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--- planning:refurbishment_with_passive_house_components:practical_implementations_of_step_by_step_retrofit_to_enerphit_standard [2016/03/10 17:42] – kdreimane
+++ planning:refurbishment_with_passive_house_components:practical_implementations_of_step_by_step_retrofit_to_enerphit_standard [2016/03/10 17:43] – [Practical implementations of step by-step-retrofit to EnerPHit standard] kdreimane
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 Another option would be to reuse the existing extract system, insert an air/water heat pump on the exhaust air to generate heating and domestic hot water. This option is less efficient than a ventilation system with an air/air heat exchanger, but it is potentially cheaper. Dynamic simulations have been conducted by Gustafsson and Dermentzis [2014] on a similar system in a single family house retrofitted to EnerPHit standard. The final energy consumption of this heat pump providing heating only, was found to be around 13kWh/(m².a) for a similar climate (London). This type of heat pump, also providing domestic hot water with a solar thermal basis could be considered in this building case study.
-[{{ :picopen:refurbishment_plan.jpg?600|Figure 4: Visual summary of an EnerPHit refurbishment plan (case study Courcelles, France)}}]
+[{{ :picopen:refurbishment_plan.jpg?500|Figure 4: Visual summary of an EnerPHit refurbishment plan (case study Courcelles, France)}}]
 **4. Management of a step-by-step retrofit**
 \\ Keys for success in a step-by-step approach consist of: organising an overall refurbishment plan with the owner, defining acceptable intermediate states, and proving cost-efficiency.
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 **4.2 Acceptable intermediate states.**
-\\ Designers and owners are not used to retrofitting a component and anticipating the future upgrade of their neighbour. Intermediate states have to be clearly described in tender documents and clearly identified on designer sketches (Figure 5, Right).[{{ :picopen:global_cost_enerphit.png?600|Figure 5: Left:  Global cost of EnerPHit step-by-step retrofit compared to standard efficiency maintenance (Auby, France). Right: Window installation and external insulation, showing both intermediate state and final state (Courcelles, France)}}]
+\\ Designers and owners are not used to retrofitting a component and anticipating the future upgrade of their neighbour. Intermediate states have to be clearly described in tender documents and clearly identified on designer sketches (Figure 5, Right).[{{ :picopen:global_cost_enerphit.png?500|Figure 5: Left:  Global cost of EnerPHit step-by-step retrofit compared to standard efficiency maintenance (Auby, France). Right: Window installation and external insulation, showing both intermediate state and final state (Courcelles, France)}}]
 **4.3 Prove cost-efficiency.**
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 The EuroPHit project is co-funded by the European Commission under the grant agreement IEE/12/070/SI2.645928.
 \\
+\\
 **5. References**
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 | [Sevela, Pfluger 2014] | Energy refurbishment of heritage buildings with PHPP’s and real measurements’ feedback, 18th International Passive House Conference, Aachen, 2014 |
 | [Schulz 2008] |Verglaste Balkone – eine Option für die Altbaumodernisierung?, Protokollband Nr. 37. Passivhaus Institut, Darmstadt, 2008 |