Passive Filtration
15 Feb 2026
Filtration ROI: How to Justify Your Kitchen Extract Upgrade
Use energy, cleaning and risk reduction to build a credible ROI for kitchen extract upgrades — especially when moving to ESP + carbon (+ ozone if needed).
Upgrading filtration isn’t just a hygiene exercise — it’s a financial decision. When you move to ESP + carbon (and ozone where needed), " "you can reduce energy, cleaning and complaint‑related downtime. Here’s a simple way to quantify the return.
Where the savings come from
Energy : ESP has inherently low ΔP compared with dense mechanical filters; the fan does less work. Cleaning : Effective particulate control keeps ducts cleaner for longer under TR19 regimes. Complaints/downtime : Better odour control reduces enforcement risk and lost trading hours.
A quick ROI model
Baseline current costs — fan energy (kWh), duct cleaning frequency, odour call‑outs, emergency visits. Model new ΔP and maintenance intervals with ESP + carbon (+ ozone if required). Add a reasonable risk reduction value for fewer complaints and disruptions.
Making the brief watertight
State the required performance outcomes (capture efficiency, odour at boundary) rather than brand names. Include commissioning evidence: airflow, ΔP, interlocks, leakage checks. Attach a maintenance plan and logs to keep results steady over time.
Tell the full story
Pair the numbers with practical benefits: cleaner canopies and ducts, happier neighbours, and fewer Friday‑night emergencies. "
"For help with a tailored business case, try our ROI calculator or ask for a "
"free odour assessment.
Emergency ESP Replacement Following Restaurant Fire
Emergency ESP Replacement Following Restaurant Fire Project Overview Extechnology was appointed to supply a rapid replacement ESP solution following a fire at a commercial restaurant kitchen. The fire had damaged the existing extraction and filtration equipment, leaving the restaurant unable to operate until the system was replaced. With business downtime directly affecting revenue and day-to-day operations, the project required a fast and straightforward solution that would allow the restaurant to reopen as quickly as possible. As the existing extract system had already been designed around a specific airflow requirement, the replacement ESP equipment needed to provide a like-for-like solution that could integrate easily into the existing setup without unnecessary redesign work or site modifications. The Challenge The restaurant required an urgent replacement of the damaged ESP equipment within a very short timeframe in order to minimise disruption to the business. Key challenges included: Rapid specification and supply of replacement ESP equipment Minimising operational downtime and financial losses Matching the existing airflow and system performance requirements Avoiding unnecessary ductwork or system alterations Supporting a fast-track installation and recommissioning programme With pressure to reopen quickly, maintaining speed throughout specification, processing and delivery was critical to the success of the project. The Solution Extechnology worked closely with the client and installation team to quickly identify a suitable like-for-like ESP replacement based on the existing system airflow and operational requirements. Using the original system information, the replacement ESP unit was selected to maintain the required airflow performance while integrating directly into the existing extraction arrangement. This simplified both specification and installation, avoiding delays associated with redesign or major system modifications. The focus throughout the project was to keep the process straightforward and efficient. Once the system requirements were confirmed, the replacement ESP equipment was rapidly processed and delivered within a short lead time to support the installation programme and help return the kitchen to operation as quickly as possible. Technology Used Like-for-like commercial kitchen Electrostatic Precipitator (ESP) Existing extraction system airflow configuration retained Washable ESP filtration technology for grease and smoke removal Compatible integration with existing ductwork and extraction layout Project Outcomes Rapid turnaround from enquiry to delivery Minimal downtime for the restaurant Fast-track installation and recommissioning Reduced disruption and business losses Successful reopening within a short timeframe Happy client and fully operational kitchen Consultant Notes The replacement ESP equipment was selected to match the airflow and operational characteristics of the original system, allowing the installation to proceed without significant modifications to the existing extract arrangement. By maintaining a like-for-like approach, the project avoided unnecessary complexity and enabled a faster overall delivery and installation programme, helping minimise disruption to the client’s business operations.
Hook, Camden Town
Extechnology delivered an odour control solution to support planning and neighbour acceptance while keeping pressure drops predictable.
Hoxton Hotel, Holborn
High‑efficiency ESP stages with low static and washable cells, supporting reliable operation and simplified servicing for a busy hospitality environment.
