5090 vs 6090 vs 7090 cellulose cooling pads: flute geometry, pressure drop, and climate selection
Guide for pad flutes 5090, 6090, 7090, and 7060: geometry, thickness (100/150/200 mm), and climate fit. Ratings are confirmed on the quotation.
This is a selection / climate decision guide for cellulose evaporative cooling pads on tunnel inlets. It builds on the shorter grade overview — 5090 vs 6090 vs 7090 evaporative cooling pads — and helps you name flute code and thickness before you inquire. Product catalogue and materials live on the cooling pads page.
“Pressure drop” in the title is the engineering topic buyers ask about. This public site does <strong>not</strong> publish Pa (static-pressure) curves or saturation-efficiency % tables. Catalogue geometry is on the cooling-pads page; ratings for your face velocity are on the written quotation.
Where pads sit in the system
In a poultry house tunnel ventilation system, evaporative cooling pads sit on the inlet end; exhaust fans pull air the length of the house. Quote pads to opening, climate, and water quality. On dark-out houses, light traps belong at the fan end — not on the cooling-pad face.
How to read the four-digit flute code
On cellulose pads, the four-digit code is flute height plus the two crossing flute angles. The first two digits are height: 50 = 5 mm, 60 = 6 mm, 70 = 7 mm. The last two digits are the angle sum: 90 (commonly 45°/45° or 60°/30°) or 60 (commonly 45°/15°, as in 7060). Name the code on the inquiry. Plastic honeycomb pads do not use these paper codes.
- 5090 — 5 mm flute, angle sum 90
- 6090 — 6 mm flute, angle sum 90
- 7090 — 7 mm flute, angle sum 90
- 7060 — 7 mm flute, angle sum 60
Selection comparison
Relative engineering trends only. Confirm ratings on quotation.
| Dimension | 5090 | 6090 | 7090 | 7060 |
|---|---|---|---|---|
| Flute code | 5 mm height, angle sum 90 | 6 mm height, angle sum 90 | 7 mm height, angle sum 90 | 7 mm height, angle sum 60 |
| Thickness options | On the cooling-pads page / grade overview: 100 mm, 150 mm, and 200 mm. Name thickness with the flute code on the inquiry. | |||
| Pressure-drop trend | Finer flutes and thicker packs generally raise air-path resistance relative to coarser, thinner packs — but this site publishes no Pa table. Match pad resistance with fan selection on the written quotation for your face velocity. | |||
| Cooling / wetting trend | Grade and thickness change contact path and wetting geometry. Saturation efficiency % is not published here; it belongs on the quotation for your climate and face velocity. Grade is not chosen from a published saturation table. | |||
| Climate / water fit | Quote to opening, climate, and water quality (poultry and greenhouse use are both in scope on this site). Hard water, dust load, and wash-down practice affect which cellulose grade and whether flame-retardant cellulose is named. | |||
| Cellulose vs plastic | Use cellulose for the cooling inlet. Plastic honeycomb is mainly for odor-control / exhaust-air wash walls (or where paper would not survive the water) and does not use 5090/6090/7090 paper codes. Plastic pads are not the main cooling pad on this site. | |||
Frame and opening size
Pads are made to the height and width of the inlet opening, not sold as a one-size kit. Frames are aluminum or galvanized, and rodent mesh is optional. Name the opening size with the flute code and thickness.
How to choose cooling pad thickness: 100, 150 or 200 mm
Cellulose pads on the cooling pads page are offered at three thicknesses, 100, 150 and 200 mm, each as quoted. Pick the thickness together with the flute code and the inlet opening rather than on its own; the three choices together define the pad wall for one house.
As the comparison table above notes, a thicker pack generally gives the air a longer wetted contact path but also adds resistance, so pad thickness is balanced against the exhaust fans chosen for the same house. This site does not publish saturation or pressure-drop figures by thickness. Your quotation states them for the actual opening and face velocity.
For a new house, thickness is usually fixed at the same time as fan selection. For a retrofit, tell us the thickness and frame you have now, so replacement pads fit the existing wall or a change is planned on purpose.
What to state for thickness selection
- Preferred thickness (100, 150 or 200 mm), or ask for a recommendation
- Flute code, or say you are not sure
- Opening height and width, and how many pad walls
- Country, climate and water quality
- New house or retrofit; for a retrofit, current pad thickness and frame type
Decision tree before you email
- Confirm duty: tunnel cooling inlet (cellulose) vs odor / wash wall (plastic).
- Name flute code: 5090, 6090, 7090, or 7060 — using height + angle-sum rules above.
- Name thickness: 100 mm, 150 mm, or 200 mm (options on the cooling-pads / grade pages).
- Send opening, climate, water quality, and house type so saturation and pressure-drop ratings can be set on the quotation — not guessed from this page.
FAQ
What is 7090 / 6090 / 5090?
The four-digit code on cellulose pads is flute height plus the two crossing flute angles. The first two digits are height: 50 = 5 mm, 60 = 6 mm, 70 = 7 mm. The last two digits are the angle sum: 90 (commonly 45°/45° or 60°/30°) or 60 (commonly 45°/15°, as in 7060). Name the code on the inquiry. Plastic honeycomb pads do not use these paper codes.
Do you publish saturation tables?
Catalogue geometry is on the cooling-pads page. Ratings for your face velocity are on the written quotation.
Can plastic pads cool like paper pads?
No. Specify cellulose for evaporative cooling. Plastic pads are not the main cooling pad on this site.