Project Overview

Extechnology was appointed to deliver a high-performance odour control solution for a commercial kitchen installation in Camden Town. The project required a system that would satisfy planning conditions and neighbouring receptors while maintaining predictable system resistance to support efficient fan selection and long-term operational reliability.

Given the dense urban environment, the solution needed to balance effective grease, smoke and odour removal without introducing excessive pressure drop or complex ductwork modifications.

The Challenge

The site is located in a high-density urban area with nearby residential and commercial receptors in close proximity to the kitchen discharge point. Available duct runs were limited, restricting opportunities for extended filtration stages or re-routing.

Key challenges included:

• Minimising odour impact at discharge to prevent nuisance complaints

• Maintaining low and predictable pressure drop across the system

• Accommodating filtration and odour control equipment within restricted space

• Ensuring ongoing compliance with maintenance and fire safety requirements

The Solution

Extechnology designed and supplied a multi-stage filtration and odour control system tailored to the kitchen duty and site constraints.

Primary grease separation is achieved at the canopy level using baffle and mesh filters to remove larger grease particulates at source. This is followed by a correctly sized electrostatic precipitator (ESP) stage, providing high-efficiency removal of grease aerosols and smoke without significant resistance to airflow.

To address odour without increasing static pressure, an off-duct UV-C/ozone injection system (ECOVENT) was introduced. This allows effective treatment of odorous compounds within the airstream while avoiding the pressure losses typically associated with in-line filtration stages.

A final activated carbon polishing stage using Site Safe carbon cartridges was incorporated downstream to neutralise residual odours and quench any remaining ozone, ensuring a clean and compliant discharge to atmosphere.

Technology Used

• RY5000B Electrostatic Precipitator (ESP) for grease and smoke removal

• ECOVENT UV-C off-duct ozone injection system for odour treatment

• Site Safe activated carbon modules for final odour polishing and ozone quenching

• Pleated and bag pre-filters installed upstream of the carbon stage to protect media life and performance

Project Outcomes

• Significant reduction in perceived odour at the discharge point

• Clean, visually clear exhaust with no grease fallout on the building façade

• Predictable system static pressure enabling straightforward fan selection

• Reduced fire risk and improved duct cleanliness

• Planned maintenance strategy aligned with TR19, incorporating washable and accessible filtration stages

Consultant Notes

The system was designed to maintain recommended face velocity across the ESP cells, ensuring optimal dwell time and collection efficiency. Differential pressure monitoring points were included at the carbon stage, along with BMS and alarm interlocks to support ongoing performance monitoring and maintenance compliance.