Kair Kalahari ECO Positive Input Ventilation Loft Unit
The Kair Kalahari ECO is an advanced loft-mounted Positive Input Ventilation (PIV) system designed to improve indoor air quality, reduce condensation, and help prevent black mould. Drawing in filtered air from the loft space, it gently ventilates the entire home, improving air circulation while maintaining energy efficiency. The unit features intelligent temperature control, adjustable speed settings, and is available with or without integrated heating (HCS model). It is suitable for both single and multi-storey dwellings.
Product Features
Improves air quality and reduces humidity by supplying filtered fresh air into the home
Intelligent loft temperature sensor with 5 selectable modes (standby, heat recovery, normal, and more)
6 adjustable speed settings for different property sizes (up to 60 l/s)
Optional heater version (HCS) includes a 400W inline heater with ceiling vent controls
Whisper-quiet operation with vibration-reducing mounting kit (optional)
Filters last up to 5 years (reminder displayed on control panel)
Designed for continuous operation with ultra-low running costs
Backed by a 7-year warranty (KWH150-ECO-HEAT-HCS) or 5-year warranty (KWH150-ECO-LC)
General Product Information
The Kalahari ECO range works on the Positive Input Ventilation principle: drawing air from the loft, filtering it, and delivering it at ceiling level to create a constant, gentle circulation. This helps remove stale, moisture-laden air and replace it with fresher, drier air from outside.
Energy Efficiency
Operating at just 1.6W (minimum) and up to 15.3W (maximum without heater), the Kalahari ECO is designed to deliver whole-house ventilation with minimal energy use. The heater model consumes up to 422W when the heating element is active and only when required.
Health Dividend
By tackling condensation and damp at the source, the Kalahari helps prevent black mould, improves air quality, and reduces allergens and pollutants within the home. It’s especially effective in properties prone to trapped moisture or without sufficient natural airflow.
How It Works
The fan unit pulls air from the loft space and gently distributes it into the home via a ceiling diffuser. The air is filtered and temperature-regulated using an internal loft temperature sensor. The HCS model includes a heater with thermostat and user control located in the diffuser. All models adjust fan speed automatically based on chosen settings.
Control
6 fan speeds (10 to 60 l/s) selectable via UP/DOWN buttons
5 intelligent temperature control options
HCS version includes user-accessible ceiling vent with LED display
Optional heater activation (5–15°C set point)
Filter change reminder (5-year cycle)
Installation Instructions
The fan unit is typically suspended from the roof joists using the provided cord or optional anti-vibration mount. A flexible 100mm duct connects the unit to the ceiling diffuser, which is installed centrally in a hallway or landing. Heater models require additional wiring and a ceiling-mounted controller.
Product Specifications
Airflow: 10 to 60 l/s (Speed 1–6)
Power Consumption: 1.6W–15.3W (422W with heater)
Weight: 3.5kg
IP Rating: IPX2
Filter Life: 5 Years (part no: KWH150-ECO-FLT)
Duct Size: 100mm
Diffuser: Elliptical ceiling vent with air dams
Mounting: Cord hung or AV kit (optional)
Product Maintenance
Maintenance is minimal. The internal filter should be replaced every 5 years, or when prompted by the on-board display. Replacement filters are available from Kair. The unit should be visually inspected periodically to ensure clear airflow and correct operation.
Electrical Safety
Must be installed by a qualified electrician. 230V mains connection via fused spur. HCS models require safe connection of heater loom and interconnects between diffuser and fan. Disconnection point with 3mm contact separation required.
Regulations
Conforms to IEE wiring regulations
Complies with Building Regulations for ventilation (Approved Document F)
CE and UKCA marked
WEEE and RoHS compliant
Performance
Speed 1: 10 l/s
Speed 2: 20 l/s
Speed 3: 30 l/s
Speed 4: 40 l/s
Speed 5: 50 l/s
Speed 6: 60 l/s
Product Dimensions
Unit Weight: 3.5kg
Flexible Duct Length: up to 2m
Diffuser: Elliptical cut-out with 4-point screw mount and press-fit cap
Performance Specifications
HCS model heater activates only when temperature drops below user setpoint
Intelligent Heat Recovery mode available in most temperature control settings
Unit reverts to standby mode when loft air becomes too warm
WHY SPECIFY Kair™
Kair is a trusted UK ventilation brand known for easy-to-install, energy-efficient systems backed by long warranties and technical support. The Kalahari ECO series offers homeowners a cost-effective, low-maintenance solution to eliminate damp, mould, and poor indoor air.
Available Accessories
Replacement filter: KWH150-ECO-FLT
Anti-vibration mounting kit: Part No. 771393
3-storey aluminium ceiling diffuser (required for properties with floor heights over 4.5m)
Flexible ducting (100mm) and fixing accessories