operated in the space."
Non-regularly occupied rooms that have a temperature of 0 degrees C or above must adhere to the ventilation requirements of ASHRAE 62.1. (Storage rooms where daily retrieval of material is expected are considered to be non-regularly occupied.)
It sounds like you'll need to ventilate the 'cold box' (i.e. cooler) but not the 'freeze box' (i.e. freezer).
We have a factory with a very large room that is kept at 5 degrees C.
In this instance we are pursuing LEED Pilot Credit #68 in lieu of ventilating per ASHRAE 62.1.
Here is the link to the Pilot Credit language: https://www.usgbc.org/credits/new-construction-retail-new-construction-c...
Good Luck!
Frantisek Macholda
Sustainability ConsultantEkoWATT
October 27, 2017 - 5:59 am
Dear David, thank you very much! It is very helpful comment for our poject.