Mastercare for - Passivent

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VENTILATION DESIGN & WARRANTY PACKAGE
The intended use of a building affects its ventilation requirements.
Domestic properties require the extraction of humidity
and removal of internal pollutants. Commercial buildings
need to reduce overheating and introduce fresh air to minimise CO2 levels and other indoor pollutants. These two distinct sectors
require different ventilation strategies and are guided by separate
legislation.
Reflecting the differing market sectors, Passivent has two product
groups, Passivent Domestic and Passivent Commercial providing
specialist expertise and products.
Passivent’s natural ventilation design service reflects the building's
requirements and the appropriate legislation. Both product groups
offer standard or extended warranties covering design and product
performance.
PASSIVENT NATURAL VENTILATION DESIGN SERVICE
Passivent offers a design service to clients considering the incorporation
of Natural Ventilation within their building services strategy.
The minimum design is based upon defined relevant industry guidance
documents. Design assumptions used as the basis of the calculations
are shown in the individual project proposal.
The design service is provided to assist the client to establish and
specify the natural ventilation design, however it remains the
responsibility of the client or his advisor to verify the design's suitability
for the project.
Standard Design and Product Guarantees
Passivent will design a natural ventilation system based upon the
appropriate design process and information provided by the client.
The design will achieve regulatory compliance, and for Commercial
projects, will show the Peak design temperature and Air-Change
rate. The proposal will list the ventilation components and recommended
control system. All Passivent components are covered by a
full twelve months parts and labour guarantee.
(This is in addition to statutory rights).
Enhanced Mastercare Design and Product Warranty
As an additional service, an Insurance Backed Design and Product
Warranty can be offered on projects with a component value exceeding
£5,000. Following completion of the installation of the full designed
system into the building, Passivent will extend the guarantee to a term
of twelve years from the date of practical completion of the main contract.
The Mastercare Warranty must be requested at design stage, and
is subject to the warranty terms. The company's agreement to the provision
of the extended warranty must be gained, prior to issuing
Tender Documents requesting the Mastercare Warranty.
Mastercare Design and Product Warranty Terms
1 The natural ventilation scheme is adopted in its entirety, with all
components being sourced from Passivent.
2 A trained and registered Passivent Mastercare installer, who as an
independent contractor, can provide an installation warranty, carries
out the installation.
3 The ventilation components installed are maintained in accordance
with the manufacturers maintenance instructions.
4 Payment for the materials and installation has been made in full.
5 A formal request for the Mastercare Design and Product Warranty
is made during the design process and prior to tender. The company
will require up to five weeks to consider an application.
6 All electrical components are excluded from the extended warranty
period.
Assignment of Warranty
With the written authority of the company,
the Warranty can be
re-assigned once.
Please refer to the Terms and
Conditions on the reverse of the
example Mastercare Certificate
for full warranty details.

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Natural Ventilation Design for Commercial Buildings
Passivent base the design service upon the guidance issued by the
Chartered Institute of Building Services Engineers (CIBSE) in the
Applications Manual AM10: 1997, Natural ventilation in non-domestic
buildings. Reference is also made to associated CIBSE Guides,
The Building Services Research and Information Association
(BSRIA) Guidance note 7/2000 Making Natural Ventilation Work,
and for Schools, The Department for Education and Science (DfES)
Building Bulletin 87.
The design process is aided by the use of software design tools such as
the NATVENT calculator tool for Passive Stack Ventilation and CIBSE
Guide A Admittance Method, for Peak Temperature Calculations.
Additionally, Passivent have an independently produced, unique
design tool to predict wind driven displacement ventilation for the
Airscoop range of roof mounted devices, based upon two years of
monitoring and research by the Silsoe Research Institute (SRI).
Where design guidance documents are superceded, Passivent will
adopt the latest guidance available at the time of design, within the
proposals.
Design Process
The building’s unique characteristics are examined such as its shape,
size, location and construction. Additionally the internal and external
thermal loads are defined, together with external factors such as
orientation, height and individual site meteorological data. Target
ventilation rates are defined based upon occupancy, and the most
appropriate natural ventilation design strategy is selected. The individual
project design shows the specific design criteria and assumptions
adopted.
By careful evaluation of the room with the highest heat gains, its
ventilation requirements and construction constraints, the appropriate
ventilation components are selected enabling peak room temperatures
and air-change rates to be defined, within standard design
risk parameters.
Passivent Ventilation Components
Knowledge of the specific performance of the individual components
within the system is essential. The weatherability and structural performance
of the product range along with the discharge / entry co-efficients
have been independently tested and certified by BSRIA, SRI and
BRE. This ensures that calculation of the natural driving forces combined
with the components individual pressure drops results in an
accurate prediction of the resultant room air-change rates.
Recognising the increased use of “Brownfield” sites for new developments,
all ventilation systems can be acoustically enhanced.
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PASSIVENT LIMITED
2 Brooklands Road, Sale, Cheshire M33 3SS Tel: 0161-962 7113 Fax: 0161-905 2085
Email: info@passivent.com Web: www.passivent.com
Passivent Limited maintains a policy of continuous development and reserves the
right to amend product specifications without notice.
A member of the Building Product Design Group
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Natural Ventilation Design for Domestic Buildings
Passivent offer both Passive Stack Ventilation and Assisted
Ventilation Whole-House Systems, which are covered by Passivent's
British Board of Agrément Certificate, No 96/3273. The designs follow
the guidance of the Building Regulations, Part F1; Means of
Ventilation. Part K of the Building Standards in Scotland;
Ventilation in Buildings, and Part K2; Means of Ventilation in
Northern Ireland. BS 5250: 2002 Code of practice: the control of
condensation in buildings.
Passive Stack Ventilation (PSV) system design additionally recognises
the recommendations of BRE Information Paper 13/94: Passive
Stack Ventilation in Dwellings, BS 5925:1991 (1995) Code of
Practice for ventilation principles and designing for natural ventilation.
UMIST Report: The performance of tile ventilators as passive
stack ventilation terminals, Feb 1996. UMIST Report: The influence
of duct bend angles on the performance of passive stack extract systems,
Feb 2003.
Assisted Ventilation design also follows BRE Digest 398, 1994
Continuous mechanical ventilation in dwellings: design, installation
and operation, and BS5720:1979 Code of Practice for mechanical
ventilation and air conditioning in buildings.
Acoustic systems can be individually designed to meet the noise
reduction targets of the client or local authority. Passivent design to
satisfy DETR PPG24, BS 8233:1987 Sound insulation and noise
reduction for buildings and BRE Digest 338, 1998 Insulation against
external noise.
Where design guidance documents are superceded, Passivent will
adopt the latest guidance available at the time of design, within the
proposals.
Design Process
Passive Stack design incorporating Passivent’s innovative humidity
sensing technology is suitable for buildings to a maximum of three
storeys where vertical extract ducts can be accommodated. For larger
or more complex building layouts or for multi-occupied buildings,
Assisted Ventilation is often a more practical solution.
For individual apartments, where separate ventilation systems are
preferred Passivent’s “Apartment Air” assisted system offers an energy
conscious alternative.
Recognising the increased use of “Brownfield” sites for new developments,
all ventilation systems can be acoustically enhanced.
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Produced by Ted Hastings/Rackley Design 11/03