Contractor

Name : Mitros

Contact : Job van Buchem

 https://www.mitros.nl

Construction Manager

Name : Nieuw Utrechts Peil

Contact : Sandra Winkel

 https://www.nieuwutrechtspeil.nl

Stakeholders

Function : Contractor

Vios Bouw

Sandra Winkel

 http://www.vios-bouw.nl/

Function : Designer

ONB

Lars Zwart

 https://www.onb.nl/

Function : Thermal consultancy agency

Nieman Raadgevende Ingenieurs

John Bouwman

 https://www.nieman.nl/

Contracting method

Other methods

If you had to do it again?

What would I do different the next time? Because we worked on this project for several years, step by step we had the opportunity to make it better step by step. These were relative small changes, I described the placing in an more invisible way of the solar panels above.
A question that I asked before we were obliged by the municipality to stick to the original architecture was: can we be more free in the renovation of the façade? We have so many the same buildings of this type in Holland. Can we allow ourselves a renovation with a totally new façade? Hopefully we will get the change someday.
Ir. Lars Zwart, ONB architecten, Utrecht

Building users opinion

During the first year of occupation, an independent party followed the residents and measured their satisfaction with their new home. Satisfaction with the climate system was also examined. The residents give an overall rating of 8 out of 10.

Energy consumption

• Primary energy need : 1,00 kWhpe/m².year
• Primary energy need for standard building : 150,00 kWhpe/m².year

Calculation method : Other

Breakdown for energy consumption : heating: 10,9 kWh/m2
hot water: 14,2
cooling: 0
ventilation: included with heating
household: 24,8 kWh/m2

• Initial consumption : 225,00 kWhpe/m².year

More information

Total energy demand is generated by solar pv-panels; total energy consumption equals the total energy output of the panels

Real final energy consumption

Final Energy : 50,00 kWhfe/m².year

Systems

Heating system :
• Heat pump
• Water radiator
Hot water system :
• Heat pump
Cooling system :
• No cooling system
Ventilation system :
• Double flow heat exchanger
Renewable systems :
• Solar photovoltaic
• Heat pump
• Renewable energy production : 100,00 %

Smart Building

Users’ opinion on the Smart Building functions : Tennants were not directly involved in the design phase. A representation of tennants was participating in the clients team and advised the client during the selection and clarifaction of the design.
Tennants review their apartments with an 8 out of 10.

Urban environment

The project is a retrofit of existing apartmentbuildings to nett zero energy apartments. The building is located in Overvecht in Utrecht. Next to the 48 apartments we describe in this contest, another 80 apartments adjacent to this building have been refurbished with the same nett zero energy concept. 

At the same plot we have also renovated 120 apartments to energylabel A++ using the same principles of the concept, but with a lower energy performance. These apartments are heated by natural gas boilers. In the future these boilers can be exchanged by heatpumps.
Apart from the energetic and architectural renovation we also attributed to the quality of the social environment. Most of the housing of the sixties have garages and storages placed on ground level. This causes unsafe and unattractive surroundings. In three blocks we succeeded to create extra houses with frontdoors on the street on the ground floor. The next step is the renovation of the gardens, pavements etc.

Together with the municipality we strive to remake this neighbourhood as an example for a social and sustainable future.

Product

Energy Module Factory Zero

FactoryZero

S. Klein Velderman

 https://factoryzero.nl/


Product category : HVAC, électricité / heating, hot water

Factory Zero delivers a completely integrated system for heating, domestic hot water supply, double flow ventilation and monitoring.

Factory zero delivered a total concept and had experience in other zero energy projects. They were able to make a tailor made solution that fitted exactly on the (former) balcony.

Construction and exploitation costs

• Total cost of the building : 4 300 000 €

Indoor Air quality

A double flow ventilation system with heat recovery is part of the nett zero energy concept. The ventilationsystem is controled through CO2 sensoring. The installation increases and decreases ventilation flows as a respond to the CO2 concetration. This gives a guarantee on good indoor air quality as well on reducing energy consumption by ventilation as much as possible.