Non-Insulated Flexible Duct in Kenya | HVAC Flexible Air Duct for Ventilation & Air Distribution
Looking for non-insulated flexible duct in Kenya for ventilation, air distribution, equipment connections, extraction or other HVAC applications?
Kingsman Engineering & Industrial Insulation Ltd is a leading importer and supplier of HVAC products, flexible ducting, air-conditioning materials, refrigeration products, insulation solutions and related engineering materials in Kenya and East Africa.
We supply HVAC products and materials for HVAC contractors, refrigeration technicians, engineers, businesses, institutions, commercial buildings, industrial facilities and project installers.
Our HVAC range includes flexible ducting, insulated and non-insulated flexible ducts, HVAC grilles and diffusers, ventilation products, air curtains, HVAC insulation, copper pipes, refrigerants, vacuum pumps and other air-conditioning and refrigeration installation materials, subject to current availability.
If you need non-insulated flexible duct in Nairobi, Kenya or elsewhere in East Africa, contact Kingsman Engineering for current availability, product specifications, quantities and quotation information.
Call or WhatsApp: 0722 209 507 / 0721 953 570
Email: info@kingsmanengineering.co.ke
What Is Non-Insulated Flexible Duct?
Non-insulated flexible duct is flexible air ducting without an integrated insulation layer around the air-carrying duct.
It is used to move air between suitable HVAC equipment, fans, grilles, diffusers, ductwork and other air-distribution components where integrated thermal insulation is not required.
Its flexible construction allows it to follow practical routes around obstacles and can make certain connections easier to install than rigid ductwork.
Depending on the product construction and HVAC design, non-insulated flexible duct may be used for:
- Ventilation
- Air distribution
- Equipment connections
- Fan connections
- Grille connections
- Diffuser connections
- Branch duct connections
- Extract-air systems
- Exhaust-air applications where suitable
- Fresh-air applications where suitable
- HVAC retrofit projects
- Commercial installations
- Residential ventilation systems
- Industrial air-distribution applications
Actual suitability depends on the product specification and operating conditions.
Non-Insulated Flexible Duct Supplier in Kenya
Kingsman Engineering supplies HVAC products to customers in Nairobi and across Kenya.
When requesting non-insulated flexible duct, provide the following information where possible:
- Required diameter
- Required length
- Quantity
- Application
- Airflow requirement
- Equipment being connected
- Project location
- Delivery requirements
For larger projects, provide:
- HVAC drawings
- Duct schedules
- Material schedules
- Bills of quantities
- Project specifications
This can help with accurate product selection and quotation.
Because stock and specifications can change, always confirm the current product specification and availability with Kingsman Engineering before ordering.
Where Is Non-Insulated Flexible Duct Used?
Non-insulated flexible duct can be useful where the air being transported does not require integrated thermal insulation.
Potential applications include:
Ventilation
- Fresh-air distribution
- General ventilation
- Branch ventilation
- Fan connections
- Air movement systems
Air distribution
- Equipment connections
- Grille connections
- Diffuser connections
- Short branch connections
Exhaust and extraction
Certain products may be suitable for:
- Exhaust-air systems
- Extraction systems
- Ventilation connections
The specific product must be checked for suitability before use in specialised applications.
HVAC installations
Non-insulated flexible duct may also be used for:
- Retrofit projects
- Equipment connections
- Temporary or modified duct routes
- Suitable concealed installations
Non-Insulated Flexible Duct for Ventilation
Ventilation is one of the common applications for non-insulated flexible ducting.
It may be used to connect:
- Ventilation fans
- Inline duct fans
- Air outlets
- Grilles
- Diffusers
- Branch ductwork
- Other suitable ventilation components
Potential applications include:
- Offices
- Shops
- Restaurants
- Workshops
- Warehouses
- Commercial buildings
- Residential properties
- Institutions
- Suitable industrial facilities
The duct diameter should be selected according to the ventilation system’s airflow and pressure requirements.
Non-Insulated Flexible Duct for Air Conditioning
Non-insulated flexible duct can be used in some air-conditioning systems, but the absence of integrated insulation must be considered carefully.
Where conditioned air is being transported through areas where thermal control or condensation management is required, an insulated flexible duct may be more appropriate.
Non-insulated duct may still be suitable for certain:
- Equipment connections
- Short connections
- Applications where separate insulation is provided
- Locations where insulation is not required
- HVAC systems designed specifically for non-insulated ducting
Always confirm the HVAC design before selecting non-insulated duct for conditioned-air distribution.
