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- Dwell DCIF PRO Inline Centrifugal Duct Fan
Dwell DCIF PRO Inline Centrifugal Duct Fan
http://www.dwellventilation.com/shop/dwell-dcif-pro-inline-centrifugal-duct-fan-2692 http://www.dwellventilation.com/web/image/product.template/2692/image_1920?unique=0142444DCIF PRO Inline Centrifugal Fan – Compact Power with Wide Airflow Range (240–1540 m³/h)
- Efficient inline centrifugal fan ideal for high-performance air supply and exhaust
- Compact yet powerful – delivers consistent airflow from 240 to 1540 m³/h
- Low-noise operation with dynamically balanced backward-curved impeller
- Heavy-duty galvanized steel casing for strength and corrosion resistance
- Long-life IP44-rated motor with thermal protection and 40,000+ hour durability
- Flexible wall or ceiling mounting with included brackets
- Supports smooth or step speed control via external controllers
Perfect for commercial, industrial, or office spaces where silent power meets compact design.
Terms and Conditions
1. No Returns
2. Standard Warranty 1 Year
3. Detailed T&C here.
4. By Purchasing you agree to T&C and return policy.
High-Pressure Metal Inline Fan Engineered for Duct Runs Up to 250 Feet
When your ventilation path must travel up multiple building floors, navigate several sharp duct bends, or pull steam from multiple bathroom points at once, standard exhaust fans quickly lose suction. The Dwell DCIF PRO is a heavy-duty metal inline fan built around a high-pressure backward-curved centrifugal impeller and an industrial external rotor motor. Housed in durable galvanized steel, it generates up to 830 Pa of static pressure to evacuate kitchen heat, dense moisture, and stale air across duct runs up to 250 feet—delivering uncompromising suction while keeping motor noise completely out of your rooms.
Heavy-Duty Galvanized Steel Casing
Rugged metal construction built to last. Formed from tough galvanized sheet metal that resists high temperatures, humidity, and duct vibrations, providing an airtight, rigid seal for decades.
Centrifugal Pressure Up to 830 Pa
Uncompromising suction across complex duct routes. The backward-curved centrifugal turbine flings air radially outward, generating immense pressure to conquer ducts up to 250 ft without choking.
Multi-Point & Multi-Room Suction
One central fan ventilating multiple zones. Pull air simultaneously from a shower enclosure and a WC, or connect two separate bathrooms via branch ducting without pressure loss.
Airstream-Cooled External Rotor Motor
Compact, self-cooling industrial motor. The rotor surrounds the stator inside the impeller hub, cooled directly by passing airflow with 40,000-hr ball bearings and automatic thermal protection.
Uncompromising static pressure for long vertical shafts, kitchens, and multi-point layouts.
In modern apartments, villas, and commercial buildings, exhaust points are rarely right next to an outer wall. Air must often travel horizontally across large false ceilings and then push upward through 3 to 10 stories of vertical building shafts before exhausting at the terrace. Standard axial or mixed-flow fans lack the pressure required for these routes; the backpressure chokes the fan, trapping humid air inside the ducts and allowing kitchen aromas and bathroom moisture to linger.
The Dwell DCIF PRO metal inline fan is engineered specifically to eliminate this friction bottleneck. Its aerodynamically tuned centrifugal impeller and heavy-gauge steel casing deliver the raw driving force needed to propel air up to 250 feet. It is equally effective for multi-point extraction—allowing you to connect your shower zone, toilet enclosure, and vanity to a single central fan hidden safely in the ceiling. You get clean walls, minimal ceiling grilles, zero motor hum in your room, and powerful, reliable air changes on every run.
- Heavy-gauge galvanized steel body designed for residential and light-commercial duct lines
- Up to 250 ft duct reach through multi-floor vertical risers and multiple 90° bends
- Non-stalling backward-curved centrifugal impeller that actively resists grease accumulation
- High static pressure (up to 830 Pa) enabling multi-point branch ducting from one unit
- 40,000-hour external rotor motor with IP44 protection and automatic thermal reset
Planning a long duct route or multi-point bathroom layout?
Our ventilation specialists help you size the right fan model, calculate friction across vertical risers, and design balanced branch duct systems.
