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Uponor Solutions for modernization projects

Uponor Solutions for modernization projects

Radiant heating for floors, ceilings, or walls

Climate protection targets and the associated new legislation are also bringing energy-efficient radiant heating systems into focus in modernization projects.

The following shows why underfloor, ceiling, and wall heating systems are increasingly in demand and what options they offer.
 
The crisis in new construction is causing the construction industry to focus more on existing buildings. This is because it offers great potential: 85 % of buildings in the European Union were built in 2000 or earlier and 75 % have a poor energy balance 1. When it comes to reducing emissions in the building sector, energy-efficient refurbishment of existing buildings is absolutely essential. After all, existing buildings account for around 75% of greenhouse gas emissions and energy consumption during their useful life, the operation and maintenance phase, while new buildings only account for 25% of gray energy and energy consumption 2.
 

Changes to the EU directive on the energy performance of buildings

The EU's revised Energy Performance of Buildings Directive makes a major contribution to the European Union's goal of achieving climate neutrality by 2050. The measures include 3:
 
  • national trajectories to reduce the average primary energy use of residential buildings
  • enhanced long-term renovation strategies, to be renamed national Building Renovation Plans
  • a gradual phase-out of stand-alone boilers powered by fossil fuels, starting with the end of subsidies to such boilers from 1 January 2025
  • one-stop-shops for the energy renovations of buildings for home-owners, small and medium-sized enterprises and other stakeholders
  • the modernisation of buildings and their systems and better energy system integration (for heating, cooling, ventilation, charging of electric vehicles and renewable energy)
 
Based on these measures, the countries of the European Union have developed and adopted or are currently revising their individual legislation. The impact on the renovation market in the respective countries is massive. Buildings with the demonstrably worst energy balances are particularly affected. 

Refurbishment not only offers building owners financial advantages, it is also more sustainable than a new build because the “gray energy balance” 4 is better. Refurbishment is often carried out to reduce the heating or cooling load. In addition to insulation and shading, the heating system installed plays a key role. According to an analysis by the Joint Research Centre (JRC), the European Commission's Science and Knowledge Service, “heat pumps play a central role in the transition to a climate-neutral society and are also seen as a key instrument for achieving independence from foreign sources of oil and gas.“ 5


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EU heat pump initiative and actual systems in the markets

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Author: Sven Petersen

Sven Petersen has been working as a consultant for Uponor for more than 24 years. He specialises in panel heating and cooling systems in new buildings and renovations. He is also an expert in special applications in the field of panel heating systems. His speciality in these areas is control technology. His repertoire also includes presentations on the Uponor drinking water concept and local heating supply.

Radiant heating renovation systems from Uponor

Dry installation – Uponor Siccus Mini

Height of only 15 mm with parquet

  • Using the PE-XA 9.9x1.1 mm pipe and a particularly hard XPS 400 radiant
  • Optimum heat distribution by the laminated aluminum foil
  • Circuit length is limited to 70 m

Ways of installation based on the top floor covering
  1. Floating parquet - Uponor Siccus Mini installed on the existing screed - system height is only 15 mm
  2. Tiles - additional 6 mm thick tile carrier is required–the system height is therefore 21 mm
  3. Carpet - Siccus Mini can be laid on a level bare concrete or wooden floor using a drywall board system height is then 33 mm
Benefits
  • For modernization projects
  • Easy to install
  • Low height dependant on floor covering
 
 

Dry installation - Uponor Siccus

Quick and easy to install

  • System is laid on the existing unfinished floor
  • Pipes are installed in heat conducting lamellas, which are inserted into a profiled PS radiant
  • Drywall boards with a minimum thickness of 18 mm (Knauf Brio 18) are used as a load distribution layer
  • Installation on existing wooden beam ceilings

Benefits:
  • Low surface load
  • Rapid construction progress

Downside:
  • Little scope in terms of sound insulation
  • System must be operated with slightly higher flow temperatures, due to the lower conductivity of the drywall boards

Wet installation – Uponor Minitec

Fast installation and utilization 

  • On-site insulation, directly on an existing screed or top floor covering
  • Consists of a 12 mm high dimpled foil into which a PE-Xa pipe measuring 9.9x1.1 is inserted
  • Maximum heating circuit length of around 70 m 