Non-Insulated vs Insulated Flexible Duct
The main difference is whether the flexible duct includes an integrated insulation layer.
| Feature | Non-Insulated Flexible Duct | Insulated Flexible Duct |
|---|---|---|
| Integrated insulation | No | Yes |
| Thermal protection | Limited unless separately insulated | Built into the product |
| Condensation considerations | May require separate insulation where necessary | Can assist when correctly specified |
| Ventilation | Suitable for many applications | Suitable where insulation is required |
| Air conditioning | Application-dependent | Commonly considered where thermal control is required |
| Construction | Simpler | Includes insulation layer |
| Selection | Based on HVAC requirements | Based on HVAC and thermal requirements |
Neither option is automatically correct for every project.
The choice depends on the application, environment, HVAC design and product specification.
Can Non-Insulated Flexible Duct Be Insulated Separately?
Yes, in some installations, insulation can be provided separately around a non-insulated flexible duct.
This can be considered where the duct itself is suitable but the installation requires additional thermal insulation.
However, the complete system should be designed and installed appropriately.
Important considerations include:
- Insulation material
- Required insulation thickness
- Vapour control where applicable
- Condensation risk
- Installation environment
- Temperature conditions
- Mechanical protection
- Manufacturer recommendations
If thermal insulation is required, compare the practicality of using a purpose-made insulated flexible duct with separately insulating a non-insulated duct.
Non-Insulated Flexible Duct Sizes in Kenya
Flexible ducting is available in different diameters depending on manufacturer and product range.
Common nominal sizes include:
- 4 inch – approximately 101.6 mm
- 5 inch – approximately 127 mm
- 6 inch – approximately 152.4 mm
- 7 inch – approximately 177.8 mm
- 8 inch – approximately 203.2 mm
- 9 inch – approximately 228.6 mm
- 10 inch – approximately 254 mm
- 12 inch – approximately 304.8 mm
These are mathematical conversions from inches to millimetres.
Actual products may use nominal sizing conventions.
For exact compatibility, confirm the manufacturer’s actual dimensions before ordering.
How to Choose the Right Non-Insulated Flexible Duct Size
Choosing the correct diameter involves more than measuring the physical space available.
Consider:
1. Required airflow
Determine the airflow that the system needs to deliver or extract.
2. Air velocity
Duct diameter affects the velocity of air through the duct.
3. Static pressure
The duct contributes to system resistance.
4. Duct length
Longer flexible duct runs generally introduce more resistance.
5. Number of bends
Sharp and unnecessary bends can increase resistance.
6. Fan capacity
The fan must be capable of handling the system’s required airflow and pressure.
7. Connection diameter
Check the actual connection on the equipment, grille, diffuser or fitting.
8. Installation environment
Consider whether the duct will be exposed, concealed, indoors or in another environment.
How Much Air Can Non-Insulated Flexible Duct Carry?
There is no single airflow rating for every non-insulated flexible duct.
Actual airflow depends on:
- Duct diameter
- Air velocity
- Duct length
- Number of bends
- Compression
- Fan capacity
- Static pressure
- System resistance
- Grille or diffuser resistance
- Connection design
- Installation quality
- Duct construction
A larger duct does not automatically mean that the complete system will deliver a specific airflow.
For engineered HVAC installations, duct size should be selected according to the project’s airflow and pressure calculations.
Non-Insulated Flexible Duct and Airflow Performance
Flexible duct can perform differently depending on how it is installed.
A poorly installed flexible duct can develop:
- Kinks
- Sagging
- Compression
- Excessive bends
- Restricted internal diameter
- Leakage at connections
These conditions can increase resistance and affect airflow.
Proper routing and support are therefore important.
Non-Insulated Flexible Duct for Exhaust and Extraction
Some non-insulated flexible duct products may be suitable for exhaust and extraction applications.
Potential applications can include:
- General air extraction
- Ventilation
- Equipment exhaust
- Workshop ventilation
- Commercial extraction
- Suitable industrial ventilation
However, exhaust applications can have different requirements depending on:
- Air temperature
- Moisture
- Chemical exposure
- Particulate content
- Airflow
- Pressure
- Fire-performance requirements
Do not assume a standard flexible duct is suitable for every exhaust or extraction application.
Confirm the product specification before installation
Non-Insulated Flexible Duct for Fans
Flexible duct can provide suitable connections between fans and ductwork.
Potential equipment includes:
- Inline duct fans
- Ventilation fans
- Exhaust fans
- Air-moving equipment
When connecting a flexible duct to a fan, check:
- Fan outlet diameter
- Duct diameter
- Airflow
- Static pressure
- Connection method
- Installation space
Where vibration is a consideration, the complete connection should be designed appropriately.
Non-Insulated Flexible Duct for Grilles and Diffusers
Flexible duct can be used to connect suitable grilles and diffusers to the main or branch duct system.
