Maximize Fired Heater Performance and Reliability with Proven Solutions
Patented technology • Measurable ROI • Trusted by top refineries
Furnace Improvements Services (FIS) has been helping refineries improve the efficiency, reliability, and performance of fired heaters for over 30 years. With a focus on solving complex design and operational challenges in the oil and gas industry, our team brings deep engineering expertise backed by proven, patented technologies.
Our Clients
Phillips 66
Valero
Total Energies
LyondellBasell
Marathon
Citgo
Indian Oil (IOCL)
and 50+ others
By the Numbers
500+
Heater Projects Completed
30
Years in Business
15
Countries Served
4
Patented Technologies
2
Global Offices
Why FIS?
An independent firm with deep roots in fired heaters and thermal equipment
Since 1996, FIS has focused exclusively on fired heaters, revamps, new designs, SMR engineering, and training. All engineering is performed in-house: process, mechanical, structural, CFD, and 3D modelling. No subcontracting the work that matters.
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We combine practical, field-tested expertise with proprietary heater models and advanced analysis tools such as CFD and simulation software to deliver the best heater designs.
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For over 30 years, our business has been dedicated to fired heaters. This experience informs every project we undertake, particularly new heater designs, where we anticipate and prevent common failure modes and operational issues.
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Solving the toughest heater challenges often requires thinking beyond conventional approaches. Our four patents reflect a commitment to testing and implementing new ideas and technologies.
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Our reputation is built on delivering results. This is demonstrated through our extensive reference list, repeat clients, and long-standing industry relationships.
How we work
Working with FIS doesn't require a fully scoped RFQ. Most projects begin with a conversation, you describe the challenge; we tell you honestly what engineering looks like and whether it's the right fit. Here's what to expect.
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Tell us your challenge or project. No formal brief needed, we ask the right questions and give you an honest view of the engineering options.
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We review your existing data , operating history, data sheets, inspection records, and define the engineering scope accurately.
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A detailed proposal: scope, deliverables, timeline, and cost, specific to your project. Not a template. If a study is the right first step, we say so.
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All disciplines in-house: process, mechanical, structural, CFD, and 3D modelling. One team, one point of contact, one integrated set of drawings.
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We stay engaged through procurement, fabrication review, and commissioning. US and India offices ensure support across time zones.
Our Clients
FIS has served clients such as Citgo, Valero, Phillips 66, Alon USA, Frontier, and Total Energies and many more
FIS Patented Technologies
Reduces flame impingement and
high tube metal temperatures
Increases capacity with limited
process side pressure drop
Safe & Reliable Draft
Control System
Testimonials
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