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Calculated U-values · k ≈ 0.022 W/mK

Which thickness for which temperature?

The colder the room and the hotter the site, the thicker the core. These are typical choices across Indian cold-chain projects. Your refrigeration designer has the final word.

Quick answer

What thickness of PUF panel do I need?

Typical choices: 30–50 mm for ambient sheds and cabins, 80–100 mm for chillers at +2 to +8 °C, 120–150 mm for freezers at −18 to −25 °C and 150–200 mm for blast freezers. Go thicker in hot regions, for frequent door openings or where power is expensive.

Chiller
80–100 mm
Freezer
120–150 mm
Blast freezer
150–200 mm
U at 100 mm
≈ 0.21 W/m²K

Full explanation with worked heat-gain examples: PUF panel thickness by temperature.

Try it

Pick your room

Core thickness
100mm
U-value (calculated)
0.21W/m²K
What temperature is the room?
Heat through each m² at a 30 °C difference
6.4 W
Typical for chiller
80–100 mm
Get rate for 100 mm Full guide

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U = 1 / (0.13 + d/0.022 + 0.04), core only, k ≈ 0.022 W/mK (typical; varies by brand). Typical uses: Dairy, fruit and vegetables, flowers, vaccines.

Thickness in inches, room in feet?Convert mm ↔ in, ft ↔ m and more, with the formula shown.
Feet
Metres3.658m
Formula

Metres = Feet × 0.3048

12 ft × 0.3048 = 3.658 m

1 ft = 0.3048 m (exact)

All conversions, room area and the formula card

Recommendation table

Typical thickness by room temperature

Go thicker in hot regions (Rajasthan, Gujarat, central India summers), for rooms with frequent door openings, or where power is expensive. Rooms below 0 °C also need floor insulation.

Large modern warehouse clad in insulated metal panels30–50 mmAmbient

Ambient shed / cabin

Common pick
50 mm
U at pick
0.41 W/m²K

Warehouse roofs, site offices, farm stores

Clean room with flush panel walls and a view window50–80 mm+18 to +25 °C

AC room / clean room

Common pick
60 mm
U at pick
0.35 W/m²K

Clean rooms, packing halls, server and battery rooms

Banana ripening chambers built with insulated panels60–100 mm+12 to +20 °C

Ripening / mushroom

Common pick
80 mm
U at pick
0.26 W/m²K

Banana and mango ripening, mushroom growing rooms

Cold store with white insulated panel walls and trolleys80–100 mm+2 to +8 °C

Chiller

Common pick
100 mm
U at pick
0.21 W/m²K

Dairy, fruit and vegetables, flowers, vaccines

Frosted apple on a shelf in cold storage100–120 mm−5 to 0 °C

Zero / near-freezing

Common pick
100 mm
U at pick
0.21 W/m²K

Meat and fish chill, CA stores

Frost on boxes inside a freezer120–150 mm−18 to −25 °C

Freezer

Common pick
150 mm
U at pick
0.143 W/m²K

Frozen foods, ice cream, frozen storage

Modular walk-in cold room built from insulated panels150–200 mm−35 to −40 °C

Blast freezer

Common pick
200 mm
U at pick
0.108 W/m²K

Blast freezing, IQF, deep-frozen pharma

U-value chart

Heat through one square metre

U is the heat flow in watts per square metre for each degree of temperature difference. Doubling the core roughly halves the heat gain through the panel.

  • U = 1 / (Rsi + d/k + Rse)Rsi = 0.13, Rse = 0.04 m²K/W, k = 0.022 W/mK (PUF/PIR, typical)
  • Heat gain Q = U × A × ΔTArea in m², ΔT = outside minus inside temperature
  • Example: 100 mm wallU ≈ 0.21; at 35 °C outside and 2 °C inside, about 7.0 W through every m²
30 mm0.65
40 mm0.50
50 mm0.41
60 mm0.35
80 mm0.26
100 mm0.21
120 mm0.178
150 mm0.143
200 mm0.108

Core only, W/m²K. Typical; varies by brand and density. Work out your quantity

Not sure which thickness?

Tell us the room temperature, size and city. We recommend a thickness and give the panel rate across brands.

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Transport extraFlashing as per your requirement