4 Inch Insulated Flexible Duct

4 inch insulated flexible duct is 4 inch insulated flexible duct with an inner core, insulation layer and outer jacket.

It suits supply air and cooled air where condensation and heat gain must be controlled.

What is a 4 inch insulated flexible duct?

Flexible duct is round ducting made from a wire helix with foil or plastic layers. It makes short, quick connections between rigid ducts and diffusers, grilles, fans and fan coil units.

Insulated flexible duct has an insulation layer and an outer jacket, so it stops condensation and heat gain on cooled air. Non-insulated duct suits extract and exhaust air. Therefore, choose the type by the air it carries.

Key terms explained

Wire helix

The spring wire that holds the duct round.

Insulated flexible duct

Flexible duct with insulation and a vapour barrier jacket.

Spigot

A short round collar the duct slides over.

Static pressure

Resistance to airflow in a duct system.

Features and benefits

• Quick connections to diffusers.
• Insulated and non-insulated types.
• Sizes from 4 to 14 inch.
• Bends around obstacles.

Technical specifications

Sizes, grades and ratings depend on stock and model. Tell us what you need, and we will confirm before you order.

Applications of a 4 inch insulated flexible duct

1. Ceiling diffusers. Final connections.
2. Fan coil units. Supply and return.
3. Bathroom extract. Inline fan connections.
4. Kitchen hoods. Light domestic extract where suitable.
5. Offices. Ceiling void runs.
6. Hotels. Room connections.
7. Server rooms. Air supply.
8. Dryers and exhaust. Non-insulated duct.
9. Clinics. Ventilation.

How to choose and install

• Use insulated duct for cooled air.
• Keep runs short and pulled tight.
• Avoid sharp bends that crush the duct.
• Clamp and tape every joint.

Why choose Sparks Plumbing Experts

1. Tubes and sheets in many sizesPipe insulation tubes and sheets cover common copper and steel pipe sizes.
2. Tapes and finishing materialsInsulation tapes and related materials help you seal joints properly.
3. Condensation adviceWe help you choose a wall thickness that keeps cold pipes dry in your conditions.
4. Matched to your pipeworkOrder insulation together with the copper pipe it covers.
5. Visit or collect in NairobiOur store is at KCB Building, Enterprise Road, in the Industrial Area, so you can see parts before you buy or collect your order.
6. Quotes your wayAsk for prices by phone, WhatsApp, email or the online quote form, whichever suits you on site.
7. Over 1,600 products in one placeOur catalogue covers 55 categories, so one supplier can handle most of your parts list.
8. Help choosing the right partSend a nameplate photo, a drawing or the old part, and we help you match size and specification.
9. Single items or project quantitiesWe price a single replacement part just as readily as a full site order.
10. Supply across East AfricaWe serve customers across Kenya, and we also supply buyers in Uganda and Tanzania.

Related products and accessories

• 1/2″ Armaflex Insulation Sheets
• 1/2″ Armaflex insulation tubes
• 1/4″ Armaflex insulation tubes

Browse more: Insulation · HVAC · Ventilation · Diffusers.

Ordering from Sparks Plumbing Experts

We supply customers across Kenya, and we also serve buyers in Uganda and Tanzania. You can collect from our store at KCB Building, Enterprise Road, Nairobi, or ask us about delivery to your site. Send your quantities and specifications, and we will reply with prices and availability.

Request a Quote WhatsApp 0726 086 895

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