Great grilling is about more than just heat — it’s about flavour, technique, and the equipment used to bring it all together. At The Firehouse, one of the biggest secrets behind the kitchen’s signature taste is the Bertha charcoal oven.
Used by chefs across some of the world’s best restaurants, this oven brings a unique style of cooking that transforms steaks, seafood, and vegetables into bold, flavour-packed dishes.
What Is a Bertha Oven?
A Bertha oven is a professional charcoal oven designed specifically for high-heat cooking. Unlike standard grills or gas ovens, it burns natural charcoal to create intense temperatures and a distinctive smoky flavour.
The oven works like a combination of a grill and an enclosed oven. Heat circulates inside the chamber while the charcoal provides direct flame cooking, allowing chefs to sear ingredients quickly while locking in moisture.

The result is food that is crisp on the outside, tender on the inside, and packed with flavour.
Why Charcoal Cooking Tastes Better
Charcoal cooking is often considered the gold standard for grilling because it creates flavours that gas or electric cooking simply can’t replicate.
When ingredients cook over charcoal, natural juices drip onto the coals, creating smoke that rises back into the food. This process adds depth, smokiness, and complexity to every bite.
At Firehouse, this method is especially noticeable in their steaks and grilled dishes, where the charcoal oven creates that distinctive caramelised crust and rich grilled aroma.

High Heat, Perfect Results
One of the biggest advantages of the Bertha oven is the extremely high temperatures it can reach. This intense heat allows chefs to sear meats quickly while keeping the inside juicy and tender.
For steak lovers, this is essential. A good steak needs a strong sear to develop flavour while still cooking evenly through the centre.
The Bertha oven makes that possible, delivering the kind of restaurant-quality grilling that’s difficult to replicate at home.
More Than Just Steak
While the Bertha oven is famous for producing incredible steaks, it’s used across a variety of dishes in the Firehouse kitchen.
The same charcoal heat is used to cook:
- Gourmet burgers
- Grilled seafood
- Vegetables and sides
- Other flame-cooked menu favourites
Each dish benefits from the smoky flavour and high-heat cooking style that the oven delivers.
The Theatre of Cooking with Fire
Another part of the Bertha oven’s appeal is the theatre it brings to the kitchen. The glow of the charcoal, the aroma of smoke, and the fast-paced cooking create a sense of excitement that adds to the dining experience.
Guests at Firehouse often notice the energy coming from the open kitchen as chefs work with the charcoal oven — it’s a reminder that great food starts with great technique.

Want to try it for yourself?
Useful Links
If you’d like to explore the Firehouse experience further:
- Menu: https://thefirehouse.org.uk/menu
- Book a Table: https://thefirehouse.org.uk/book
- About Firehouse: https://thefirehouse.org.uk/about
- Latest Blog & News: https://thefirehouse.org.uk/blog
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Stay up to date with new dishes, cocktail creations, and behind-the-scenes moments from the kitchen.
For anyone searching for the best steak restaurants in Enniskillen or a dining experience centered around authentic charcoal grilling, the Bertha oven is a big part of what makes Firehouse stand out.
