Green Code Climatic Slab®

We do not heat the air, but rather the objects: the floor, the walls, the furniture — everything located within the rooms. To achieve this, we install pipes in the ceiling and gently warm them to surface temperatures of approximately 26 °C. The energy is then emitted into the room as radiant heat. Wherever the heat waves strike objects, they warm them up. The air that comes into contact with the Green Code slab is also heated, but it does not need to rise — it is already at the top and forms a thin layer of warm air beneath the slab. The heat is not dissipated, and the air does not begin to circulate. Consequently, the thermal energy must be emitted into the room as radiant heat. All objects in the room — floor, walls, sofa, table, even the window glass — absorb the thermal energy. As a result, all bodies are warmer than the air. The air warms up from the objects, not the other way around. The floor, the sofa, the chair, etc., are warm. This is why the measured air temperature with radiant heating can be about 3 °C lower than with convection heating — the thermometer reads 20 °C but feels like 23 °C. This enhances comfort and also saves approximately 18 % in energy.

Conventional radiators emit only a small portion of their heat as radiant energy due to their design. Most of the heat is transferred to the surrounding air; the warm air then rises toward the ceiling while cooler air flows in to replace it. This causes the air throughout the entire room to circulate, and objects within the room — such as the floor, walls, sofa, table, etc. — are heated only by the passing air and thus remain colder than the air itself. The resulting vertical temperature gradients within the room can be significant and are often perceived as uncomfortable.
Furthermore, the air circulation stirs up household dust, which can adversely affect health. As the deposited dust is lifted by the moving air, it becomes dispersed and suspended throughout the entire room. Household dust — an unappealing mixture of skin flakes, mites, mite excrement, mold spores, fibers, hairs, soot, pollen, chemical substances, plasticizers, etc. — tends to stick dryly in the nose and can trigger serious health problems not only for allergy sufferers.

The Principle of Radiant Heat

• Radiant heat behaves like light in that it consists of energetic waves, which are also referred to as infrared light or thermal waves.
• Just as the frequencies of visible light are perceived by the eyes, radiant heat is sensed by the heat receptors in the skin.
• Radiant energy is emitted by all solid bodies and absorbed by all solid bodies. Through thermal waves, heat is transferred directly from one object to another, resulting in a balance: cooler objects absorb more energy than they emit and thus warm up, while warmer objects emit more energy than they absorb and therefore cool down.
• We experience intense radiant heat when we turn our face toward the sun or approach a large campfire.
• Humans themselves emit infrared radiation through their skin, with a wavelength of approximately 2.3 µm.

In the warmer months, the Green Code building system simply operates in reverse. The principle of radiant heat is still used: we circulate cold water through the pipes embedded in the slab. Heat emitted by the walls, floors, furniture, and people — as well as rising warm air — warms the slab. The circulating water inside the pipes absorbs this heat energy, warms up, and carries the heat away, while cold water continuously flows in. In this way, the entire room is cooled. All objects within the room transfer their energy to the ceiling, become cooler, and can subsequently absorb more radiant heat from people. As a result, the surrounding environment cools down noticeably: we sweat less because excess body heat is dissipated more through radiation and less through evaporation. The perceived room temperature is approximately 2–3 °C lower than the measured air temperature — creating an ideal indoor comfort climate.

In buildings with a high insulation standard, cooling will soon become more important than heating. Not only in offices but also in residential buildings, significant heat is generated through solar radiation, lighting, electrical appliances, computers, and people, which can quickly raise indoor temperatures to uncomfortable levels. Green Code provides a solution in a single system suitable for all seasons: the effective insulation of the Thermo Wall not only keeps the cold out in winter but also prevents excessive heat ingress during summer. This ensures a comfortably tempered living and working environment with comparatively low energy consumption.

The best environmental performance is achieved when the energy comes from one’s own roof. Those who consistently pursue sustainability can utilize the waste heat via a heat pump for domestic hot water generation — an intelligent way to passively harness solar energy.

Climatic Slab in heating setting

• Warm - without overheated air
• short reaction times through superficial installation of the registers
• each room, even down to individual zones, can be controlled separately
• cost saving during heating , because the "feel good" room temperature is approx. 3 °C lower (approx. 6 % heating energy saving per 1 °C)
• low flow temperatures, because in the ceiling 100% active surface - no piece of furniture or floor covering obstructs (covers) the heating surface
• particularly suitable for regenerative energy generation such as heat pumps and solar thermal energy, as only low flow temperatures are required
• particularly comfortable feeling of warmth through even heating of all objects via radiation heating
• no dust whirling up, because only low convection
• no air layering, but uniform heat throughout the rooms
• higher humidity = health protection (mucous membranes are kept moisturized)
• Can be combined with acoustic slab

Climatic Slab in cooling setting

• Cool - but no chilly air
• short reaction times through surface installation of the registers
• each room, even individual zones, separately controllable
• Energy savings, as the "feel good" room temperature is approx. 2-3 °C higher (e.g. at 26 °C instead of 24 °C): less cooling required
• higher flow temperatures, as 100% active surface in the ceiling - no furniture or floor covering obstructs (covers) the cooling surface
• very high cooling capacity through combination of Green Code ceiling and wall system
• Waste heat can be reused
• Can be combined with acoustic ceiling

Climatic Slab in heating setting

• Heat output* 82.34 W/m² based on DIN EN 1264-2 | ∆t 15K; Higher outputs (even above 120 W/m²) are possible depending on the design, material selection, tube spacing, system temperature and the ∆t to the (also operative) room temperature.
• Active area share: up to 100%
• Response time from approx. 15 minutes

Note: When designing ceiling heating systems, the instructions from DIN EN 1264-3 and ISO 7730 must be observed. We are happy to assist with the calculations.

Climatic Slab in cooling setting

• Cooling capacity* 74.10 W/m² based on DIN EN 1264-2 | ∆t 10K. Higher capacities (up to more than 90 W/m²) are possible at any time depending on the design, material selection, tube spacing, system temperature and the ∆t to the (also operative) room temperature or/and in case of asymmetric loads (e.g. glass facades).
• Active area share: up to 100%
• Response time from approx. 15 minutes

Note: When designing ceiling cooling systems, the information from DIN EN 1264-3 and ISO 7730 must be observed. The respective additional heat transfer resistances are known from Part 5 of DIN EN 1264. We will be happy to assist with the calculations.

The use of precast concrete ceilings is not always possible or practical. That is why we offer a drywall solution that allows you to complement the Climatic Slab in challenging areas or in a suspended version. For example, this can be applied in attic conversions or when you plan a centralized distribution of all building services through the corridor slab in large floor areas. This has the additional advantage of maintaining access to ventilation and heating systems.
The heating and cooling registers are located close to the concrete surface, resulting in short response times. The slab utilizes 100 % of its surface area for heating and cooling. Through separate circuits, each room can be individually controlled, and large areas can be divided into zones.