Local extract & compact duct fans
Bathroom, WC, utility, kitchen-support and inline extract duties with backdraft and duct-resistance allowance.
Residential Ventilation
Residential ventilation is a coordinated family of local extract, fresh-air, balanced and energy-recovery solutions. RAFAVENT selects each path by airflow, resistance, acoustics, controls and documented supply scope.
Fresh-air & balanced systems
Filtered outdoor-air supply or coordinated supply/extract with room-pressure and control strategy defined by the project.
Central, roof & HRV/ERV solutions
Apartment central exhaust, residential roof fans and heat/energy recovery units only within an exact documented proposal.
Residential ventilation product paths
| Product path | Typical airflow envelope | Pressure envelope | Primary selection criteria | Publication status |
|---|---|---|---|---|
| Bathroom / service extract | 50–350 m³/h | 30–180 Pa | Sound, backdraft protection, humidity | Exact model data required |
| Compact inline duct fans | 100–1,000 m³/h | 50–500 Pa | Duct resistance, access, speed control | Cross-reference Inline Duct Fans |
| Fresh-air units | 100–1,500 m³/h | 100–600 Pa | Filter ΔP, outdoor condition, sound | Project-specific configuration |
| Balanced supply & extract | 150–2,000 m³/h | 100–650 Pa | Air balance, controls, commissioning | Project-specific configuration |
| HRV / ERV units | 150–2,000 m³/h | 100–650 Pa | Certified recovery data, leakage, frost/condensate | Only with exact supplier/unit documentation |
| Central / residential roof extract | 500–5,000 m³/h | 100–700 Pa | Riser resistance, fire strategy, roof termination | Project-specific; code review required |
Air-path and installation allowances
| Item | Engineering allowance |
|---|---|
| Duct route | Straight length, elbows, transitions and flexible duct |
| Terminals | Grilles, valves, louvers and weather hoods |
| Protection | Backdraft damper, insect screen and rain protection |
| Filtration | Filter class and clean/final pressure drop when applicable |
| Acoustics | Room target, breakout noise, duct-borne noise and attenuation |
| Maintenance | Access, cleaning, filter replacement and condensate management |
Controls and operating modes
| Mode | Requirement |
|---|---|
| Basic control | On/off or switched with room service |
| Speed control | Only with a compatible motor/controller combination |
| Demand control | Humidity, CO₂, occupancy or timer sensor as project option |
| Boost mode | Defined high-speed duty and run-on period |
| BMS interface | Dry contact, 0–10 V or protocol only when documented |
| Electrical safety | Isolation, protection and wiring coordinated to local rules |
Available fan pressure ≥ duct + fittings + terminals + dampers + filters (clean/final) + project reserve
Required project data
| Input | Required detail |
|---|---|
| Air duty | Required airflow and external static pressure at each mode |
| Design basis | Room volume, occupancy and required ventilation rate from the governing code |
| Environment | Temperature, humidity, grease, lint, corrosive content and outdoor exposure |
| Installation | Wall/ceiling/duct position, connection size, route and access |
| Sound | Maximum room and external sound target at the stated distance |
| Supply scope | Fan, terminals, filters, dampers, controls and commissioning requirement |
RAFAVENT
Engineering boundary: Published values are preliminary calculated, non-certified selection envelopes. Final airflow must be checked against the complete duct resistance. Ventilation rates, indoor-air-quality outcomes, heat-recovery efficiency, acoustic performance and regulatory compliance are not implied and require the exact selected equipment, governing local code and project evidence.