The Radel Delonghi radiators have integrated PHD technology, based on which the water flow is first distributed to the front surface of the radiator and then to the back surface. This asymmetric water circulation in the radiator has advantages that fully meet the requirements of thermal comfort, energy saving, and environmental respect. The heat is delivered only where it is useful, while at the same time unnecessary dispersion is minimized.

All Delonghi Radel radiators are tested at a pressure of 13 bar to ensure their proper operation at a pressure of 10 bar.

The Radel radiators are painted in 3 phases:

• 1) Hot degreasing phosphating with zinc-manganese material.
• 2) Pre-painting with electrostatic method in an oven at 180°C.
• 3) Final painting with epoxy powder (Epoxy resin, polyester varnish RAL 9010) in an oven at 160°C.

• Construction material: Special sheet metal with deep stamping with a thickness of 1.25mm
• Maximum operating temperature: 110°C
• Connections: 4 outlets ½” with internal threading for external loop bodies 

In the external loop heating panels, the switch is inserted with one side of the body and has an external tube that connects the top to the bottom of the radiator.

The type of columns is denoted by the number 11 (single column) which means it has 1 water column and 1 meander welded for increased heating surface.

The total thickness of the body is 6.3 cm.

It is very important to make the right choice of radiator depending on the dimensions of your space. The sizing of the radiators should be done by an engineer after studying the space and calculating losses. Incorrect selection of the radiator can lead to insufficient heating or excessive heating of the space, resulting in energy waste.

A practical and simple way to calculate the required calories yourself is to multiply the height, width, and length of your room in meters. Then, multiply the result by the number 50, which approximately represents the possible losses.

However, be careful, this calculation method is indicative and does not replace the study that an engineer will conduct, which will be absolutely accurate.