VERDI - OpenSource 11kWh/m2 Modular envelope NeZeR

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Contract N°: IEE/13/763/ SI2.674877March 2014 - February 2017

NeZeR Design CompetitionROMANIA

[Andrei Toma + TEKPOD SRL, Technical University Gh. Asachi, Iasi]

Sustainable Built Environment conference –SBE 16Tallinn/Helsinki, 5-7 October 2016

What challenge?

• Tower flats, Basement, 4 floors, terrace• 1968, Never refurbished• Self owned, between 20 landlords• Central heating: self owned• Energy consumption, space heating

212.9 kWh/sqm• Energy consumption, domestic hot

water 66.33 kWh/sqm• Energy consumption, other 10.99

kWh/sqm

What challenge?

• To gain energy efficiency performance through embeded renewable energy soruces

• To refurbish the central heating distribution system on a horizontal level

• To reduce the primary heating energy consuption to less than 90 kWh/sqm

• The building is a standard cube with inset balconies

• The building is in climate zone II• Constant shaddows in lower floors

Renovation concept

• Walls 300mm insulation U-Value: 0.094W/m2K, roof 460mm U-Value 0.095W/m2K, ground floor 520mm U-Value 0.131W/m2k

• HVAC : 2x Venco VRH• Solar PV + Solar Thermic panels installed on 284m2 output of 57.6 kWh/m2

Proposed technical solutionsOriginal building After NZEBR

WallsU=1.66 W/m2K U=0.094 W/m2K

Basement U=2.5 W/m2K U=0.131 W/m2K

RoofU=0.877 U=0.095 W/m2K

Windows Unknown U=0.80 W/m2K

HVAC290.22 kWh/m2 82.5 kWh/m2

RESNone 57.6 kWh/m2

Environmental aspects – Materials selected

•Glulam

•Mineral wool

•BASF NEOPOR

User aspects• Space extension: balcony, bigger

living room, lift• Self controlled HVAC, based on user

behaviour through smart appliances• Failsafe systems to ensure security of

thermal appliances for overheating and underheating

• 3 Months renovation process with little disruption over residents

• Residents to be informed through a portal with the current stages of design, being updated daily which include expenditure, current status on a timeline and next in line for processes.

Market appeal

• The building stock of Romania, with a similar shape is around 157,000

• Technologies used are produced in a mass market environment• A prefab solution, to ease installation and disruption• Risk Free• B2B prefab model receivesdiscounts on bulk sales• Investment of €542,953 • 30 years Life cycle cost €810,740• Investment €50 / person / month• Sustainable derivatives options for investors

Strengths and weaknesses

Strong points of the renovation concept:•Lightweight envelope, ease of transportation•Performant materials, high energy savings•Compact, expandable easy to multiply

Weaknesses / aspects to be improved:•High cost for low income families•Lack of renovation funding and political instability in Romania•Lack of skilled labourfocer due to recent tallent immigration to neibouring countries