The blower motor creates the pressure difference that moves air through the filters, coil, plenum, branch ducts and room outlets. Correct airflow keeps rooms balanced and protects the refrigeration circuit.
FixakitchenHVAC ducting and fabrication
Custom duct fabrication Cape Town
Custom Duct Design and Sheet Metal Fabrication
Bespoke galvanized sheet metal plenum boxes, square duct networks, transition branches and ducted AC routing designed around the actual building structure. We focus on mechanical layout, service access, structural supports, static pressure, air balancing and long-term maintainability.
Mechanical engineering mindset
Ductwork planned around structure, pressure and airflow
A ducted AC system is not just a box and a grille. The plenum volume, branch geometry, turning losses, damper access, ceiling void, support points and return-air path all affect performance. We custom-design and fabricate HVAC sheet metal plenum boxes, transition pieces and square duct sections so the installation fits the building instead of forcing off-the-shelf ducting into a difficult space.
FabricationGalvanized plenum boxes, square duct, transition branches, take-offs and access panels
Mechanical layoutStructural supports, service clearance, ceiling void routing and coordinated duct paths
PerformanceStatic pressure thinking, air-balance dampers, duct sealing and return-air planning
Air handler science
The air handler is the heart of the ducted system
The air handler does not simply "blow air". It pulls return air from the building, moves it across filters and coils, then pushes conditioned air through the duct network. If the air handler, ductwork and return path are not designed together, comfort, noise level, efficiency and indoor air quality all suffer.
A typical air handler may include a blower wheel, motor, evaporator coil, condensate tray, filters, sensors and dampers. Each part affects static pressure, cooling capacity, moisture removal and service access.
Single-speed, multi-speed and variable-speed air handlers behave differently. Variable-speed systems can improve comfort and energy use by matching airflow more closely to load instead of running full blast.
Weak airflow, uneven rooms, noisy ducts, dirty filters, blocked coils, water leaks or rising energy use can point to air-handler problems. Maintenance should include filter condition, coil cleanliness, drain flow, blower load and duct leakage checks.
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Custom duct design and sheet metal fabrication
We fabricate bespoke galvanized sheet metal components for HVAC and extraction projects: plenum boxes, square duct runs, transition branches, offsets, reducers and serviceable duct sections tailored to your building layout.
- Custom duct fabrication Cape Town
- HVAC sheet metal plenum boxes
- Transition branches and ducted AC routing
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Commercial and residential turnkey installations
From high-end residential hideaway inverters to large open commercial spaces, we manage the mechanical installation route: brackets, supports, condensate paths, air-balance dampers, duct sealing and final airflow checks.
- Ducted AC system installation
- Open-plan commercial cooling layouts
- Structural supports and precise duct routing
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Preventative HVAC maintenance and optimisation
Keep systems efficient and air movement stable with planned maintenance: deep coil chemical washing, custom air filter replacements, duct sealing, static pressure checks, damper adjustment and energy-efficiency auditing.
- Commercial air conditioning maintenance Western Cape
- Static pressure balancing and duct sealing
- Server room cooling and maintenance
System detail
The parts that make a ducted system work properly
Good ducted AC work depends on more than the indoor and outdoor units. The sheet metal, diffuser boxes, duct route, return path and access points decide whether the system can move air quietly and be maintained later.
Compliance and sign-off
Correct scope, correct artisan, correct certificate
Our service model respects the South African Pressure Equipment Regulations without limiting the size of the project we can take on. Fixakitchen manages the mechanical design, ducting, sheet metal, installation coordination and site execution, while regulated refrigeration commissioning and CoC sign-off are brought under the correct authorised refrigeration gas practitioner for the scope. For larger commercial systems, that means coordinating with trusted Category B, Red Seal and accredited refrigeration artisans where required.
Mechanical scopeDesign, duct fabrication, supports, routing, access and installation coordination managed as one project
Accredited artisanCategory B, Red Seal or authorised refrigeration practitioners brought in when the regulated scope requires it
CoC routeCertificates of Conformity are issued by the authorised practitioner responsible for the refrigerant-side work
Request a quote
Send the details that make the design accurate
For custom ducting, ducted AC, commercial cooling or maintenance pricing, send photos and the technical context. Good information at the start makes it easier to size ductwork, plan supports, estimate access time and allocate the correct accredited artisan for commissioning and final sign-off where regulated refrigeration work is involved.
SpaceRoom size, ceiling height, floor area, roof void and whether the area is open-plan or divided.
Heat loadCooking equipment, people count, server racks, sun exposure, glass area and any existing AC capacity.
Duct routePhotos of ceilings, beams, bulkheads, roof access, duct path, return-air location and drain route.
ComplianceRequired cooling capacity, refrigerant type if known and whether a CoC or commercial sign-off is needed.