Skip to content

Search

Blog
About
Contact

Search

★★★★★★★★★★5.0on Google

MM

INCH

Home
Ducting and Fittings

Shop by Part
Spiral Ducting Bends/Elbows Connectors & Spigots Reducers Cap End and Terminals T-Pieces & Y-Pieces Shoes & Saddles Bracketry Access Doors Silencers Roof Flashings

Shop by Size (Metric)
80mm 100mm 125mm 150mm 160mm 180mm 200mm 224mm 250mm 280mm 300mm 315mm 355mm 400mm 450mm 500mm 560mm 600mm 630mm 710mm 800mm 900mm 1,000mm

Shop by Size (Imperial)
3 inch 4 inch 5 inch 6 inch 7 inch 8 inch 9 inch 10 inch 11 inch 12 inch 12½ inch 14 inch 16 inch 18 inch 20 inch 22 inch 24 inch 25 inch 28 inch 32 inch 36 inch 40 inch
Fans

Shop by Type
Cased Axial Fans Plate Fans Inline Fans Box Fans High Temperature Fans Hazardous & ATEX Fans Bifurcated Fans Roof Mounted Fans Residential Fans Speed Controllers Fitting Accessories

Shop by Size (Metric)
100mm 125mm 150mm 160mm 200mm 250mm 315mm 355mm 400mm 450mm 500mm 560mm 630mm 710mm 800mm 900mm 1,000mm

Shop by Size (Imperial)
4 inch 5 inch 6 inch 8 inch 10 inch 12 1/2 inch 14 inch 16 inch 18 inch 20 inch 22 inch 28 inch
Louvres and Grilles

Shop by Type
External Weather Louvres Internal Wall Grilles Internal Ceiling Grilles Linear Bar Grilles Linear Slot Diffusers 4-Way Diffusers Eggcrate Grilles Spiral Grilles Plastic Grille Boxes Steel Grille Boxes

Shop by Neck Size (Metric)
100mm 125mm 150mm 160mm 200mm 250mm 300mm 315mm 350mm 400mm 450mm 500mm 550mm 600mm 650mm 700mm 750mm 800mm 850mm 900mm 950mm 1,000mm Ceiling Grid Replacer

Shop by Neck Size (Imperial)
4 inch 5 inch 6 inch 8 inch 10 inch 12 inch 12 1/2 inch 14 inch 16 inch 18 inch 20 inch 22 inch 24 inch 28 inch 30 inch 36 inch 40 inch
Dampers

Shop by Type
Fire Dampers Fire/Smoke Dampers Single Blade Dampers Multi-Leaf Volume Control Dampers Blast Gate Dampers Non Return Dampers

Shop by Size (Metric)
63mm 80mm 100mm 125mm 150mm 160mm 180mm 200mm 224mm 250mm 280mm 300mm 315mm 355mm 400mm 450mm 500mm 560mm 600mm

Shop by Size (Imperial)
2 1/2 inch 3 inch 4 inch 5 inch 6 inch 7 inch 8 inch 9 inch 10 inch 11 inch 12 inch 12 1/2 inch 14 inch 16 inch 18 inch 20 inch 22 inch 24 inch
Fasteners Fixings and Accessories
Flexible Ducting

Shop by Type
Aluminium Foil Flex Combi Flex Insulated Flex (10m) PVC Grey Flex PU Flex Semi-Rigid Flex High-Temp Silicone Flex Hose Clips

Shop by Size (Metric)
80mm 100mm 125mm 150mm 160mm 180mm 200mm 224mm 250mm 280mm 300mm 315mm 355mm 400mm 450mm 500mm

Shop by Size (Imperial)
3 inch 4 inch 5 inch 6 inch 7 inch 8 inch 9 inch 10 inch 11 inch 12 inch 12 1/2 inch 14 inch 16 inch 18 inch 20 inch
Nordfab QuickFit® Duct

Shop by Part
QF Straight Duct QF Quick Clips QF Bends QF Reducers QF Adaptors QF Branches & Cut Ins QF Dampers QF Accessories

Shop by Size (Metric)
80mm 100mm 125mm 140mm 150mm 160mm 180mm 200mm 224mm 250mm 300mm 315mm 350mm 400mm 450mm 500mm 560mm 630mm 710mm

Shop by Size (Imperial)
3″ 4″ 5″ 5½” 6″ 6¼” 7″ 8″ 9″ 10″ 12″ 12½” 14″ 16″ 18″ 20″ 22″ 24″ 28″
Plastic Ducting

Round Plastic Ducting
Ducting Lengths Bends Tee Pieces Reducers Couplers Ducting Clips Back Draught Shutters Wall Plates

Flat Channel Plastic Ducting
Ducting Lengths Bends Tee Pieces Couplers Ducting Clips Shutters Wall Plates

Transformers & More
Flat-to-Round Transformers All Round Plastic Ducting All Flat Channel Ducting Shop All Plastic Ducting
Filters
Bespoke Rectangular Ducting and Fittings
Help & Info

Contact Us

We’d love to hear from you

Address

72 Cannock Street, Thurmaston, Leicester LE4 9HR

Contact

0116 246 0031
sales@alphaair.co.uk

Opening Hours

Mon – Fri: 08:00 – 17:00

Follow Us

Facebook
LinkedIn
Instagram

Get in Touch

Please enable JavaScript in your browser to complete this form.

Name

Email *

Phone

Comment or Message

Free Delivery on Orders Over £400

Including next day on stock items

Six-Week Returns

No restocking fees on unused items

Expert Support

Call 0116 246 0031 or email us

Secure Checkout

All major cards accepted

Popular Categories

Ducting & Fittings
Flexible Ducting
Fans
Louvres & Grilles
Dampers
Fasteners & Accessories
Filters
Blog
About
Contact

Product Categories

Spiral Ducting & Fittings
Flexible Ducting
Inline Fans
External Louvres
Ceiling Grilles
Fire Dampers
Filters

Useful Links

Blog
About Us
Contact Us

Customer Care

Delivery Information
Returns Policy
Terms & Conditions
Privacy Policy
My Account

Newsletter

Subscribe for HVAC tips, product updates, and exclusive offers.

Please enable JavaScript in your browser to complete this form.

Email *

Follow Us

Facebook
LinkedIn
Instagram

Copyright 2026 Alpha Air Ventilation Supplies Ltd
Registered in England & Wales No. 08447300 · VAT Reg. No. GB 157842481 · Registered office: 72 Cannock Street, Thurmaston, Leicester LE4 9HR

🚚 Calculating delivery... · order within --h --m --s (3pm cutoff, stock items) Delivery times adjusted for upcoming bank holiday Need it sooner? Contact us

Your basket (items: 0)

Products in basket
Product	Details	Total
	Available on back-order Previous price: Discounted price:	Save

Subtotal £0.00

Shipping and taxes calculated at checkout.

Your basket is currently empty!

Notifications