Contractor

Name : Project15

Contact : Stefan Pallantzas

Construction Manager

Name : Project15

Contact : Stefan Pallantzas

Stakeholders

Function : Certification company

HELLENIC PASSIVE HOUSE INSTITUTE
Ioannis Pappas
Passive House Training , Consulting and Certification

Contracting method

Other methods

Owner approach of sustainability

• The main energy efficiency measures carried out were the following: external insulation of the entire façade and roof
• replacement of windows and frames with triple glazed windows
• optimization of shading and solar gains through automatic blinds and a surrounding garden
• improving airtightness of the building, paying special attention to even small amounts of uncontrolled leakage through frames, electrical and plumbing gaps by using methods such as airtight membranes sealed with special silicone
• installation of a heat recovery ventilation system for each space (house and office) to improve the indoor air quality and for preheating or precooling the air
• installation of a split cooling and heating system (one in the living room and other in the office) to cover occasional heating and cooling demand when necessary
• installation of a solar thermal system for hot water
• removal of conventional radiator system and all other old units, as well as the fireplace
• use of energy efficient elements for the lighting system 
• high-efficiency appliances
• automatic display monitoring system for control and measures
• installation of a PV system to cover all the energy consumption needs 

Architectural description

The building is located at the Municipality of Papagou, Athens  and was built back in 1964 on a 520 sq.m. corner plot, the two facades looking Northeast and Southeast. 

It consists of 2 units; a 98,80 sq.m. 2 bedroom private residence on the ground floor and a separate semi-basement 43,60 sq.m. storage/boiler room; the last one will be converted into an office.

If you had to do it again?

I would do exactly the same ! Me and my team have enjoyed this project, have learnt a lot and have grown our business. Me personally enjoy living in a passive house with perfect comfort conditions and very low energy consumption.

Building users opinion

If you live in a passive house, you are a lucky guy!
This project is a critical point on the road to the greek NZEB building of the 2020. We want to show to the people, to the engineers, to the market, to the government that consuming much less energy is achievable and cost effective. And after that, it's easy, using renewables sources, to achieve a house which has a positive energy balance that means a real sustainable house.
The way of design and step-by-step implementation, and the subsequent monitoring and metering project promotes collaborative processes among executives of HPHI, certified passive building designers, engineers and technicians from all sectors and commercial and technical department of companies manufacturing and marketing passive house components.
It offers to every citizen through open public data all the information required on how to drastically save energy in his house, while improving quality of life and contributing substantially to the fight against global warming.
After completion of the project the house acts as media and collaborative process hub aimed to prove in practice the ability to upgrade the energy consumption of residential buildings in Greece and the Mediterranean area , so they do not need conventional heating or air conditioning, while drastically reducing energy costs and improve the quality of life in them. And all this at an acceptable cost to the community. Specifically the project will implement the following action axes:
. The ground floor of the project acts as an open residence for seven consecutive years, open for guided visits, lectures and presentations to the public and to engineers, etc More than 1.500 have already visited the house.
· The space of the basement serves as headquarters of HPHI as well as a venue of seminars, training, materials showroom etc. We have done already 16 big courses and more than 100 architects and engineers were trained and certified here.
· HPHI created the project website and will cover via an interactive blog all steps and aspects of the project. On the website every citizen can be informed on how to design, stages of implementation, the specifications of materials and controls, and to see online measurements and actual operation and consumption of the building. On the other hand, all companies participated in the project will have access to all data available, concerning the behavior of the building, of all materials and equipment and will cooperate with HPHI and the project management in order to improve quality of their products.
The team developed media material available to everyone, videos, posters, pamphlets, a technical handbook etc. The building is the first certified as a EnerPHit Plus in the Mediterranean Area, which means it is the first Building in the region, producing more energy than consuming.
For now this amount of energy will be sold to public energy company via net metering, but in the future we are thinking of making the building totally autonomous.

Energy consumption

• Primary energy need : 85,00 kWhpe/m².year
• Primary energy need for standard building : 623,00 kWhpe/m².year

Calculation method : Other

CEEB : 0.0094

• Final Energy : 29,90 kWhfe/m².year
Breakdown for energy consumption :

Heating (incd. aux electricity of HP) = 6.6 Kwh/m2a
Cooling and dehumidification (incd. aux electricity of HP): 5.55 Kwh/m2a
DHW generation (electricity) : 2.2kWh/m2a
Household electricity (appliances, lightning, ventilation) : 15.58 kWh/m2a

More information :

We get 92% of DHW by solar panels. We produce more energy in average total yearly with our PV system , than we consume.

