Improved energy efficiency with surface heating and cooling Lars Nielsen Ilari Aho Uponor Group REHVA Supporters’ Seminar Amsterdam, May 14, 2009

30 April 2015©Uponor2 Presentation outline Uponor in brief The EPBD and its relation to Uponor solutions The Exergy concept and LowEx solutions Radiant heating & cooling solutions Case Study ZUB Summary and Conclusions

30 April 2015©Uponor3 Uponor key facts: Company Leading provider of plumbing & indoor climate systems in Europe and North America Market leader in infrastructure pipe systems in the Nordic countries Net sales for 2008: EUR 950 million Operations in 30 countries with 11 factories in 6 countries Personnel: ca 3,800 persons Listed in NASDAQ OMX Nordic in Helsinki

30 April 2015©Uponor4 Response measures to the EPBD recast EPBD Main Pillars: Energy performance requirements for new buildings Energy performance requirements for existing buildings that undergo major renovation Energy performance certificates Inspection of heating and air- conditioning systems Preference to: Decentralised energy supply systems based on renewable energy Cogeneration District or block heating or cooling Heat pumps Low Exergy System Design Radiant Heating & Cooling Solutions High energy efficiency improvement potential (5-50%) Low temp. heating & high temp. cooling optimal for heat pumps, district heating etc. Optimal utilisation of free and renewable energy sources Superior indoor comfort!

30 April 2015©Uponor5 The Exergy Concept Exergy is the ability of an energy flow to do work Exergy combines the quality and quantity of energy Exergy analysis is established practice in power plant optimisation, industrial ecology, etc First applications to the building sector in the 1990s Exergy in practice: ― Match the quality of supplied energy to the quality needs of the demand side ― Low temperature heating and high temperature cooling (Rehva guidebook no. 7) ― Optimal utilisation of low quality energy in district heating and district cooling systems

30 April 2015©Uponor6 Integrated water based systems ensure Exergy performance LowEx Supply structures District Heating, District Cooling High-performance buildings Hydronic Heating & Cooling system

30 April 2015©Uponor7 Uponor Indoor Climate Solutions Invisible Comfort Under floor heating and cooling systems Thermally Active Building Systems (TABS) Cooling panels and surface cooling elements Radiant heating and cooling controls Pre-insulated piping systems Ground energy collector systems Ventilation ducting

30 April 2015©Uponor8 Radiant cooling solutions Cooling panels Both new build and refurbishment Office, commercial and public buildings Thermally Active Building Systems Office, commercial and public buildings For new build only Floor cooling Office, commercial, public and residential buildings Mainly for new build Capillary mats Office, commercial, public and residential buildings Both new build and refurbishment

30 April 2015©Uponor9 Thermally Activated Building Structures stores and releases effect when needed

30 April 2015©Uponor10 Low temperature heating yields optimal performance of heat pump solutions The EPBD recast requires heat pumps to be considered for new buildings Radiant heating and cooling systems ensures optimal heat pump performance with supply temperatures close to ambient The Seasonal Performance Factor depends on the COP and the entire heating system A rule of thumb for heating is that 1°C higher supply flow temperature causes up to 2.5% higher energy consumption per yea 4,2 3,0 COP for Brine / water heat pump 6,8 kW

30 April 2015©Uponor11 Centre for Sustainable Building (ZUB), Kassel, Germany The construction of the ZUB office, research and exhibition building is an example of what today's state of the art of technology for low energy demand and sustainable building can look like. Planned as an example of a low energy building, the new office of about 1300 m² is attached to an existing preserved building and consists of three different main parts:one for exhibitions and events, one for offices, and an experimental part for different kinds of research in innovative building techniques and building services. A special focus was given to the realisation of a sustainable cooling concept, using a renewable energy source: the coolness of the ground underneath the building.

30 April 2015©Uponor12 The ZUB energy concept Minimised thermal losses during heating season and heat gains during cooling season ― Architectural design ― High insulation levels ― Solar gain control LowEx system solution ― °C supply temperature for heating ― °C supply temperature for cooling ― district heating return line utilisation and ground-coupled cooling

30 April 2015©Uponor13 Summary on Low Exergy systems LowEx concepts and integrated design provide ― indoor comfort and reliability for end- users ― energy and cost performance ― productivity: more from less Implementation requires ― a holistic and multidisciplinary approach through project planning, design, construction and commissioning ― new approaches, skills and an open mindset from HVAC design but it doesn’t require ― completely new technologies ― high upfront investments

30 April 2015©Uponor14 Conclusions Radiant heating & cooling solutions provides ― good potential for improving energy performance in response to the EPBD ― optimal operating conditions for renewable energy sources ― high comfort A total system approach is required ― for optimal performance of the building HVAC system ― interconnected water-based systems is a key element for overall performance Solutions for energy renovation are required ― cost efficient Low Exergy renovation solutions are required for the existing building mass ― radiant system can provide part of the response to increased future cooling loads