Engineered for High-Resistance Ducted Environments
Engineered for applications where duct friction, vertical height, or multi-point extraction demands high static pressure that standard fans cannot deliver.
Multi-Point Master Bathrooms
Targeted extraction where moisture forms fastest. Pull air simultaneously from the shower cubicle and WC enclosure using a single ceiling-concealed DCIF PRO fan, keeping large en-suite bathrooms completely fog-free.
Multi-Bathroom Shared Ventilation
One powerful metal fan serving two adjacent washrooms. Connect a guest bath and powder room to a central DCIF 150 PRO or 200 PRO via a Y-splitter, cutting equipment, core-cutting, and wiring costs.
Residential Kitchen General Exhaust
Evacuating ambient cooking heat, steam, and aromas. Vents general cooking heat, boiling steam, and lingering food smells from modular open kitchens and enclosed pantry areas through long ceiling runs.
Multi-Story Vertical Risers & Shafts
Driving exhaust upward to terrace terminations. Overcomes the chimney effect, downdrafts, and exterior wind resistance in apartment utility shafts where exhaust must travel multiple floors to the roof.
High-Footfall Commercial Restrooms
Continuous 12 to 18 hour non-stop odor evacuation. Designed for corporate offices, diagnostic labs, and retail washrooms where external rotor motors run continuously without thermal degradation.
Enclosed Utility Balconies & Laundries
Extracting heavy dryer heat and washing machine moisture. Quickly evacuates damp humidity from enclosed washing machine nooks and basement utility rooms, preventing mold and wall dampness.
The Science of Non-Stalling Static Pressure
Unlike axial fans that push air in a straight line, a centrifugal fan pulls air into its center and hurls it outward with centrifugal force, converting rotational velocity into driving static pressure.
Multi-Point Intake at Room Grilles
Air enters through discreet architectural grilles positioned directly above moisture sources (shower cubicles, WCs, or kitchen counters). Because the fan sits meters away in the ceiling void, direct motor vibration is completely isolated from the room.
Radial Centrifugal Compression (Up to 830 Pa)
Air enters the center of the backward-curved impeller wheel. High-speed rotation flings the air outward against the spiral galvanized steel casing, building immense static pressure to overcome heavy duct resistance.
Ultra-Long Duct Reach (Up to 250 Feet)
The pressurized air exits the circular metal spigot with high kinetic energy, driving smoothly through flexible aluminum or rigid spiral ducts, multiple 90° bends, vertical risers, and exterior gravity louvers.
Continuous Airstream Motor Cooling
The external rotor motor sits inside the airstream, utilizing the flowing air for continuous convection cooling. This unique design prevents thermal throttling and protects the precision ball bearings over decades of use.
Compare Technical Specifications by Model
All performance figures are verified single-speed operating data tested at 220 V / 50–60 Hz. Select a model below to compare airflow, static pressure, and electrical ratings.
| Nominal Duct Diameter | 100 mm (4") · 100 mm Spigot Ø |
|---|---|
| Airflow Capacity | 235 m³/h · 138.3 CFM |
| Static Pressure | 350 Pa |
| Noise Level @ 3m | 47 dB(A) |
| Input Power | 72 W |
| Motor Speed | 2650 RPM |
| Operating Voltage | 220 V (50/60 Hz), Single Phase |
| Motor Protection Rating | IP44 |
| Motor Architecture | External Rotor Motor |
| Bearing Type | Dual Ball Bearings (40,000 hrs) |