• Initial consumption : 300,00 kWhpe/m².year

Envelope performance

• Envelope U-Value : 0,33 W.m^-2.K^-1
More information :

The enerPHit consists of:
Roof, external insulation = 30 cm of EPS [λ=0,030 W/(mK)]
Ext. walls, external insulation = 15 cm of EPS [λ=0,030 W/(mK)]
Floor slabs, internal insulation = 5 cm of EPS [λ=0,030 W/(mK)]


• Building Compactness Coefficient : 0,88

Indicator :

• Air Tightness Value : 0,56

Real final energy consumption

28,46

28,46

2 017

Systems

Heating system :
• Heat pump
• Canadian well
Hot water system :
• Solar Thermal
Cooling system :
• VRV Syst. (Variable refrigerant Volume)
• Canadian well
Ventilation system :
• Natural ventilation
• Double flow heat exchanger
• Canadian well
Renewable systems :
• Solar photovoltaic
• Solar Thermal
• Heat pump
• Renewable energy production : 127,00 %

We just use a single minisplit unit in the residence and another one in the office to heat and cool the building.

Our PV system is just 3.5 KWp and covers total needs.
Our solar system covers 92% of needs.

Smart Building

BMS :

The Building has a measuring system. We measure temperature and humidity, internal in three rooms and external, Co2 inside and Sound in and outside. We measure electrical consumption, for heating , cooling, DHW, appliances, ventilation. We have dat of 3 years and we publish them in our website every month.
Having this online data, we use simple apps to control our heating/cooling/ventilation system via internet. So we can simple automatisation for cooling and heating , keeping the house always between 20 and 25 degrees Celsius.

GHG emissions

• GHG in use : -13,78 KgCO₂/m²/year
• GHG before use : 172,50 KgCO₂ /m²
• Building lifetime : 50,00 year(s)

, ie xx in use years : -12.52

Water management

• Consumption from water network : 75,00 m³

Water Consumption/m2 : 0.66

Water Consumption/Dwelling : 37.5

Indoor Air quality

Perfect conditions via mechanical ventilation with Heat recovery. F7 filters used for the incoming air, G4 filters used for the extracted air. 

Health & Comfort

Health & comfort : All envelop and windows calculations were done in order to minimize thermal bridges and any risk of mould. 

Calculated indoor CO2 concentration : 600 ppm

Measured indoor CO2 concentration : 625 ppm

Calculated thermal comfort : between 20 - 25 degrees celsius according to PH standard.

Measured thermal comfort : between 20 - 25 degrees celsius

Acoustic comfort : Under 35 db

Product

Pluggit AD160
PLUGGIT
http://www.pluggit.com/portal/de/kontakt-5

Product category : Génie climatique, électricité / Ventilation, rafraîchissement

Ventilation Unit with Heat Recovery

Very good heat recovery performance , low noise!

DAIKIN FTXM/RXM Mini Split
DAIKIN EUROPE
DAIKIN HELLAS

Product category : Génie climatique, électricité / Ventilation, rafraîchissement

minisplit unit for heating/cooling , very good perfomance, R32 , the only A+++ at that moment in the market.

It was the best product we found on the market with an extra ordinary SEER of 8 , which is real!

Construction and exploitation costs

• Renewable energy systems cost : 5 000,00 €
• Total cost of the building : 57 150 €
• Subsidies : 40 000 €

Energy bill

• Forecasted energy bill/year : 150,00 €

Real energy cost/m2 : 1.32

Real energy cost/Dwelling : 75

Urban environment

The building is located in Papagou. The area is known as a low impact urban area , designed and developed during the 60's by the greek army for its personell. So the area was full of nice 500 m2 plots and single family houses. Papagou is the nearest suburb of this kind to the center of Athens. The area of the building is just 2 minutes or 500 meters to the highway conection, 20 minutes to the international athens airport and 1.5km or 20min by feet to the metro station and then 12 minutes to the center.  

Land plot area

520,00 m²

Built-up area

20,00 %

Green space

350,00

Parking spaces

2 parking places inside the plot

Building Environmental Quality