No, you do not need radiators with underfloor heating. Underfloor heating systems are designed to provide efficient and even heat distribution throughout a room, eliminating the need for traditional radiators. This allows for more flexibility in room layout and design, as well as reducing dust and allergens that can be circulated by radiators. Underfloor heating is a popular choice for new construction and renovations due to its energy efficiency and comfort benefits. **

Replacing old ribbed radiators with flat panel radiators can be worth it in terms of energy efficiency. Flat panel radiators have a larger surface area, which allows for better heat distribution and can result in more efficient heating. This can potentially save energy and reduce heating costs in the long run. Additionally, flat panel radiators are often more aesthetically pleasing and can provide a more modern look to a room. However, the cost of replacing the radiators should be considered in relation to the potential energy savings. **

The efficiency of radiators in an apartment refers to how effectively they can heat the space while using the least amount of energy. This can be influenced by factors such as the size and design of the radiators, the insulation of the apartment, and the overall heating system. Efficient radiators will be able to distribute heat evenly throughout the apartment, maintain a comfortable temperature, and minimize energy waste. Regular maintenance and proper usage can also contribute to the overall efficiency of the radiators. **

The heating oil consumption for radiators depends on various factors such as the size of the radiator, the temperature setting, insulation of the building, and the outside temperature. On average, a typical household with radiators can consume around 500-1500 liters of heating oil per year. It is important to properly maintain and size the radiators to ensure efficient heating and minimize oil consumption. **

A condensing gas boiler with a high efficiency rating would be suitable for heating both underfloor heating and radiators. This type of boiler is designed to maximize the heat from the fuel it burns, making it more efficient and cost-effective. It can provide the high temperatures needed for radiators as well as the lower temperatures required for underfloor heating systems. Additionally, a modulating gas boiler would be ideal as it can adjust its output to meet the varying demands of both underfloor heating and radiators, providing consistent and comfortable heat throughout the home. **

The choice between cast iron radiators and convector radiators depends on individual preferences and needs. Cast iron radiators are known for their classic look, durability, and ability to retain heat for longer periods, making them more energy-efficient. On the other hand, convector radiators are more modern in design, heat up quickly, and are often more cost-effective to install. Ultimately, the decision between the two types of radiators will depend on factors such as budget, aesthetic preferences, and heating requirements. **

To implement underfloor heating using wall radiators, one can install a hydronic heating system. This involves running pipes filled with hot water beneath the floor for underfloor heating and connecting them to wall-mounted radiators for additional heat distribution. The system can be controlled by a thermostat to regulate the temperature and ensure even heating throughout the space. Proper insulation and professional installation are essential for efficient operation and optimal performance. **

The heating technician says that the radiators are not heating up properly because there is air trapped inside them. He explains that the air prevents the hot water from circulating effectively, which is why the radiators feel cold. He recommends bleeding the radiators to release the trapped air and allow the hot water to flow freely, which should improve their performance. **