Heat Loss Calculation — the Key to Proper Heating Equipment Selection
Incorrectly selected equipment costs you money every day. Boiler constantly turning on and off, radiators hot but house cold — these are all consequences of missing calculations. TermoFlo helps choose boiler capacity precisely for your home.
Boiler Frequently Cycles or Works to Exhaustion
Oversized boiler constantly shuts off — energy wasted on system warm-up. Undersized boiler works at capacity limit and fails quickly. Both scenarios result from missing heat loss calculations.
Hot Radiators but Cold Room
Radiators are blazing, heating bills are high, but house remains cold. Problem isn't radiators — their quantity or capacity doesn't match actual room heat losses. Solution — accurate calculation.
Why do these problems occur?
Incorrectly selected heating equipment is the most common renovation mistake. Contractors often use simplified '100W per square meter' calculation, ignoring real conditions: ceiling height, window area, wall thickness, region, building orientation. Result — boiler can't cope or operates with excessive costs. Calculate BEFORE renovation starts — and you won't need rework.
More Accurate Than 100W/m²
Simplified formulas ignore real operating conditions. TermoFlo calculator computes heat losses accounting for wall construction, window count, ceiling height, region and other factors. Calculation accuracy — foundation of proper equipment choice.
Proper Boiler and Radiator Selection
Knowing exact heat losses, you easily select boiler of required capacity and radiator section count for each room. Calculator shows how much heat building loses, so you can compensate these losses with optimal equipment.
Contractor and Worker Verification
Don't trust equipment selection on word alone. Calculate independently or verify contractor calculations. Calculator allows understanding in minutes whether heating system capacity is correctly selected for your building.
Avoid Expensive Equipment Selection Mistakes
Properly selected boiler operates in optimal mode and consumes 20-30% less fuel compared to oversized one. You don't overpay for excess capacity at purchase and don't lose money on inefficient operation. One-time calculation saves budget for years.
From House Parameters to Boiler Selection in Three Steps
From input to professional output in three simple stages
Enter House Parameters
Specify area, ceiling height, window count and sizes, wall type. Select region to account for climate conditions. Calculator automatically fills typical temperature values.
Get Heat Losses Instantly
Calculator computes heat losses through walls, windows, ceiling, floor, accounts for ventilation and infiltration. Results show how much heat building loses on coldest days of year.
Select Equipment
Based on calculated heat losses you learn required boiler capacity and radiator section count to install in each room. Calculator accounts for 10-15% reserve to compensate peak loads.
Who is this calculator for?
Precision tools tailored for various engineering disciplines
Project Managers and Suppliers
THERMAL & SYSTEMSQuick heating system capacity calculation for commercial proposal. More accurate than simplified 100W/m² method — you offer customer optimal solution, not sell excess capacity.
HVAC Engineers
OPERATIONS & COSTSFast calculations for simple objects — private houses and apartments. Calculator allows preliminary calculation in minutes without complex software. For complex projects — foundation for further detailing.
House and Apartment Owners
HYDRAULICS & FLOWVerify contractor or calculate independently. Learn why radiators heat but don't warm — perhaps there's simply not enough of them. Calculate required radiator sections or boiler capacity to purchase.
Calculate Heat Losses Now — Select Equipment Correctly
Free online heat loss calculator. Instant results without registration. More accurate than simplified methods.