General Guidelines
Application | T.D. | Coil | Notes |
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Convenience Store | 10 - 15ºF. | Low Silhouette | Multiple units for adequate air coverage |
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| Up to 18’ long = 1 coil |
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| Up to 30’ long = 2 coils |
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| Up to 40’ long = 3 coils |
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| Estimating guide: Cooler 100 SF/ton* |
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| Freezer 75 SF/ton* |
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Holding Warehouse | 10 - 15ºF. | Medium or | Forklift Operation |
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| Heavy Duty | Average air changes |
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| Product load 10 - 15% of total load |
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| Estimating guide: 200 - 300 SF/ton |
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Produce Warehouse | 7 | Low Velocity | High seasonal loads |
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| Medium | Heavy product respiration |
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| or Heavy Duty | Additional humidity may be required |
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| Estimating guide: 150 - 200 SF/ton |
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Blast Cooler or Freezer | 7 - 10ºF. | Heavy Duty | High air velocity, heavy infiltration |
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| Fast defrost |
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| Product spaced to allow air circulation |
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| Equipment sized to extract all interior heat |
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| Box temp below desired product temperature |
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| Multiple units to provide capacity control |
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| 1.5 safety factor sometimes applied to handle |
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| initial high rate of product heat evolution |
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Ice Cream Hardening | 10ºF. | Heavy Duty | 10 hour pull down with product 30% frozen and a |
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| certain percentage over run |
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| (thickness of ice cream) |
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Controlled Temperature | 15 - 20ºF. | Heavy Duty | Floating box temperature |
Beer Warehouse |
|
| average monthly dew point |
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| Auxiliary air circulation may be required due to |
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| high T.D. |
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| Heavy loading - high infiltration |
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| 20 - 30ºF. pull down on beer |
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Candy Warehouse | 20 - 25ºF. | Heavy Duty | Low relative humidity |
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| Auxiliary air circulation and reheat may be required |
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| Vapor barrier essential |
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Prep Room | 20ºF. | Low Velocity | Heavy motor and personnel load |
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| Estimating guide: 150 SF/ton |
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Floral Box | 8ºF. | Low Velocity | Light loading conditions |
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| Glass Walls |
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| Estimating guide 100 SF/ton* |
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SF = Floor Square Foot ton = 12,000 BTUH |
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Note: Estimating guide ball park figures only. All attempts should be made to obtain accurate job survey and subsequent refrigeration calculations.
* Glass doors assumed on one long wall only
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