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I work in construction and property maintenance as a building technology consultant.

For a long time, the objects of interest have been building automation, the management of building pressure ratios through ventilation, the development of digital building technology for indoor conditions and energy management, and the smooth and intelligent implementation of building projects without major problems.

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Energy savings can be obtained by repairing and renewing ventilation ducts, and all of this can be verified with an energy calculation.

How?

-Leaks in non-tight ducts are significantly reduced, by sealing it is possible to reach an air leak of up to < 1%

-The ventilation machine's fan energy (electricity) decreases

-The heat and cooling energy used by the ventilation decreases as the air volume decreases.

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When using AEROSEAL technology, the repair cost is typically 25...30% of the duct renewal investment and the cost of energy savings can be used to obtain electricity 60...70% / y and heating 20...30% / y. So the life cycle cost can be good and less than 10 years.

US research project, repairing ventilation duct sealing and repairs energy consumption effects, 63 properties:

https://www.mncee.org/retrofit-duct-sealing-commercial-institutional-buildings

When ducts are renewed with prefabricated type-approved parts, the life cycle cost can be satisfactory over a 50-year calculation period. This, of course, requires calculation as a basis.

Renewal, of course, has clear advantages in terms of the use and control of ventilation.

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Retrofit Duct Sealing in Commercial & Institutional Buildings

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The growing recognition of duct leakage as a major cause of HVAC energy waste provided motivation to explore the possibility of retrofit duct sealing as an energy efficiency opportunity in Minnesota. This project characterized duct leakage in several types of Minnesota C&I buildings, completed retrofit duct sealing on a subset of C&I duct systems, and estimated the energy savings and cost effectiveness of retrofit sealing measures.

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In general, when ventilation ducts are repaired by sealing, a fraction of carbon emissions are produced when the ducts are renewed. Why?
REPAIR BY SEALING:
- only sealant for the manufacture and transport of vinyl acetate polymer
-only contractor's on-site logistics
-only the electrical energy used by the sealing and pressure equipment during the work
-no demolition and waste disposal
RENEWAL:
-manufacturing site activities
-energy use and materials loss on the construction site
-transport of new and dismantled material waste treatment and disposal

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In the method, a particulate sealant is sprayed into the ductwork, which only applies to the leaks and closes them.

Vinyl Acetate Polymer. Used in the food industry.

The sealant is non-toxic (the same substance is used, for example, in chewing gum, craft pulp, in special hair and hair sprays)
- the seal withstands duct cleaning

The substance is introduced into the duct system at a certain temperature and compressed air, the method can be used to seal leaks up to 15 mm in diameter.

The system treated with the method withstands a pressure of 2000 Pa and keeps the duct tight for up to 30 years.

Meets fire resistance rating requirements
CLASSIFICATION OF FIRE PERFORMANCE
STANDARD NF EN 13501-1 + A1: 2013

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The calculation will be based on the Finnish Ministry of the Environment's low-carbon building assessment method (YM 2019) or the next update.

The emission factors come from the national https://co2data.fi/rakentaminen/ emissions database.

The calculation is performed using OneClickCA software. The calculation data will be updated with the software vendor to make the low carbon content of the ventilation ducts as suitable and easy to use as possible.

The GWP effect of the results is expressed in kgCO₂e / m² / a.

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Insulation and water proofing

Mineral materials and glass (excluding concrete)

Floorings and surface materials

HVAC products and electrical installations

Infra, yard, and foundations

CONSERVATIVE VALUE, GWP (A1-A3)

TYPICAL VALUE, GWP (A1-A3)

Not for building permit calculations

Energy scenario

Benefit allocation method

Values for building permit calculations, GWP

Energy scenario

Not for building permit calculations

Calculating yearly values

Values for building permit calculations, GWP

Values for years in between scenario years are to be calculated in linear fashion. If 2020 value= 0.153 and 2030 value=0.089
For example, a scenario value for a year 2024 can be calculated by taking value of year 2020 and adding to it one tenth of the difference of given values (2030 value - 2020 value) multiplied by number of years from the beginning of the given period (2024 - 2020 = 4)

Then 2024 value = 0.153 + (0.089-0.153)/10 *(2024-2020)=0.127

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Insulation and water proofing Mineral materials and glass (excluding concrete) Floorings and surface materials HVAC products and electrical installations Infra, yard, and foundations CONSERVATIVE VALUE, GWP (A1-A3) TYPICAL VALUE, GWP (A1-A3) Not for building permit calculations Energy scenario Benefit allocation method Values for building permit calculations, GWP Energy scenario Not for building permit calculations Calculating yearly values Values for building permit calculations, GWP Values for years in between scenario years are to be calculated in linear fashion.

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The calculation will be commercialized in cooperation with IML-Ilmastointimittaus Lind Ltd, a contractor using AEROSEAL technology, and at their work sites.
The calculation service is offered in connection with sealing contracts and as a separate service.

The distribution of the service has been agreed to be carried out by AEROSEAL -contractors in the European market:
https://www.mez-technik.de/

As a further development project, the aim is to simplify computing, for example, to use spreadsheets with a program.

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MEZ-TECHNIK GmbH | Produkte & Services für bessere Luftleitsysteme | Webshop

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Unser Webshop umfasst 5000 Produkte perfekt abgestimmt für alle Produktions-, Montage-, oder Servicearbeiten an Luftleitsystemen. Unser 360° Portfolio umfasst alles was Sie in der Luftkanalbranche brauchen.

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Funding is needed to pilot the actual site and develop the computation.

The financing application is prepared and submitted to Business Finland:
https://www.businessfinland.fi/en/do-business-with-finland/home
Fin:
https://www.businessfinland.fi/

and the Finnish ELY Center:
https://www.ely-keskus.fi/en/web/ely-en
Fin:
https://www.ely-keskus.fi/fi/

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Luomme uutta kasvua auttamalla suomalaisia yrityksiä kansainvälistymään sekä tukemalla ja rahoittamalla niiden innovaatioita.

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MR Ilkka Piittisjärvi

+358400871171

ilkka.piittisjarvi@gmail.com