Before ordering, confirm:
- Duct diameter
- Grille neck size
- Diffuser neck size
- Required airflow
- Connection arrangement
- Available installation space
Kingsman Engineering also supplies HVAC grilles and diffusers, subject to current availability.
Non-Insulated Flexible Duct vs Rigid Duct
Flexible and rigid ductwork can perform different roles within an HVAC system.
Non-insulated flexible duct
May be useful for:
- Short connections
- Equipment connections
- Branch connections
- Fan connections
- Retrofit installations
- Routes around obstacles
Rigid duct
May be used for:
- Main duct distribution
- Longer structured runs
- Engineered duct systems
- Applications requiring fixed geometry
An HVAC system can use rigid and flexible ductwork together.
The appropriate combination depends on the design and installation requirements.
Advantages of Non-Insulated Flexible Duct
Depending on the application, non-insulated flexible duct can offer:
Flexible routing
It can follow practical routes around obstacles.
Useful for connections
It can simplify certain equipment, grille and diffuser connections.
Lightweight construction
Flexible duct can be easier to handle than some rigid duct components.
Suitable for selected ventilation systems
Where thermal insulation is not required, non-insulated duct can be appropriate.
Useful for retrofit work
Its flexibility can help when adapting existing installations.
These benefits depend on proper product selection and installation.
Limitations of Non-Insulated Flexible Duct
Non-insulated duct is not appropriate for every HVAC application.
Potential limitations include:
- No integrated thermal insulation
- Possible need for separate insulation
- Condensation considerations in cold-air applications
- Performance can be affected by compression
- Excessive bends can increase resistance
- Poor support can cause sagging
- Product suitability varies by application
Always select the duct based on the actual HVAC requirements.
Non-Insulated Flexible Duct Installation
Correct installation helps maintain the intended duct diameter and minimise unnecessary resistance.
1. Confirm the duct size
Check the HVAC drawings and connection dimensions.
2. Plan the route
Avoid unnecessary length and excessive bends.
3. Avoid sharp bends
Use smooth routing wherever practical.
4. Avoid compression
Do not crush the duct during installation.
5. Support the duct
Use suitable support according to the manufacturer’s recommendations.
6. Secure connections
Ensure connections are properly attached.
7. Seal where required
Use suitable sealing methods for the application.
8. Inspect the installation
Check for:
- Kinks
- Sagging
- Compression
- Damage
- Loose connections
- Air leakage
- Excessive bends
Common Non-Insulated Flexible Duct Installation Mistakes
Selecting the wrong diameter
The duct should match the HVAC design.
Excessive compression
Compression can restrict airflow.
Excessive bends
Sharp bends can increase resistance.
Poor support
Sagging can restrict the internal air passage.
Excessive duct length
Long runs can increase pressure losses.
Poor sealing
Leaks can reduce system performance.
Using non-insulated duct where insulation is required
This can create thermal-control and condensation concerns.
Assuming all flexible ducts have the same specification
Different products can have different construction and performance characteristics.
How to Measure for Non-Insulated Flexible Duct
Before ordering, establish:
Diameter:
Confirm the required duct size.
Length:
Measure each individual duct run.
Quantity:
Count the number of runs.
Application:
State whether the duct is for ventilation, air distribution, exhaust, extraction or another application.
Connections:
Identify what each end connects to.
Airflow:
Provide the design airflow where available.
Location:
Provide the project or delivery location.
For larger projects, provide HVAC drawings, schedules or bills of quantities.
How Much Non-Insulated Flexible Duct Do I Need?
Calculate the requirement by identifying each duct run separately.
For example:
- Number of runs
- Length of each run
- Diameter of each run
- Number of outlets
- Number of branches
- Connection requirements
- Application
For larger projects, use the HVAC drawings or bill of quantities as the primary reference.
Avoid estimating the required quantity based only on floor area.
Non-Insulated Flexible Duct for HVAC Contractors in Kenya
HVAC contractors may require non-insulated flexible duct together with other HVAC products.
These can include:
- HVAC grilles
- HVAC diffusers
- Ventilation fans
- Inline duct fans
- Air curtains
- Copper pipes
- Refrigerants
- HVAC insulation
- Aluminium insulation tape
- Armaflex insulation
- Other HVAC installation accessories
Kingsman Engineering supplies HVAC, refrigeration, insulation and related engineering products, subject to current availability.
Contractors can provide their complete material schedule when requesting a quotation.
Buying Non-Insulated Flexible Duct in Nairobi
If you are searching for:
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contact Kingsman Engineering & Industrial Insulation Ltd.
Provide your required diameter, quantity, application and project location so that current availability can be confirmed.
Non-Insulated Flexible Duct Supply Across Kenya
Kingsman Engineering supplies HVAC products to customers in Nairobi and across Kenya.