| Casing Material | Heavy-Duty Galvanized Steel |
| Nominal Duct Diameter | 125 mm (5") · 125 mm Spigot Ø |
|---|---|
| Airflow Capacity | 275 m³/h · 161.9 CFM |
| Static Pressure | 390 Pa |
| Noise Level @ 3m | 47 dB(A) |
| Input Power | 80 W |
| Motor Speed | 2650 RPM |
| Operating Voltage | 220 V (50/60 Hz), Single Phase |
| Motor Protection Rating | IP44 |
| Motor Architecture | External Rotor Motor |
| Bearing Type | Dual Ball Bearings (40,000 hrs) |
| Casing Material | Heavy-Duty Galvanized Steel |
| Nominal Duct Diameter | 150 mm (6") · 148 mm Spigot Ø |
|---|---|
| Airflow Capacity | 450 m³/h · 264.9 CFM |
| Static Pressure | 450 Pa |
| Noise Level @ 3m | 46 dB(A) |
| Input Power | 94 W |
| Motor Speed | 2770 RPM |
| Operating Voltage | 220 V (50/60 Hz), Single Phase |
| Motor Protection Rating | IP44 |
| Motor Architecture | External Rotor Motor |
| Bearing Type | Dual Ball Bearings (40,000 hrs) |
| Casing Material | Heavy-Duty Galvanized Steel |
| Nominal Duct Diameter | 200 mm (8") · 200 mm Spigot Ø |
|---|---|
| Airflow Capacity | 830 m³/h · 488.5 CFM |
| Static Pressure | 550 Pa |
| Noise Level @ 3m | 53 dB(A) |
| Input Power | 157 W |
| Motor Speed | 2550 RPM |
| Operating Voltage | 220 V (50/60 Hz), Single Phase |
| Motor Protection Rating | IP44 |
| Motor Architecture | External Rotor Motor |
| Bearing Type | Dual Ball Bearings (40,000 hrs) |
| Casing Material | Heavy-Duty Galvanized Steel |
| Nominal Duct Diameter | 315 mm (12") · 315 mm Spigot Ø |
|---|---|
| Airflow Capacity | 1200 m³/h · 706.3 CFM |
| Static Pressure | 830 Pa |
| Noise Level @ 3m | 60 dB(A) |
| Input Power | 230 W |
| Motor Speed | 2660 RPM |
| Operating Voltage | 220 V (50/60 Hz), Single Phase |
| Motor Protection Rating | IP44 |
| Motor Architecture | External Rotor Motor |
| Bearing Type | Dual Ball Bearings (40,000 hrs) |
| Casing Material | Heavy-Duty Galvanized Steel |
Centrifugal Pressure vs Airflow
Steep pressure curves ensure continuous extraction across long ducts up to 250 ft.
Casing Measurements & Mounting Clearances
Check spigot collar diameters, casing dimensions, and minimum void requirements before framing false ceilings or mounting brackets.
| Spigot Collar Ø (A) | 100 mm (fits standard 100 mm / 4" round duct) |
|---|---|
| Casing Outer Ø (B) | 240 mm |
| Spigot Collar Lip (C) | 23 mm |
| Total Body Length (D) | 195 mm |
| Recommended Ceiling Void | 250 mm minimum clearance |
| Spigot Collar Ø (A) | 125 mm (fits standard 125 mm / 5" round duct) |
|---|---|
| Casing Outer Ø (B) | 240 mm |
| Spigot Collar Lip (C) | 26 mm |
| Total Body Length (D) | 190 mm |
| Recommended Ceiling Void | 250 mm minimum clearance |
| Spigot Collar Ø (A) | 148 mm (fits standard 150 mm / 6" round duct) |
|---|---|
| Casing Outer Ø (B) | 278 mm |
| Spigot Collar Lip (C) | 25 mm |
| Total Body Length (D) | 200 mm |
| Recommended Ceiling Void | 290 mm minimum clearance |
| Spigot Collar Ø (A) | 200 mm (fits standard 200 mm / 8" round duct) |
|---|---|
| Casing Outer Ø (B) | 330 mm |
| Spigot Collar Lip (C) | 33 mm |
| Total Body Length (D) | 215 mm |
| Recommended Ceiling Void | 340 mm minimum clearance |
| Spigot Collar Ø (A) | 315 mm (fits standard 315 mm / 12" round duct) |
|---|---|
| Casing Outer Ø (B) | 395 mm |
| Spigot Collar Lip (C) | 30 mm |
| Total Body Length (D) | 245 mm |
| Recommended Ceiling Void | 410 mm minimum clearance |
Common Questions About Dwell DCIF PRO
Clear, factual answers on sizing, acoustics, duct layout limits, and multi-point ventilation.
When should I choose DCIF PRO over a mixed-flow fan like MIX PRO?
