Replace cooling pads when they are clogged with scale, sagging, crumbling, smelly after cleaning, or no longer wet evenly. Measure the old pad's height, width and thickness, note the flute grade, and fit the new pad the right way up with the water distributor above it.
Signs your pads need replacing
- White or brown crust that does not flush off: mineral scale blocking the flutes
- Dry streaks even with the pump running well
- Sagging, soft or crumbling edges
- A musty smell that returns soon after cleaning the tank
- Weaker airflow or warmer air than last season
- Visible holes or gaps where air bypasses the pad
Clean first, then decide
Light dust and algae can be flushed off with clean water at low pressure. If the pad is hard with scale or losing its shape, cleaning will not bring it back.
How to measure for new pads
- Height × width of the pad, in mm
- Thickness: 60, 100 or 150 mm
- Grade: 7090 or 5090, if you know it
- Quantity: coolers with pads on four sides need four
Our duct cooler pad sizes, for reference:
| Cooler | Pad size |
|---|---|
| 18,000 CMH | 670 × 770 × 100 mm |
| 22,000 and 25,000 CMH | 880 × 790 × 100 mm |
| 30,000 CMH | 870 × 870 × 100 mm |
For other brands or pad walls, send us the measurements or a photo.
Replacing pads in an air cooler
- Switch off and isolate the cooler
- Drain the tank
- Remove the pad frame or louvre panel
- Slide out the old pad and clean the frame and distribution pipe holes
- Fit the new pad in the same orientation as the old one
- Refit the panel, fill the tank and run the pump for a few minutes before starting the fan
- Check the whole face wets evenly
Replacing pads in a poultry or greenhouse wall
Work one section at a time. Remove the top cover and distribution pipe, lift out the old pads, clean the gutter and pipe, then seat the new pads tightly together so no air leaks between them.
Making new pads last
Use a filter net, keep the water clean, drain the tank regularly and avoid running the fan on dry pads in dusty conditions. See the cooling pads guide.
Ordering
We make cellulose cooling pads in 7090 and 5090 grades, cut to size.
Frequently asked questions
How often should cooling pads be replaced?
When they are scaled, sagging or no longer wet evenly. With clean water and care they last several seasons.
Can cooling pads be cleaned instead of replaced?
Light dirt can be flushed off gently; heavy scale or damage means replacement.
What size cooling pad do I need?
Measure the old pad's height, width and thickness in mm and tell us the cooler model.