Compliance with Building Codes
The 2006 Edition of the U.K Building Regulations
Approved Document F1: Means of Ventilation
(applicable in England and Wales) details 4 clearly
defined systems of ventilation to dwellings. System 3 -
Continuous mechanical extract (MEV) is complied with
by the new VORT LETO MEV ultra-high efficiency whole
house extract ventilation system.
System 3- Continuous mechanical extract requires a
"minimum high rate" in each wet room to be achieved
(Kitchens 13 l/s and both utilities and bathrooms 8 l/s -
sanitary only 6 l/s).
The "minimum low rate" is calculated by taking the
number of bedrooms in the dwelling and applying the l/s
value from Table 1.1b (pag.26). In addition the rate
should be no less than 0.3 l/s per m_ of internal floor area
(all storey’s) plus for each additional occupant over and
above the anticipated two for the first bedroom and one
for each of the others a further 4 l/s must be added to the
extract rate. The system provides quiet, uninterrupted
extract ventilation from the dwelling via all the wet
rooms, creating a permanent air path through the
property from the “dry” habitable rooms to the “wet”
rooms.
The current Building (Scotland) Regulations refers to
continuously operating mechanical
extract ventilation in accordance with the guidance in
BRE (Building Research Establishment)
Digest 398, a paper based on the former government
department’s (and now private company)
own tests and recommendations , specifically 0.5 air
changes per hour throughout the property.
The VORT LETO MEV complies fully with the
recommendations contained within this document.
In Ireland, Technical Guidance Document (TGD) 2008
Part F: Ventilation is applicable and the Vort Leto MEV
complies fully with the recommendations contained
within this document.
With the Governments actively encouraging energy
saving and a target for all new homes to be ‘carbon zero’
by 2016, the VORT LETO MEV has been designed
‘future proof’.
The ‘Code for Sustainable Homes’ which came into
force in March 2007, details six levels of CO2 emission
improvement
over
2006
Building
Regulations
requirements.
To achieve the three highest levels of reduction of carbon
emissions, the air leakage of the dwelling must be
improved so significantly that continuous ventilation
becomes the only appropriate method. In addition, it
must be demonstrated that the ventilation system itself
must be energy efficient. The VORT LETO MEV has been
independently tested by the Building Research
Establishment (BRE) to the appropriate SAP (1)
Appendix Q test methodology and is therefore Appendix
Q eligible.
(1) The Governments Standard Assessment Procedure
(SAP) is a method assessing the
energy performance of dwellings and SAP Appendix Q
provides an allowance for the benefits of energy-saving
appliances; products may be independently assessed
and the results uploaded to the SAP website.
Description
Comfort and energy efficiency are becoming
increasingly important factors in buildings. With this in
mind, appliances are being developed to control the
micro-climate within homes and to provide a high
degree of comfort along with energy efficiency. These
appliances silently and continuously ventilate homes
removing humidity from service areas (bathrooms,
kitchens, etc.) and creating a flow of “dry” air in “lived-
in” areas (dining areas, studies, bedrooms, etc.). The
Vort Leto Mev range of centralised ventilation systems
has been specifically designed for continuous
ventilation in domestic applications, but may also be
used in some commercial applications.
The Vort Leto Mev range consists of 3 products all of
which are fitted with brushless three-phase motors
with electronically controlled three-speed operation:
VORT LETO MEV
;
VORT LETO MEV RF
with solar-powered remote
control unit;
VORT LETO MEV RF AUTO
with Relative Humidity
sensor and remote control unit with display.
The Vort Leto Mev is a modular appliance that means
maintaining and replacing parts is both quick and
easy.
The appliance can be wall or ceiling mounted. The unit
has 5 vents: the one positioned at the top right (fig 1)
is for expelling stale air; the other 4 (fig. 2) extract
humidity and stale air.
1
1
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ENGLISH