Choose MIX PRO for standard residential duct runs under 30 feet where ultra-low noise is the top priority. Choose DCIF PRO when your exhaust duct route exceeds 30 feet (up to 250 ft), when venting vertically up building shafts, when extracting grease and heat from kitchens, or when connecting multiple washroom intake points to one central fan that needs high static pressure (up to 830 Pa).
Can one DCIF PRO fan ventilate multiple bathrooms or multiple points in one bathroom?
Yes. This is one of the biggest advantages of DCIF PRO. Because its centrifugal impeller develops massive static pressure, you can run branch ducting from a single DCIF 150 PRO or 200 PRO to pull air simultaneously from a shower enclosure and a WC, or from two separate adjacent washrooms. Sizing the fan correctly ensures strong, balanced suction at every grille.
Why is a galvanized steel metal casing better for ducted ventilation?
Galvanized steel offers superior rigidity, fire resistance, and dimensional stability. It withstands warm cooking exhaust, resists building settling vibrations, and does not crack or degrade in dark, humid service shafts. It also provides excellent acoustic dampening against low-frequency motor hum.
How far can the DCIF PRO push exhaust air?
The DCIF PRO is engineered to maintain active air velocity across duct runs up to 250 feet, overcoming the resistance of internal duct friction, multiple 90° elbows, flexible duct corrugations, and exterior gravity louvers.
Does the fan require an external speed controller?
No. Dwell recommends selecting the exact fan model that matches your room volume and duct layout so the fan operates at its peak aerodynamic efficiency on a standard single-speed switch. This eliminates unnecessary controller costs, humming motor noise from low-cost triac dimmers, and complex electrical wiring.
How do I maintain the fan once the false ceiling is closed?
Always install a standard 300 × 300 mm access panel in the false ceiling directly beneath the fan. The fan external rotor motor and backward-curved impeller naturally resist dust and grease accumulation. During routine annual maintenance, open the inspection hatch and wipe down the impeller blades without dismantling the duct connections.
Certificates, Manuals & CAD Drawings
Access certified user manuals, dimensional drawings, and CAD blocks to integrate Dwell DCIF PRO directly into your architectural layouts and MEP schematics.
Installation Manual
Wiring schematics, mounting bracket dimensions, electrical connection protocols, and safety guidelines.
Download Manual (PDF)Product Specification Brochure
Detailed aerodynamic performance curves, acoustic ratings, and dimensional data across all sizes.
Download Brochure (PDF)2D CAD Drawings (.DWG)
CAD drawing blocks for ceiling plenum coordination and duct integration:
Need duct resistance calculations or assistance with multi-point layouts?
Connect with our technical ventilation desk for sizing calculations, multi-unit project pricing, or CAD duct layouts.
High-Pressure Metal Inline Fan Engineered for Duct Runs Up to 250 Feet
When your ventilation path must travel up multiple building floors, navigate several sharp duct bends, or pull steam from multiple bathroom points at once, standard exhaust fans quickly lose suction. The Dwell DCIF PRO is a heavy-duty metal inline fan built around a high-pressure backward-curved centrifugal impeller and an industrial external rotor motor. Housed in durable galvanized steel, it generates up to 830 Pa of static pressure to evacuate kitchen heat, dense moisture, and stale air across duct runs up to 250 feet—delivering uncompromising suction while keeping motor noise completely out of your rooms.
Heavy-Duty Galvanized Steel Casing
Rugged metal construction built to last. Formed from tough galvanized sheet metal that resists high temperatures, humidity, and duct vibrations, providing an airtight, rigid seal for decades.
Centrifugal Pressure Up to 830 Pa
Uncompromising suction across complex duct routes. The backward-curved centrifugal turbine flings air radially outward, generating immense pressure to conquer ducts up to 250 ft without choking.
Multi-Point & Multi-Room Suction
One central fan ventilating multiple zones. Pull air simultaneously from a shower enclosure and a WC, or connect two separate bathrooms via branch ducting without pressure loss.
Airstream-Cooled External Rotor Motor
Compact, self-cooling industrial motor. The rotor surrounds the stator inside the impeller hub, cooled directly by passing airflow with 40,000-hr ball bearings and automatic thermal protection.
