Retrofitting ESP Units into Existing Commercial Kitchen Extraction Systems

Retrofitting ESP units into existing commercial kitchens is a common requirement, particularly where odour complaints, planning conditions, or fire risks need to be addressed. However, successful retrofits require careful consideration of space, airflow and installation constraints.

Allowing Space for Ductwork Adaptors

One of the most common retrofit issues is insufficient space for ductwork transitions between existing ductwork and the ESP unit. Properly designed adaptors are essential to maintain airflow performance and prevent turbulence.

Adequate space must be allowed for smooth reducers or expanders, straight duct runs into the ESP, and access for maintenance and removal. Attempting to force an ESP into a confined space without suitable duct transitions can severely reduce performance.

Understanding Existing Airflow and Fan Capability

Before specifying an ESP retrofit, the existing fan duty and duct sizes must be assessed. The ESP introduces additional resistance into the system, which the fan must be capable of overcoming while still delivering the required airflow.

Failure to account for this can result in reduced canopy capture, poor ESP performance, and increased system noise.

Practical Installation Constraints

Retrofit projects must also consider restricted plantroom or ceiling space, safe delivery of equipment to site, and structural access limitations. Correct ESP selection and early coordination are key to avoiding costly installation issues.