Apply 220.56 kitchen equip. demand factor to walk-in cooler/freezer

[designer82]

I'm working on a supermarket project that has a bunch of walk-in coolers/freezers for storage and clear glass displays.

Would you apply 220.56 kitchen equipment demand to the above or just go conservative and use 100% demand?

Thanks

 

[Buck Parrish]

I can see why you'd ask. They seem like they're running all the time.

I would go by the table . It might be the minimum. But MH once said '' It's not wrong." He said , "those of you using bigger conductors thinking your doing a better job. You don't need to. "

Table 220.56 Demand Factors for Kitchen Equipment - Other Than Dwelling Unit(s)

Number of Units of Equipment	Demand Factor (%)
1	100
2	100
3	90
4	80
5	70
6 and over	65

 

[MyCleveland]

I'm working on a supermarket project that has a bunch of walk-in coolers/freezers for storage and clear glass displays.

Would you apply 220.56 kitchen equipment demand to the above or just go conservative and use 100% demand?

Thanks

I would only use that table for a Kitchen area where they are cooking up or preparing pre-cooked items for sale. Your store may or may not have one. I have done a few where one store has a Meal Kitchen and Bakery Kitchen where they prepare foods for multiple other branch stores. This is where your 220.56 table would kick-in.

Regarding the refrigeration, is the refrigeration equipment not centralized? Then you are left with small loads (fans) + lighting at each individual cooler or freezer. Lean on the refrigeration system designer for guidance.

 

[retirede]

It sounds like the typical supermarket that has been constructed times thousands over the past 50 years. Surely there are existing Engineering design criteria for such things.

 

[Paul_Briganti]

T220.56 deals with demand factors for commercial cooking equipment; the reference offers examples that might be found in a kitchen. I don't think the intent here was to include walk-in coolers/freezers for storage and clear glass displays when you first do not have a "kitchen." The last sentence in the first paragraph states, "These demand factors shall not apply to space-heating, ventilating, or air-conditioning equipment." The R in HVAC/R for refrigeration would go along with air-conditioning.