What are the Essential Factors that Every Modern Home Needs in 2022?
Definitions and concepts
A passive house is not a building without heating but, by definition, a new or renovated construction, very comfortable and very economical, almost only heated by means of its double flow CMV.
Its insulating
mantle and its airtightness are
so effective there that the heat transportable by its ventilation system associated
with local,
renewable, and free energy, the rays
of the sun passing through the windows and heating solar collectors,
the fatal heat produced
by the occupants and their equipment as well as the heat recoverable from the stale air and
possibly the water in
the showers, supported by the heated towel rails on
exceptionally cold days without sun, is sufficient to do without a traditional heating system while
improving usual thermal comfort and
reducing energy needs,
bills, taxes, and pollution.
As per the Best Architects in Lahore knowledge collected from abroad firms are The two essential criteria of the
Passivhaus label, which PHPP calculations make
it possible to determine for new buildings, are the maximum active heating
power which must be limited to around 10W per m2 of living space on the coldest
days of the year, and the specific
annual heating need which must be reduced to less than 15 kWh of useful
energy per m2 of living space. When the climate
demands it, the criterion of air
conditioning is identical to that of heating. These
three criteria can only be met if the quality
of the airtightness, measured and guaranteed by an air permeability report from
an independent infiltrometry
operator, is at least four times more efficient than 'in RT2012. On
the other hand, in order to improve summer
comfort and reduce the need for air conditioning, even during a heatwave,
the cumulative annual period during which the temperature must not exceed 25 °
C must be limited to approximately 1 month per year. year. Finally, annual primary energy needs must
be limited to120kWh per m2
of living space to limit the use of the Joules effect and
encourage favoring renewable
energy capable of replacing it in a way that is much more
in keeping with the ecological
interest of this type of construction by Interior Designers in Pakistan
Criteria are also defined for passive
renovations. They are, however, less drastic than for new
constructions because some thermal
bridges cannot be removed and airtightness cannot
always achieve the same level of performance.
Such an efficient building is, most of the
time, heated free of charge and without pollution by the solar
contributions passing through the windows, the fatal
energy. Produced by its occupants and their equipment as well as by the
energy recovered in particular by the CMV. When the outside
temperature drops below normal or on days without sun, power of 10W /
m2 is generally sufficient to keep it in a comfortable
situation at 20 ° C. This is about 4 times less than an RT2012
construction, 10 times less than an RT2005 construction, and
30 times less than an old house with little insulation. Heating bills
decrease in the same proportions.
Construction Companies in Lahore
In a classic construction, it is the company
responsible for providing the heating which must ensure a situation of
comfort., in the coldest winter, by dimensioning a heating system capable
of compensating for uncontrolled heat losses and maintaining the temperature
around 19 ° C in all circumstances.
In a passive house, it is
the thermal characteristics determined during the
design of the project by the Architects in Lahore that are defined so as to obtain a higher comfort
situation, at 20 ° C, without the need for permanent
heating. The jacket consisting of insulation without thermal
bridge, associated with triple glazing, a double-flow CMV high performance possibly coupled with a Canadian well, and
a drastic control of the airtightness of the building must
make it possible to achieve this objective in association with the concepts
of compactness and thermal inertia and the Interior Designers in Lahore and Interior Designers in Islamabad from can look the following factors
- In winter, the low heating power required to ensure comfort on the coldest days of the year can be provided thanks to the permanent renewal of the air distributed by the double-flow ventilation network.
- In summer, a Provencal well allows the distribution of fresh air even during the day and reduces the risk of overheating without air conditioning.
The result is unparalleled in traditional construction: the investment, operating, and maintenance costs of the heating system are on the way to almost total disappearance. Those related to air conditioning are generally non-existent. When they are equipped with very low consumption lighting systems and category A household appliances, their primary energy requirement becomes so low that the lucky owners of such constructions will no longer run the risk of no longer being able to pay for energy which will undoubtedly become very, or even too expensive. Equipped with photovoltaic panels coupled with an energy manager and batteries, they can even produce more energy than they consume for all of their needs and approach almost total autonomy.
