Equipment Deep Dive

Aeroseal duct sealing — what you should know

What it is. Aeroseal is an automated duct-sealing approach used in residential and commercial buildings. A certified technician pressurises the duct network and introduces a specialised, low-toxicity aerosol sealant. Sealant particles are carried to leakage paths and accumulate at the edges of gaps, forming a lasting seal from the inside — without coating the entire duct surface.

In practical terms for your team: instead of patching obvious leaks only, the process targets leakage across the tested system more systematically.

Why it can matter for your restaurant

Commercial kitchens often run extraction and ventilation for many hours each day — sometimes alongside comfort cooling or heating. Industry studies commonly cite substantial duct leakage in commercial buildings (order-of-magnitude ~30% of conditioned or moved air in some inventories). Hidden leakage means fans and plant work harder, comfort can drift, and energy spend rises even when hoods “look” correctly sized.

If you operate high-duty extraction (including gas-flame-intensive lines such as traditional wok cooking), reducing duct leakage may help extraction and HVAC interact more efficiently. Your savings will depend on your current leakage, airflow design, tariff, controls, and how much of the leakage is reachable and testable.

Sealed duct paths can trim fan-energy waste and unrelated heating/cooling burdens where leaks were forcing oversized airflow or conditioning. Any gas heating savings are site-specific.

How the process typically works

• Technicians isolate and pressurise the duct sections included in scope.
• A fine aerosol travels through the ducts; polymer particles adhere first at leakage edges rather than uniformly lining the duct.
• For many commercial scopes, onsite work commonly completes within a compact window — your contractor should clarify shutdowns or access arrangements.

Outcomes operators often cite (sanity-check with modelling)

In European benchmarking material, leakage rates have reportedly been reduced by very large percentages in studied projects — your facility may differ sharply. Contractors and regional studies may quote wide ranges (roughly 20–40% savings on HVAC or fan-energy components in some retrofit narratives). Treat every figure below as a planning guide; validate with blower-door / duct-testing baselines before and after, and reconcile against your metering.

The Netherlands — is Aeroseal available?

Yes, Aeroseal has been marketed in European markets since the mid‑2010s. Documented sealing projects span many countries across the region.

To identify a contractor for your postcode, review the distributor’s locator on aeroseal.com/europe (typically “Find a Pro” style search by country).

Complementary actions (alongside Aeroseal)

• Equipment door seals: Have your crew routinely inspect oven doors, refrigerators, steamers and hot-hold chambers — softened gaskets inflate electrical and thermal bills.
• Kitchen hood filters: Grease-loaded filters increase static pressure — fans escalate kWh demand. Maintain a disciplined clean/replace rhythm consistent with manufacturers and fire-safety regimes.
• Fresh-air and air-handling filters: Follow service intervals where appropriate; clogged media adds fan load across the broader plant.

At-a-glance summary

Figures summarise industry marketing and tertiary studies — they are not a guarantee for your site. Commission a leakage survey, agree scope with a certified Aeroseal partner, then compare half-hourly or daily energy before versus after normalization for weather covers.

If you would like support finding a Netherlands-based certified installer, scoping leakage testing, or building a concise payback appendix for landlords or investors, ask your usual Greenways contact and we will line up next steps.