Cellulose cooling pads, also called honeycomb cooling pads, are corrugated sheets of treated kraft paper glued into blocks. Water running down them wets a large surface, and air passing through is cooled by evaporation. Choose the grade and thickness for your fans and use, and keep the water clean to make them last.
How a cellulose pad is made
Kraft paper is corrugated into flutes, treated with resin so it stays strong when wet, and glued in alternating directions to form a rigid honeycomb block. We make pads on our own production line at MIDC Murbad, near Mumbai.
Grades: 7090 and 5090
The two grades have different flute angles, which change how air and water move through the pad. We make both. Tell us the use (cooler, poultry house, greenhouse) and fan airflow and we will advise which suits it.
Flute height
Our pads come with 5, 6 or 7 mm flutes. Flute size affects the wet surface area and how easily air flows through.
Thickness: 100 mm or 150 mm
| Thickness | Typical use | Face velocity |
|---|---|---|
| 100 mm | Industrial air coolers, smaller pad walls | About 1.25 m/s |
| 150 mm | Poultry and greenhouse pad walls | About 1.8 m/s |
A thicker pad gives the air more time in contact with water, so it can take a higher air speed while still cooling well. All our duct coolers use 100 mm pads.
What good pads do
- Cooling efficiency above 80%
- Fast, even wetting: on our pads a drop of water spreads across the surface in 4 to 5 seconds
- Rigid structure that does not sag when wet
- Optional anti-bacterial formula
What shortens pad life
- Hard water: minerals left behind as water evaporates form scale
- Dirty water and algae: clog the flutes
- Running dry and wet repeatedly in strong sun
- Dust and leaves without a filter net
- Too much water pressure, which can wash out the surface
How to make pads last
- Fit a filter net in front of the pads
- Bleed off and refill water regularly, and use a drain valve
- Clean the tank and pump at the start and end of the season
- Keep wetting even: check the pump and distribution pipe
- Flush pads gently with clean water; do not scrub or pressure-wash
With clean water and regular care, pads last several seasons.
Colours and coatings
Pads come in brown, biscuit and green-brown, or with one side black coated, which is common on the outside face of poultry and greenhouse walls.
See cellulose cooling pads and pad framing.
Frequently asked questions
What is the difference between 7090 and 5090 cooling pads?
They have different flute angles. We make both and advise which suits your fans and use.
Should I use 100 mm or 150 mm cooling pads?
100 mm pads are used in industrial coolers and smaller walls; 150 mm pads are common in poultry and greenhouse pad walls.
How long do cellulose cooling pads last?
Several seasons with clean water, a filter net and regular cleaning; hard or dirty water shortens their life.
What is the HSN code for cellulose cooling pads?
We invoice them under HSN 4823 90 90.