Get Your Heating System Sized Properly
Most Heating Systems Are the Wrong Size
Too many homes are running systems that were never properly calculated.
Boilers and heat pumps are often oversized or undersized
-Rooms heat unevenly or struggle to stay warm
-Energy bills are higher than they should be
-Installers rely on estimates instead of real data
Without a proper heat loss calculation, you’re guessing, and it costs you.
Accurate Surveys by Qualified Heating Engineers
At Helios Gas, we carry out detailed heat loss calculation surveys to UK standards, giving you the data needed to design your system correctly.
-Room-by-room heat loss calculations
-Assessment of insulation, windows, walls, and ventilation
-Designed in line with UK standards (BS EN 12831)
-Suitable for boilers, heat pumps, and full system upgrades
A professional survey ensures your heating system is sized correctly for your property, improving comfort, efficiency, and long-term performance.
How We Assess Your Property
Full Property Survey
We measure each room, assess insulation levels, and evaluate how heat escapes from your home.
Detailed Calculations
We calculate heat loss for every room, factoring in temperature differences, ventilation, and building fabric.
System Design Guidance
We provide clear recommendations for the correct boiler, heat pump, or heating system size.
A proper survey typically includes measuring walls, windows, insulation, and airflow, not just a quick estimate.
The Difference You’ll Feel
A Heating System That Actually Works Properly
Even, consistent heating in every room
Lower energy bills through improved efficiency
Correctly sized boiler or heat pump
Better system performance and lifespan
Skipping This Step Leads to Expensive Mistakes
Oversized systems waste energy and cost more to run
Undersized systems struggle to heat your home
Poor design leads to ongoing comfort issues
You may not meet current UK building regulations
In fact, UK regulations now require proper heat loss calculations before installing new heating systems.
Book Your Heat Loss Calculation Survey Today
Get the numbers right before you invest in your heating system.
The Helios Difference
Designed for Accuracy.
Built for Performance.
Detailed, room-by-room calculations
Based on real measurements, not estimates
Suitable for boiler upgrades, heat pumps, and full system design
Trusted by homeowners and installers across Northern Ireland
