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The What, Where, Why + How of Kitchen Grease. February 3, 2020



Kitchen grease dripping down exhaust system


What is kitchen grease?

Kitchen grease is the sticky residue that creeps its way around our kitchens, filling every crack, coating every surface, until suddenly we realise we are drowning in a thick yellow danger zone.  It is the bane of any chef’s life, but no matter how hard we try, none of us can escape it. 


Where does kitchen grease come from?

If it seems like this dreaded filth appears from everywhere, that’s because it does!  Roasting.  Cooking.  Baking.  Frying.  That’s about as greasy as you can get.  Evidently, every common form of cooking will disperse some amount of grease into your precious breathing air.  Different cooking methods discharge different amounts of grease.


Heavy discharge:  Char grill, Wok tables, Griddle plates

Medium discharge: Countertop Units, Deep Fryers

Low discharge: Combi Oven, Oven Ranges



evidence of incomplete duct clean
Examples of grease coating kitchen extraction system interiors.


Why is kitchen grease a problem?

Grease is nearly impossible to get rid of problem-free.  When washed down the drain, large amounts can build up and solidify, causing unsightly blocked drains.  This can result in unattractive sewer backups and overflows.  Even if drains don’t block, grease coats pipe interiors and decreases capacity.  This means water systems need to be cleaned, or even replaced, far more frequently than desired. 

However, not all kitchens wash their grease down a drain.  Unfortunately, cleaning filters in a dishwasher can be just as agonising.  Grease from the filters sneaks up to coat the drains and pumps, causing a slow, painful death for your hard-working appliance.  Alternatively, washing the grease into a trap is an expensive pastime that can cost up to x every time you have to clean it out. 

Lastly, what no one but duct cleaners discuss, is the detriment grease brings to extraction systems.  It shrouds the fan, decreasing efficiency.  It coats the entire ducting.  And it spills out onto the roof, creating one disgusting mess.  Meanwhile, anything over 2mm of grease build-up is plenty of fuel to burn down an entire kitchen in minutes, should a spark catch it alight! 


How to deal with kitchen grease.

But…it’s not all as doom and gloom as it sounds.  Every kitchen owner has to deal with grease and that is why we are so thankful for ways that eradicate the pain. 

The easiest place to deal with grease is in the filter.  This way, it doesn’t enter the duct requiring expensive cleans and creating colossal fire risk.  It doesn’t attach itself to every surface in the entire kitchen.  It doesn’t hang in the air making staff hesitant to inhale. 


Shepherd Filters are an innovative solution to all your kitchen grease nightmares.  They are natural, woollen, disposable, compostable, fire retardant and can capture up to 98% of airborne kitchen grease, compared to the 20-40% of a standard filter. 


shepherd filter with airah badge 2


Learn more about them on our blog or view the product page here.


About the Author:

Saskia Prestidge is a content marketer, passionate about critical hygiene in the food industry. 

Amazed by the team’s extensive experience, Saskia is on a mission to squeeze the knowledge from their heads and share it with the food industry. 

Saskia would love to hear from you.  Find her at saskia@presco.co.nz


2 responses to “The What, Where, Why + How of Kitchen Grease.”

  1. children says:

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    • Saskia Prestidge says:

      Thank you for your feedback. We are constantly working to improve our site, and images/videos is one of the things I am working on currently.
      Watch this space 🙂

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