Uncompromising static pressure for long vertical shafts, kitchens, and multi-point layouts.
In modern apartments, villas, and commercial buildings, exhaust points are rarely right next to an outer wall. Air must often travel horizontally across large false ceilings and then push upward through 3 to 10 stories of vertical building shafts before exhausting at the terrace. Standard axial or mixed-flow fans lack the pressure required for these routes; the backpressure chokes the fan, trapping humid air inside the ducts and allowing kitchen aromas and bathroom moisture to linger.
The Dwell DCIF PRO metal inline fan is engineered specifically to eliminate this friction bottleneck. Its aerodynamically tuned centrifugal impeller and heavy-gauge steel casing deliver the raw driving force needed to propel air up to 250 feet. It is equally effective for multi-point extraction—allowing you to connect your shower zone, toilet enclosure, and vanity to a single central fan hidden safely in the ceiling. You get clean walls, minimal ceiling grilles, zero motor hum in your room, and powerful, reliable air changes on every run.
- Heavy-gauge galvanized steel body designed for residential and light-commercial duct lines
- Up to 250 ft duct reach through multi-floor vertical risers and multiple 90° bends
- Non-stalling backward-curved centrifugal impeller that actively resists grease accumulation
- High static pressure (up to 830 Pa) enabling multi-point branch ducting from one unit
- 40,000-hour external rotor motor with IP44 protection and automatic thermal reset
Planning a long duct route or multi-point bathroom layout?
Our ventilation specialists help you size the right fan model, calculate friction across vertical risers, and design balanced branch duct systems.
Engineered for High-Resistance Ducted Environments
Engineered for applications where duct friction, vertical height, or multi-point extraction demands high static pressure that standard fans cannot deliver.
Multi-Point Master Bathrooms
Targeted extraction where moisture forms fastest. Pull air simultaneously from the shower cubicle and WC enclosure using a single ceiling-concealed DCIF PRO fan, keeping large en-suite bathrooms completely fog-free.
Multi-Bathroom Shared Ventilation
One powerful metal fan serving two adjacent washrooms. Connect a guest bath and powder room to a central DCIF 150 PRO or 200 PRO via a Y-splitter, cutting equipment, core-cutting, and wiring costs.
Residential Kitchen General Exhaust
Evacuating ambient cooking heat, steam, and aromas. Vents general cooking heat, boiling steam, and lingering food smells from modular open kitchens and enclosed pantry areas through long ceiling runs.
Multi-Story Vertical Risers & Shafts
Driving exhaust upward to terrace terminations. Overcomes the chimney effect, downdrafts, and exterior wind resistance in apartment utility shafts where exhaust must travel multiple floors to the roof.
High-Footfall Commercial Restrooms
Continuous 12 to 18 hour non-stop odor evacuation. Designed for corporate offices, diagnostic labs, and retail washrooms where external rotor motors run continuously without thermal degradation.
Enclosed Utility Balconies & Laundries
Extracting heavy dryer heat and washing machine moisture. Quickly evacuates damp humidity from enclosed washing machine nooks and basement utility rooms, preventing mold and wall dampness.
The Science of Non-Stalling Static Pressure
Unlike axial fans that push air in a straight line, a centrifugal fan pulls air into its center and hurls it outward with centrifugal force, converting rotational velocity into driving static pressure.
Multi-Point Intake at Room Grilles
Air enters through discreet architectural grilles positioned directly above moisture sources (shower cubicles, WCs, or kitchen counters). Because the fan sits meters away in the ceiling void, direct motor vibration is completely isolated from the room.
Radial Centrifugal Compression (Up to 830 Pa)
Air enters the center of the backward-curved impeller wheel. High-speed rotation flings the air outward against the spiral galvanized steel casing, building immense static pressure to overcome heavy duct resistance.
Ultra-Long Duct Reach (Up to 250 Feet)
The pressurized air exits the circular metal spigot with high kinetic energy, driving smoothly through flexible aluminum or rigid spiral ducts, multiple 90° bends, vertical risers, and exterior gravity louvers.
Continuous Airstream Motor Cooling
The external rotor motor sits inside the airstream, utilizing the flowing air for continuous convection cooling. This unique design prevents thermal throttling and protects the precision ball bearings over decades of use.
