There is no doubt that Smart Heat company is the best central heating company in Egypt, It is a leading company with a distinguished history in both types of central heating, whether wall heating or underfloor heating in addition to DHW producing system by water boilers and pool heating systems. There are two types of central heating, which its importance is:- Central heating helps increase the space temperature between 22 to 24 oC, which helps to feel warm in the winter season, no matter how cold the outside air is. Central heating is divided into two types: 1. Wall heating:-  Components and instrument used:- • Central heating heater (Wall-mounted gas boiler) • Polyethylene pipes • Radiators (aluminum or steel) • bathroom radiators (Towel Radiators - ventilated plate) Central heating heater (IMMERGAS-ITALY):- It is a leading product in Italy since 1964 and featured with:- • New design with digital screen. • New hydraulic set. • Adjustable side scrolling. • Electronic adjustment panel driven by microprocessors. • Digital Zone Control Panel. • Different power output (24kW – 28kW – 32kW). Polyethylene pipes (Giacomini):- • Multi-layer tubes (R999) consist of an inner PEX-b layer (polyethylene mesh), an aluminum middle layer welded lengthwise (header tip) with laser/TIG technology, and a white PEX-b outer layer. • The adhesive middle layers join to the aluminum and PEX-b layers uniformly. • The aluminum layer provides a secure barrier against oxygen and other gases along with outstanding resistance to cracking. • Multilayer pipe (R999) is suitable for domestic water, heating and cooling systems according to EN 21003 Aluminum Radiator (Sira):- • These aluminum foil radiators are able to heat many areas. The radiator consists of aluminum of 8 cm wide strips. The number of radiator segments is calculated based on the areas required to be heated and the required thermal loads. • These radiators come in white as a basic colour, but they can also be painted in other colours that match the colours of the house. • These radiators can be used with central heating systems, where they are connected to the hot water network and the central heater and can be used separately and operate with electricity. Steel Radiator:- • One of the world's most famous radiators, because it is characterized by long temperature retention. It is also characterized by a high capacity of hardness and endurance, as well as reasonable prices compared to other systems, and sizes that fit all different spaces. Bathroom Radiator:- • This radiator is used to heat bathrooms with areas ranging from 3 m2 to 9 m2 and can dry the clothes placed on them as well. • These radiators come in white as a basic colour, but it can also be painted in other colours that match the colours of the bathroom such as chromium and silver colours. • These radiators can also be used in central heating systems, where they are connected to the hot water network, and the central heater and can be used separately and operate with electricity. How central heating works:- The central heating system depends on heating the water and pumping it into the polyethylene pipe network through the manifold to the heaters that heat the space by distributing heat uniformly and safely and save electricity because they run on natural gas. This is this and Italian-made system works in a closed circuit. The harmonious and innovative aluminum radiators from Sira Group are designed to combine aesthetics, outstanding performance, energy savings, and a beautifully streamlined design without any sharp edges, which makes it suitable for any type of residential and commercial installation. 2. Under Floor Heating The underfloor heating is the latest heating method for your apartment, villa, administrative or commercial premises. Components and instrument used:- • Central heating heater: • Polyethylene pipes: • manifold panel: How underfloor heating works:- Insulating foam is placed to prevent heat dissipation downward and make sure that all the heat generated from the tubes goes directly to the ground and then Pex-Al-Pex tubes are placed on top of it, It is multiple layers of polyethylene pipes designed for central heating and can operate under pressure up to 10 bar and temperature up to 95 oC, then a wire mesh is placed over it responsible for distributing heat and increasing the heat transfer area. These are the primary components of underfloor heating. A water boiler, of course is also used to heat the water with gas and the water loses the heat in the pipes and heats the place. The underfloor heating preserves the beauty of the space, as none of its components appear. The operation of the underfloor heating system is economical and requires virtually no maintenance, in which, warm water is distributed through the central heating heater to the heating pipes extending under the floors, whether the floors are ceramic, porcelain, parquet or marble. The heat is distributed in the floor in a smooth manner, which helps to heat the entire place uniformly. There are certain requirements in both systems • Power supply cable 2×2 mm 220 volts • Thermostat cable in rooms and bathrooms to the panel 4×1 mm • Magic box (7×9) inside the wall for each thermostat.