Benefits:
  • Low installation height
  • Installed on the unfinished floor, Minitec achieves an installation height of only 49 mm on a shear layer in combination with Knauf mineral wool insulation TP-GP 12-1 and Knauf Levelling compound N440
  • Impact sound improvement value of 28 dB
  • Installed on existing screed, Minitec with Knauf N430 leveling compound and vinyl design flooring requires an installation height of 18 mm

Wet installation - Uponor Klett Twinboard

Quiet and easy to install

  • Laid on the existing unfinished floor
  • 3 mm thick double-webbed radiant on which PE-Xa or metal composite pipes measuring 14 or 16 mm are laid using the Klett principle

Benefits
  • Underlying impact sound insulation comparable to new buildings
  • Heating circuit lengths similar to those for new-build systems

Downside
  • Longer screed drying times
  • Longer functional heating

A question of setting: control and hydronic balancing

The control system is an important component of a heating system. It ensures comfort and has a major influence on the efficiency of the system–in short, it ensures the intelligence of the system. The system is optimally adjusted when it is hydraulically balanced. In residential buildings with existing oil and gas boilers, the distribution systems generally have a maximum flow temperature of 55°C to 90°C. However, for a conventional heat pump to work efficiently, the flow temperatures must be lowered to a certain low temperature threshold 7. In order to reduce radiator temperatures, one or a combination of the following measures must be taken in many buildings: Improving the thermal insulation of the building envelope, retrofitting radiators or individual units with larger radiators and carrying out hydronic balancing of the heating system to ensure optimum heat distribution between the heating components.

7 The specific low temperature threshold varies depending on the climate region. According to one study, it is estimated that the maximum flow temperature in Germany should not exceed 55 °C.

Smatrix pulse autobalancing

Autobalancing technology and analysis features

With conventional hydronic balancing, experts calculate the heating load of each room–for the design case–and design the heating surface and mass flow accordingly. They determine the pipe pressure loss and the balancing pressure loss and thus obtain the fixed setting values for the heating system. Because there are usually deviations between the theoretical assumptions and actual practice, the calculated set values do not correspond exactly to the real heating conditions. As a result, the control system does not deliver the optimum water volumes required for a room. This applies in particular to modernization projects, where often not all the data for an exact calculation of the heating load is available.

This can be avoided with autobalancing.

It is based exclusively on the actual heating conditions: The measured room temperature is the decisive factor. Controls with an autobalancing function calculate the timing of the actuators on this basis (pulse width modulation method). This allows the control system to react cyclically to changes and permanently ensure the desired room temperature. This guarantees long-term comfort and efficient operation of the system.

Uponor control systems to replace an existing control system

Uponor Smatrix Wave Pulse - wireless

  • No cables are needed
  • At home or away with Uponor Smatrix Pulse App or voice assistant
  • Interactive installation wizard in the App
  • Adapting to your daily routine
  • Rely on security settings and full data control
  • Autobalancing technology and analysis features

Uponor Base 230 V - wired

  • Base controller X-60 - for heating only (supports up to six room sensors and up to 2x6 actuators)
  • Base controller X-80 - for heating and cooling (supports up to ten room sensors and up to 12 actuators)
  • Compatible with 230V room sensors also from other manufacturers
  • Only three-core cable required to connect the room thermostats
  • Autobalancing technology

Uponor Siccus Mini

The Uponor Siccus Mini underfloor radiant heating system from GF Building Flow Solutions is dry installation solution, that features a very low construction-height, and a fast installation time.

Uponor Combi Port and Aqua Port for decentralized hot water supply

100 % drinking water quality, 40 % energy savings and 30 % faster installation: Uponor Combi Port and Aqua Port heat interface units for decentralized hot water supply and–depending on the model–for heating and cooling.

Hygienic hot water supply

  • Comparison of decentralized and centralized concepts
  • Decentralized systems offer clear advantages for drinking water hygiene and energy consumption
  • With decentralized systems, project participants benefit from lower investment costs, planning reliability and shorter installation times

Uponor produces world’s first circular PEX pipe based on 100% chemically recycled raw material

Uponor, Wastewise, Neste and Borealis have successfully produced pipes made of cross-linked polyethylene (PEX) which was based on feedstock gained from chemically recycled post-industrial waste plastic from PEX pipe production, using an ISCC PLUS certified mass-balancing approach. The partner companies believe this project is among the first implementations of chemical recycling of PEX.