Glossary – Milling technology

Aluminium composite pipes – High-quality, durable heating pipes with aluminium core; ensure even heat distribution.

Carbon neutrality – All Naef GROUP renovation work is climate-neutral. This has been the case since 2015.

Cement floor – Required substrate type for milling the grooves using the milling technology.

Combination with heat pump – Ideal for low-temperature systems, as the flow temperature is only approx. 30–33 °C.

Comfort heat – Uniform radiant heat without draughts or cold zones.

Commissioning – Once the underfloor heating has been installed, it is ready for operation. All that remains is to agree with the floor installer when it can be put into operation.

Costs – The costs can be calculated either via our quote calculator or via the responsible consultant.

Customer satisfaction – Our customer satisfaction is very high, which is clearly reflected in our Google reviews and our numerous references.

Customers – We do everything we can to ensure that they are not just satisfied, but delighted. Everything we do is dedicated to serving our clients.

Drying time – The levelling compound is completely dry within 4–6 hours and ready for laying again.

Dust – Because we use wet milling, virtually no dust is generated.

Dust-free – Key feature of milling technology; enables clean work in occupied rooms.

Energy savings – Underfloor heating systems reduce heating costs by up to 25% compared to old radiators.

Filler – After laying and pressing down the pipes, we fill the space around them with a stable, cement-based filler.

Floor covering – All common floor coverings are suitable for installation over a milled-in floor heating system.

Flow arm temperature – As the pipes are closer together and run closer to the surface, the flow temperature can be kept significantly lower. This equates to about 30–33 °C in the flow arm.

Flow regulation – Fine adjustment is made directly at the manifold. The required flow rate is regulated there and can be read precisely via the display on the manifold.

For properties with special conditions, the duration may vary accordingly.

Health & hygiene – Underfloor heating is significantly better than radiators. Underfloor heating reduces dust circulation and mould formation – ideal for allergy sufferers.

Heat distribution – Even heating of the floor and the entire room.

Heating circuit manifold – Connection point where all heating circuits converge and are controlled.

Heating costs – Retrofitting can reduce heating costs.

Heating pipes – The 16x2 aluminium multilayer composite pipes are laid.

Installation height – Milling technology has no installation height, which means that the room height remains the same after the underfloor heating has been installed.

Installation height – Total height of the floor covering or potential loss of room height if additional flooring has to be poured. This is not necessary with the milling technology.

Interior design freedom – Eliminating radiators creates more space and design freedom.

Leak test – After installation and connection, the pipes are pressurised with water or air and tested for leaks.

Low-temperature system – Heating system with low energy requirements; ideal with milling technology.

Manifold connection – Connection point of the milled-in heating circuits to the existing heating system.

Milling depth – The grooves are milled to a depth of around 22 mm in order to install the 16x2 aluminium multilayer composite pipe.

Milling distances – The grooves are milled at a distance of 10–15 cm apart, depending on the area concerned.

Milling machine – Special device that precisely mills grooves into the subfloor and extracts dust and mud.

Milling technology – Process in which grooves are milled directly into the existing subfloor in order to insert heating pipes.

Multilayer composite pipes – 16x2 mm heating pipes with an aluminium core ensure even heat distribution and are the current standard for new buildings.

Naef GROUP – Provider of milling technology, specialising in energy-efficient building renovations.

Older buildings – Milling technology works well in older buildings and is the ideal way to retrofit underfloor heating quickly and easily.

Pipe length – The underfloor heating should not be laid longer than 100 m per heating circuit. We make sure to choose slightly shorter lengths to ensure optimum adjustment and function.

Porous floor – If the screed/subfloor is too porous, milling is not recommended as the material may break out or be damaged. This must therefore be checked in advance to ensure that the substrate is sufficiently robust.

Power connection – Our machine requires at least a 16-amp CEE plug.

Radiant heat – Type of heat that is perceived as particularly pleasant and distributes heat evenly. Having warm feet is considered more pleasant than simply having warmth in the room that does not come from below.

Renovation duration – How long the milling takes depends on the number of heating circuits and the area in the property. A detached house with approx. 120–130 m2 usually takes about 3 working days.

Retrofitting – Installation of underfloor heating in existing buildings without new construction.

Retrofitting – Replacing an old heating system with modern underfloor heating.

Room aesthetics – Improved appearance by eliminating visible radiators.

Room height – The room height remains the same as we mill the grooves into the floor.

Screed – The screed or subfloor must have a minimum thickness of around 5 cm. The term screed is often used in Germany. In Switzerland, the term subfloor is used.

Sludge extraction – The milling technology works with water cooling and extraction, preventing dust formation.

Subfloor (screed) – Layer between the load-bearing structure (concrete ceiling) and the floor covering (parquet, tiles, etc.) into which the heating pipes are milled.

System requirements – Cementitious subfloor with a minimum thickness of 5 cm.

Temperature control – Precise control of the room temperature through even heat output.

Underfloor heating – Heating system under the floor covering that provides pleasant and even radiant heat.

Water connection – Must be prepared on site for the construction phase.

Werner Näf – Founder of the Naef GROUP, pioneer of modern building technology systems.