Find the ideal Lojimax radiator or towel rail for any room in under 2 minutes.
Our free calculator uses your room’s dimensions, insulation and window type to estimate the BTU and Watt output you need and recommends the right Lojimax product type for it.
How It Works
- Tell us about your room
Room type, width, height, length and window area. - Answer a few quick questions
What’s above and below the room, wall construction, number of external walls, window glazing type, and your climate region (from the Aegean to Eastern Anatolia). - Get your result instantly
Your BTU and Watt requirement, plus a recommended product type (panel radiator, towel rail, or double-panel for higher demand).
- Free and instant
No account, no waiting, results in under 2 minutes - Built for Turkish climate zones
Separate calculations for warm (Aegean/Mediterranean), mild (Istanbul, inland İzmir), cold (Central Anatolia, Black Sea) and very cold (Eastern Anatolia, high altitude) regions - Accounts for real heat loss factors
Insulation, wall construction, window glazing and orientation, not just room size - Personalised product recommendation
Matched to a Lojimax radiator, towel rail, or double-panel range for higher-demand rooms - A starting point, not a final spec
For a precise, project-specific recommendation, our technical team is available directly from your result screen
What’s the difference between BTU and Watt?
Both measure heat output — BTU (British Thermal Units per hour) and Watts are simply different units for the same thing. 1 Watt is approximately 3.41 BTU/hr. Our calculator shows both so you can compare against any radiator’s spec sheet, regardless of which unit it’s listed in.
How is a room’s heat requirement calculated?
It starts with room volume (width × height × length), then adjusts for factors that increase or reduce heat loss: what’s above and below the room, wall construction and number of external walls, window type and area, and your climate region. A small, well-insulated interior room needs far less output than a large room with single-glazed windows and an uninsulated roof above it.
What size radiator do I need for my room?
It depends on your calculated Watt/BTU requirement and the specific radiator range’s output at that size — our calculator gives you the target output and a recommended product type; check the exact model’s technical specification against that figure, or contact our team for a project-specific match.
Does window type really make a difference?
Yes — significantly. Single-glazed windows lose far more heat than double-glazed ones, and metal window frames conduct heat away faster than wood or uPVC. This is one of the biggest factors in the calculation.
Is this calculator accurate for anywhere in Turkey?
The calculator adjusts for four broad Turkish climate zones (warm, mild, cold, very cold), so it gives a realistic estimate for most locations. Figures are averages — for an exact specification on a specific project, our technical team can advise directly.
Lojimax Products
Why Choose Lojimax
- 180+ RAL colours and finishes available, from matte and gloss to textured, brushed, anodised and chrome
- Vertical and horizontal orientations across most ranges
- Heat-pump compatible engineered to perform efficiently at 35–45°C flow temperatures, not just legacy 70–80°C systems
- 5-year manufacturing warranty on every range
- TSE and TÜV Austria ISO 9001:2015 certified production
OVER 180 RAL COLOURS & FINISHES
BUILT TO LAST, BACKED BY CERTIFICATION
Every Lojimax radiator, towel rail and sanitaryware product comes with a 5-year manufacturing warranty. Our production is certified to TSE (112848-TSE-01/07) and TÜV Austria ISO 9001:2015, with individual ranges tested to DIN EN 442-2 for heat output and pressure performance.
ENGINEERED FOR EVERY HEATING SYSTEM
Whether your project runs on a conventional gas boiler or a modern heat pump, Lojimax radiators are engineered to perform. Our ranges are designed to deliver efficient heat output even at the lower 35–45°C flow temperatures heat pumps use so you don’t need to oversize or replace radiators as heating systems change.
FIND THE RIGHT PRODUCT FOR YOUR PROJECT
Every space has its own heating needs. Use our heat requirement calculator to find the right model and output for your room, or get in touch with our technical team for a project-specific recommendation.
