Original price was: £347.28.£277.82Current price is: £277.82. £333.38 incl. VAT
In Stock
Semi-rigid ducting, 90mm outer dia./ 78mm inner dia., 50m coil, light-grey.
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.
For most items our delivery charge is £7.48+VAT. Orders over £180.00 are free of delivery charges.
We ususally deliver stocked items within 1-3 days.
Unfortunately, we can only process orders from Scotland, England and Wales (with UK/ EU payment cards).
Please note that PAUL Heat Recovery will not ask for your card details, but we re-direct to Take Payments, our secure payment gateway.
| Size | 91 mm outer diameter; 78 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. 43 m | |
| 25 | 6.9 | max. 30 m | |
| 30 | 8.3 | max. 21 m | max. 60 m |
| 35 | 9.7 | max. 15 m | max. 50 m |
| 40 | 11.1 | max. 11 m | max. 43 m |
| 45 | 12.5 | max. 8 m | max. 36 m |
| 50 | 13.9 | max. 30 m | |
| 55 | 15.3 | max. 25 m | |
| 60 | 16.7 | max. 21 m | |
| 65 | 18.1 | max. 18 m |
Please note, we have tried and tested different semi-rigid products and have noticed a considerable difference in quality and performance. We consider this product as superior to many others (including the Zehnder ComfoTube 90mm). 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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01383 221 255
info@paulheatrecovery.co.uk
© 2024
Sustainable Homes Scotland Ltd
t/a PAUL Heat Recovery
Unit D, Pitreavie Business Park
Pitreavie Crescent, Dunfermline
KY11 8PU Scotland
Registered in Scotland – CRN: SC331209
Directors: Stefan Huber, Allan McEwan, Garrie Glasgow
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