ventilation of dwellings, decentralized, 6 x 120 m3/h, polyethylene ducts, with earth tube heat exchanger, UPR, ecoinvent 3.6, Undefined

ISIC4 categories:
F:Construction/43:Specialized construction activities/432:Electrical, plumbing and other construction installation activities/4322:Plumbing, heat and air-conditioning installation
CH - Switzerland
Reference year: 2003 - 2003

Location: CH - Switzerland
Life time of system and ducts 50 years. Life time of ventilation unit 20 years. Life time of filters 1 year. Ventilation system for a multi family house. The house considered in the investigation includes 6 flats with 130 m2 floor area each and a ventilation rate of 120 m3/h. The influence of a smaller concrete demand due to embedment of ventilation tubes in the concrete of the floor (-4.86 kg concrete per m2 floor area) is not included.
[The full documentation of this dataset was originally provided in the corresponding ecoinvent report from the Swiss Centre for Life Cycle Inventories, which is accessible for free to guests and users of ecoinvent version 2 ( The dataset may subsequently have been subjected to central changes to the database, as described in the respective change report for each new release.]
Undefined unit processes (UPRs) are the unlinked, multi-product activity datasets that form the basis for all of the system models available in the ecoinvent database. This is the way the datasets are obtained and entered into the database by the data providers. These activity datasets are useful for investigating the environmental impacts of a specific activity (gate-to-gate), without regard to its upstream or downstream impacts.


Electricity demand of ventilator (0.4 Wh/m3) representative for DC- or EC-motors and a system design with low pressure drops. Electricity demand of control unit 10 W. Decentral ventilation system including 4 parallel polyethylene ground heat exchanger tubes (200 mm diameter). Air distribution to the 6 decentral ventilation units with a galvanised steel tube (400 mm diameter). Distribution of fresh- and exhaust-air within the flat with polyethylene tubes (75 mm diameter). Exhaust air from the 6 decentral ventilation units with a galvanised steel tube (400 mm diameter) to the exhaust on the roof.

Process type
Supported nomenclature
ecoinvent 3.6
LCI modeling approach
Before modeling
Multifunctional modeling
Aggregation type
Data provider
Review status
For sale

ecoinvent EULA