A bimetal radiator is chosen when extra pressure tolerance and durability are needed without going to heavy cast iron. It is a common option for systems with less predictable heat-carrier conditions.
When bimetal is better than aluminium
- There may be pressure fluctuations. Bimetal handles them better.
- The heat carrier is not ideal. The inner steel channel adds resilience.
- Long-term durability matters. Especially where system operation is not perfectly stable.
What installation includes
- Location and bracket setup. The wall must carry the wet weight safely.
- Valve set. Shut-offs, thermostatic valve if needed, air vent.
- Circuit connection. With the right diameter and flow/return orientation.
- Startup and leak check. Without this the installation is incomplete.
Where mistakes happen
- No output sizing. Strength does not replace correct heat calculation.
- Old valves are left in place. They become the next leak point.
- No balancing. One radiator overheats while another stays lukewarm.
Typical prices in Israel
- Installing one bimetal radiator — 590–950 ₪
- With new valves and thermostatic head — 800–1,250 ₪
- With altered tails — from 1,050 ₪
Frequently asked
Is bimetal always better than aluminium?
Not always. It is tougher and more tolerant of difficult conditions, but it costs more. In a clean autonomous system, a good aluminium unit is often fully sufficient.
Do I need a thermostatic head during installation?
If you want room-based temperature control and better efficiency, a thermostatic valve and head are strongly recommended.
Can I change only one radiator to bimetal?
Yes, if the system hydraulics allow it. But it is wise to check the balance and parameters of the remaining emitters.