Original price was: £315.34.£252.27Current price is: £252.27. £302.72 incl. VAT
On Backorder
As Zehnder has lauched a new, much more efficient version of their ComfoTube, we are happy to offer their high-quality ducting system.
Semi-rigid ducting, 90mm outer dia./ 77mm inner dia., 50m coil, white.
If the space is allowing it, we prefer the 90mm semi-rigid ducting system over the 75mm ducting system as it allows for slower air velocity, which reduces energy cost and noise and/or fewer ducts are needed for an installation.
Please note, this item has 3-4 working days delivery time. If it is needed more urgently, additional delivery charges apply.
For most items our delivery charge is £5.94+VAT. Orders to over £250.00+VAT are free of delivery charges. Different charges apply for for Northern Ireland (£13.13+VAT), the isles (£15.02+VAT) and Scottish Highlands (£17.68+VAT) with free delivery of orders over £450.00+VAT.
We ususally deliver stocked items within 2-3 days. For urgent orders, please call us on 01383 221 255 to check stock levels.
We can only process orders to the UK (with UK/ EU payment cards). We never ask for your card details, but we re-direct to Take Payments, our secure payment gateway.
| Size | 91 mm outer diameter; 77 mm inner diameter |
| Material | PE, inside with anti-static and anti-bacterial additives |
| Air volume flow rate | max. 45 m3/h |
| Bend radius | ≥ 150 mm |
| Permissible temperatures | Perm. operating temperature from -25 °C to 60 °C Installation temperature no less than -5 °C |
| Ring stiffness | ≥ 8 kN/m2 acc. to EN ISO 9969 |
| Coil | Length: 50 m; Size: 1,180 x 410 mm; Weight: 20 kg |
Recommended maximum length of ducting in relation to the air flow rates per room terminal:
| m3/h | l/s | 1x O90 duct Single plenum |
2x O90 ducts Double plenum |
| 20 | 5.6 | max. 28 m | |
| 25 | 6.9 | max. 20 m | |
| 30 | 8.3 | max. 14 m | max. 40 m |
| 35 | 9.7 | max. 10 m | max. 35 m |
| 40 | 11.1 | max. 7 m | max. 28 m |
| 45 | 12.5 | max. 24 m | |
| 50 | 13.9 | max. 20 m | |
| 55 | 15.3 | max. 17 m | |
| 60 | 16.7 | max. 14 m | |
Please note, we have tried and tested different semi-rigid products and have noticed a considerable difference in quality and performance. Most products failed our requirements for durability and efficiency due to either brittle inner lining, creasing when bent or a rough and too corrugated inner surface. Our semi-rigid duct, however, has a much smoother inner lining without being corrugated and therefore has a better air flow performance.
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