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Renewable Heat Law Baden-Württemberg
Federal State of Baden-Württemberg
 In November 2007 the parliament of the state of Baden-Württemberg approved its Erneuerbare-Wärme-Gesetz Baden-Württemberg (Renewable Heat Law Baden-Württemberg). Initially it effects only new residential buildings started after 1. April 2008, for which house builders are obliged to cover 20 % of the yearly heat demand with renewable heat sources. Beside the use of solar thermal, geothermal, biomass and ground coupled heat pumps the law also foresees alternative measures such as improved house insulation, cogenerators or the connection to district heating networks fed by RES or cogenerators. Starting from 1. January 2010 the law will also effect existing residential buildings.
The regulation of this law for new buildings was replaced by federal law EEWärmeG (see separate case study) on 1 January 2009.
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Building Code of Carugate (Province of Milano)
City of Carugate (Province of Milano)
 In 2003, the small (less than 15,000
inhabitants) Municipality of Carugate adopted a new building regulation which promotes energy efficiency in general.
In particular, following the model of Barcelona “Solar Ordinance”, the use of solar thermal systems to produce at least 50% of the domestic hot water demand was introduced as a mandatory measure for new buildings.
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Italian national law on energy efficiency in buildings
Italy
The Law no. 192 (August, 19th 2005), modified and integrated through Law no. 311 (December, 29th 2006), is the implementation, at national level for Italy, of the EC Directive 2002/91/CE, about energy efficiency in buildings.
This law foresees minimum requirements for energy efficieny and the use of renewables in new and refurbished buildings..
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Portuguese Regulation on Thermal Performance of Buildings (RCCTE)
Portugal
The RCCTE imposes the usage of solar thermal collectors for hot water production if there are favourable conditions for exposure (if the roof or cover runs between SE and SW without significant obstructions), in a basis of 1m2 per person (the total can be reduced up to 50%).
Other important requirements of the Portuguese STO defined within RCCTE are the following:
- For performance calculation of such systems, the product certification according to the European Standards is needed.
- This performance calculation is done using a programme developed by INETI, the SolTerm code.
- The installers of these systems must also be certified installers.
- The solar system must be guaranteed by a six year maintenance contract, covering the whole solar thermal system.
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Local Building Energy Standards in Ireland.
Some Counties of Ireland.
Starting at the end of 2005, a number of progressive local authorities introduced building energy standards as part of planning requirements in their jurisdiction. These building energy standards require a substantial increase in the energy performance of new buildings (between 40% and 60% reduction in energy usage) as well as a mandatory contribution of renewable energy to their thermal energy requirement.
What is more, a new regulation al national level has been introduced in 2008. This shows clearly that the local energy standards adopted by several counties were a positive experience.
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Código Técnico de la Edificación (Spain).
Spain
The existing building code (CTE) entered into force in 2006. Among the basic quality requirements for buildings, the CTE contains the DB-HE chapter which aims, among others, at the efficiency of thermal installations and the application of solar thermal systems for hot water preparation for domestic purposes and indoor swimming pools. It is applicable for all new buildings and integral renovation projects (>1000 m2) when the hot water demand is higher than 50 l/day at a reference temperature of 60 ºC.
It is stated that for all new buildings and renovations a minimum solar fraction from 30 to 70% is required (depending on climate zone, hot tap water demand and energy source for back-up heating). The values established by the CTE are minimum values to cover the basic demand.
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Decret d’Ecoeficiencia (Catalunya, Spain).
Region of Catalunya
The Decree aims at regulating the criteria for the sustainability of buildings in Catalonia, promote social consciousness in the way to conceive, design, build and use buildings in a sustainable way. Four action fields have been established within the decree: water, energy (including solar thermal), materials, construction methods and waste.
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Barcelona Solar Ordinance.
City of Barcelona.
 The Barcelona Solar Thermal Ordinance entered into force in August 2000. Its main promoter was the Sustainable City Council. The purpose of this ordinance is to regulate the incorporation of solar thermal energy and its use for the production of hot tap water in the city’s buildings. The Solar Ordinance affects new, restored and fully refurbished buildings and those seeking to implement a change of use. This regulation applies to buildings intended for residential, health-care, sports, commercial and industrial use and, generally, any activity involving the existence of kitchens, laundries or other circumstances that lead to a large consumption of hot water, regardless of whether they are public or privately owned.
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