For customers outside Nairobi, provide:
- Product required
- Duct size
- Quantity
- Delivery location
- Project requirements
Our team can advise on available supply arrangements.
Non-Insulated Flexible Duct Supply Across East Africa
Kingsman Engineering & Industrial Insulation Ltd serves customers and projects across the wider East African market.
For projects outside Kenya, contact us with:
- Product required
- Size
- Quantity
- Destination
- Project requirements
We can advise on available supply options.
Why Source Flexible Duct from Kingsman Engineering?
Kingsman Engineering supplies HVAC, refrigeration, insulation and related engineering products to contractors, technicians, engineers, businesses and project owners.
Our HVAC categories include:
- Flexible ducting
- Insulated flexible ducting
- Non-insulated flexible ducting
- HVAC grilles
- HVAC diffusers
- Ventilation products
- Air curtains
- HVAC insulation
- Copper pipes
- Refrigerants
- Vacuum pumps
- Air-conditioning accessories
- Refrigeration materials
- Related engineering products
For projects requiring several HVAC materials, sourcing multiple products through one supplier can help simplify procurement and project coordination.
Frequently Asked Questions About Non-Insulated Flexible Duct in Kenya
1. What is non-insulated flexible duct?
Non-insulated flexible duct is flexible air ducting without an integrated insulation layer.
2. What is non-insulated flexible duct used for?
It can be used for suitable ventilation, air distribution, equipment connections, fan connections and other HVAC applications where integrated insulation is not required.
3. Is non-insulated flexible duct suitable for ventilation?
Yes. It is commonly considered for suitable ventilation applications.
4. Can non-insulated flexible duct be used for air conditioning?
It can be used in certain air-conditioning applications, but the thermal and condensation requirements of the system must be considered.
5. What is the difference between insulated and non-insulated flexible duct?
Insulated flexible duct has an integrated insulation layer. Non-insulated flexible duct does not.
6. Can I insulate non-insulated flexible duct separately?
In suitable applications, separate insulation can be installed around non-insulated duct. The complete system should be specified and installed correctly.
7. Does non-insulated duct prevent condensation?
No integrated insulation is provided, so condensation considerations are particularly important when transporting cold air through warmer or humid environments.
8. What sizes of non-insulated flexible duct are available?
Sizes vary by manufacturer and product range. Common nominal sizes include 4, 5, 6, 7, 8, 9, 10 and 12 inches, subject to current availability.
9. What is 12 inch flexible duct in millimetres?
Twelve inches mathematically equals 304.8 mm, although a product may use approximately 300 mm as a nominal metric designation.
10. What is 10 inch flexible duct in millimetres?
Ten inches mathematically equals 254 mm.
11. What is 8 inch flexible duct in millimetres?
Eight inches mathematically equals approximately 203.2 mm.
12. Can non-insulated flexible duct be installed in a ceiling?
Yes, where the application and product specification are appropriate and the duct is properly routed and supported.
13. Can non-insulated flexible duct connect to a grille?
Yes, where the duct diameter and grille connection are compatible.
14. Can non-insulated flexible duct connect to a diffuser?
Yes, where the duct and diffuser connection dimensions are compatible.
15. Can non-insulated flexible duct connect to a fan?
Yes, where the fan outlet and duct connection are compatible.
16. How much airflow can non-insulated flexible duct carry?
There is no universal airflow value. It depends on diameter, velocity, length, bends, fan capacity, pressure and other system factors.
17. Can non-insulated flexible duct be used for exhaust?
Some products may be suitable for exhaust. Confirm the product construction and application suitability before installation.
18. What causes poor airflow in flexible duct?
Potential causes include sharp bends, excessive compression, sagging, long runs, leakage and inappropriate sizing.
19. Does flexible duct need support?
Yes. It should be supported according to the manufacturer’s recommendations.
20. Can flexible duct be compressed?
Excessive compression should be avoided because it can restrict airflow and increase system resistance.
21. Can non-insulated duct be used outdoors?
Outdoor suitability depends on the specific product construction and environmental conditions. Confirm the manufacturer’s specification before outdoor installation.
22. How do I choose non-insulated flexible duct?
Consider diameter, airflow, air velocity, pressure, length, bends, connection dimensions, operating environment and whether insulation is required.
23. Where can I buy non-insulated flexible duct in Kenya?
Contact Kingsman Engineering & Industrial Insulation Ltd for current availability, specifications and quotation information.
24. Do you supply non-insulated flexible duct outside Nairobi?
Kingsman Engineering supplies HVAC products to customers across Kenya, subject to availability and delivery arrangements.
25. Can Kingsman supply other HVAC products with non-insulated flexible duct?
Yes. Customers can enquire about grilles, diffusers, ventilation fans, air curtains, copper pipes, refrigerants, insulation and other HVAC-related products