Compare Technical Specifications by Model
All performance figures are verified single-speed operating data tested at 220 V / 50–60 Hz. Select a model below to compare airflow, static pressure, and electrical ratings.
| Nominal Duct Diameter | 100 mm (4") · 100 mm Spigot Ø |
|---|---|
| Airflow Capacity | 235 m³/h · 138.3 CFM |
| Static Pressure | 350 Pa |
| Noise Level @ 3m | 47 dB(A) |
| Input Power | 72 W |
| Motor Speed | 2650 RPM |
| Operating Voltage | 220 V (50/60 Hz), Single Phase |
| Motor Protection Rating | IP44 |
| Motor Architecture | External Rotor Motor |
| Bearing Type | Dual Ball Bearings (40,000 hrs) |
| Casing Material | Heavy-Duty Galvanized Steel |
| Nominal Duct Diameter | 125 mm (5") · 125 mm Spigot Ø |
|---|---|
| Airflow Capacity | 275 m³/h · 161.9 CFM |
| Static Pressure | 390 Pa |
| Noise Level @ 3m | 47 dB(A) |
| Input Power | 80 W |
| Motor Speed | 2650 RPM |
| Operating Voltage | 220 V (50/60 Hz), Single Phase |
| Motor Protection Rating | IP44 |
| Motor Architecture | External Rotor Motor |
| Bearing Type | Dual Ball Bearings (40,000 hrs) |
| Casing Material | Heavy-Duty Galvanized Steel |
| Nominal Duct Diameter | 150 mm (6") · 148 mm Spigot Ø |
|---|---|
| Airflow Capacity | 450 m³/h · 264.9 CFM |
| Static Pressure | 450 Pa |
| Noise Level @ 3m | 46 dB(A) |
| Input Power | 94 W |
| Motor Speed | 2770 RPM |
| Operating Voltage | 220 V (50/60 Hz), Single Phase |
| Motor Protection Rating | IP44 |
| Motor Architecture | External Rotor Motor |
| Bearing Type | Dual Ball Bearings (40,000 hrs) |
| Casing Material | Heavy-Duty Galvanized Steel |
| Nominal Duct Diameter | 200 mm (8") · 200 mm Spigot Ø |
|---|---|
| Airflow Capacity | 830 m³/h · 488.5 CFM |
| Static Pressure | 550 Pa |
| Noise Level @ 3m | 53 dB(A) |
| Input Power | 157 W |
| Motor Speed | 2550 RPM |
| Operating Voltage | 220 V (50/60 Hz), Single Phase |
| Motor Protection Rating | IP44 |
| Motor Architecture | External Rotor Motor |
| Bearing Type | Dual Ball Bearings (40,000 hrs) |
| Casing Material | Heavy-Duty Galvanized Steel |
| Nominal Duct Diameter | 315 mm (12") · 315 mm Spigot Ø |
|---|---|
| Airflow Capacity | 1200 m³/h · 706.3 CFM |
| Static Pressure | 830 Pa |
| Noise Level @ 3m | 60 dB(A) |
| Input Power | 230 W |
| Motor Speed | 2660 RPM |
| Operating Voltage | 220 V (50/60 Hz), Single Phase |
| Motor Protection Rating | IP44 |
| Motor Architecture | External Rotor Motor |
| Bearing Type | Dual Ball Bearings (40,000 hrs) |
| Casing Material | Heavy-Duty Galvanized Steel |
Centrifugal Pressure vs Airflow
Steep pressure curves ensure continuous extraction across long ducts up to 250 ft.
Casing Measurements & Mounting Clearances
Check spigot collar diameters, casing dimensions, and minimum void requirements before framing false ceilings or mounting brackets.
| Spigot Collar Ø (A) | 100 mm (fits standard 100 mm / 4" round duct) |
|---|---|
| Casing Outer Ø (B) | 240 mm |
| Spigot Collar Lip (C) | 23 mm |
| Total Body Length (D) | 195 mm |
| Recommended Ceiling Void | 250 mm minimum clearance |
| Spigot Collar Ø (A) | 125 mm (fits standard 125 mm / 5" round duct) |
|---|---|
| Casing Outer Ø (B) | 240 mm |
| Spigot Collar Lip (C) | 26 mm |
| Total Body Length (D) | 190 mm |
| Recommended Ceiling Void | 250 mm minimum clearance |
| Spigot Collar Ø (A) | 148 mm (fits standard 150 mm / 6" round duct) |
|---|---|
| Casing Outer Ø (B) | 278 mm |
| Spigot Collar Lip (C) | 25 mm |
| Total Body Length (D) | 200 mm |
| Recommended Ceiling Void | 290 mm minimum clearance |
| Spigot Collar Ø (A) | 200 mm (fits standard 200 mm / 8" round duct) |
|---|---|
| Casing Outer Ø (B) | 330 mm |
| Spigot Collar Lip (C) | 33 mm |
| Total Body Length (D) | 215 mm |
| Recommended Ceiling Void | 340 mm minimum clearance |
| Spigot Collar Ø (A) | 315 mm (fits standard 315 mm / 12" round duct) |
|---|---|
| Casing Outer Ø (B) | 395 mm |
| Spigot Collar Lip (C) | 30 mm |
| Total Body Length (D) | 245 mm |
| Recommended Ceiling Void | 410 mm minimum clearance |
Common Questions About Dwell DCIF PRO
Clear, factual answers on sizing, acoustics, duct layout limits, and multi-point ventilation.
When should I choose DCIF PRO over a mixed-flow fan like MIX PRO?
Choose MIX PRO for standard residential duct runs under 30 feet where ultra-low noise is the top priority. Choose DCIF PRO when your exhaust duct route exceeds 30 feet (up to 250 ft), when venting vertically up building shafts, when extracting grease and heat from kitchens, or when connecting multiple washroom intake points to one central fan that needs high static pressure (up to 830 Pa).
Can one DCIF PRO fan ventilate multiple bathrooms or multiple points in one bathroom?
Yes. This is one of the biggest advantages of DCIF PRO. Because its centrifugal impeller develops massive static pressure, you can run branch ducting from a single DCIF 150 PRO or 200 PRO to pull air simultaneously from a shower enclosure and a WC, or from two separate adjacent washrooms. Sizing the fan correctly ensures strong, balanced suction at every grille.
Why is a galvanized steel metal casing better for ducted ventilation?
Galvanized steel offers superior rigidity, fire resistance, and dimensional stability. It withstands warm cooking exhaust, resists building settling vibrations, and does not crack or degrade in dark, humid service shafts. It also provides excellent acoustic dampening against low-frequency motor hum.
How far can the DCIF PRO push exhaust air?
The DCIF PRO is engineered to maintain active air velocity across duct runs up to 250 feet, overcoming the resistance of internal duct friction, multiple 90° elbows, flexible duct corrugations, and exterior gravity louvers.
Does the fan require an external speed controller?
No. Dwell recommends selecting the exact fan model that matches your room volume and duct layout so the fan operates at its peak aerodynamic efficiency on a standard single-speed switch. This eliminates unnecessary controller costs, humming motor noise from low-cost triac dimmers, and complex electrical wiring.
How do I maintain the fan once the false ceiling is closed?
Always install a standard 300 × 300 mm access panel in the false ceiling directly beneath the fan. The fan external rotor motor and backward-curved impeller naturally resist dust and grease accumulation. During routine annual maintenance, open the inspection hatch and wipe down the impeller blades without dismantling the duct connections.
Certificates, Manuals & CAD Drawings
Access certified user manuals, dimensional drawings, and CAD blocks to integrate Dwell DCIF PRO directly into your architectural layouts and MEP schematics.
Installation Manual
Wiring schematics, mounting bracket dimensions, electrical connection protocols, and safety guidelines.
Download Manual (PDF)Product Specification Brochure
Detailed aerodynamic performance curves, acoustic ratings, and dimensional data across all sizes.
Download Brochure (PDF)2D CAD Drawings (.DWG)
CAD drawing blocks for ceiling plenum coordination and duct integration:
Need duct resistance calculations or assistance with multi-point layouts?
Connect with our technical ventilation desk for sizing calculations, multi-unit project pricing, or CAD duct layouts.