The energy efficiency and the unusual feeling of comfort that a passive house provides can naturally combine to achieve ecological efficiency. Unparalleled when its materials and equipment require little energy to use, store the carbon dioxide that we produce elsewhere and are recyclable. Such a building produces very little CO2 during construction and in operation. It, therefore, contributes both to the reduction of pollution without borders to which we, unfortunately, all contribute on a daily basis, to the protection of the climate and to that of our common health. Their ecological performance is among the best.
The low heating power that can be supplied by the incoming air from a double-flow ventilation system implies that the thermal performance of the house is very high and that, in the order of priority allowing the lowering of the prices of construction, it is:
- bioclimatic to recover the maximum amount of free and non-polluting solar energy,
- compact to limit the avoidable exchanges of energy through the walls facing the outside of the heated area, including the floor,
- airtight to guarantee the comfort of the occupants by avoiding too cold or too hot air streams which pass through the construction without the possibility of controlling them, limit the drops in performance of the insulation bypassed by leaks and prevent the heat or freshness is not thrown with them,
- very insulated without a thermal bridge for the same reason,
- And finally, when the house is passive because all the previous principles have been correctly implemented, equipped with all equipment allowing the use of free and non-polluting natural energies as well as recovery, like the heat exchanger. The heat from the double-flow CMV, from all the internal energy that can be.
Bioclimatic construction companies in Islamabad make the best use of their environment
A passive house must, due to the low power of its heating system, limit the need for energy to the minimum possible. It must, therefore, above all, be constructed with an optimized bioclimatic architecture because this design mode makes it possible to use and control free solar energy in order to limit the heating and air conditioning needs as well as the need to use materials, products, and equipment which should be even more efficient if the construction were more traditional.
Passive constructions are bioclimatic constructions that protect themselves as well as possible from the extremes of their environment
Compactness
The consequences on the need for energy
The consequences on the construction price with Construction companies in Pakistan
A passive house should be comfortable without conventional heating and air conditioning systems. In order to achieve this objective, the building envelope must be very efficient in terms of airtightness. In fact, the air which enters through the leakage passages causes not only an unnecessary source of energy consumption but also a very significant loss of performance of the insulators that it passes through or bypasses as well as of the double-flow CMV which then does not manage. Only part of the ventilation air. In addition, the cold air which enters in winter, just like the hot air which does so in summer, are sources of discomfort all the more marked as the thermal quality of the construction is also high. Finally, the leaks of hot and humid air, through exterior walls which can be very cold outside in winter, can cause interior risks of mold and damage in or on the premises.
Airtightness defects, easy to deal with inexpensively from the design phase, should therefore be reduced as much as possible in passive constructions. An infiltrometry test must be carried out at the end of the site to ensure that the air permeability of the construction is in accordance with what is planned.
It seems obvious that it would never occur to anyone to go out in winter with an electric heater under one arm and an electric battery under the other to make them work near him in order to be so warm. That there is energy. Yet this is what many French people have done for more than thirty years with their constructions. The right solution would have been to protect buildings like a coat or a down jacket for men does so well, without energy and pollution, even in the coldest climates. They should have been insulated rather than heated.
Heat transfers through a wall are proportional to their insulation quality, their thickness, and their surface in contact with the outside. The materials should therefore be weakly conductive and thicker than they usually are. Their surface should be limited thanks to the compactness mentioned above. Thermal bridges, which are weak points of the insulation, should be removed as best as possible and if possible in full.You can get these services by Interior Designers in Islamabad
In a passive house, the characteristics of the walls are not determined according to preconceived ideas that are too often wrong but calculated in such a way as to achieve the right level of performance without going beyond so as not to unnecessarily increase the construction price. These calculations have a significant cost, but the savings they can generate in terms of construction costs are much greater. It is also the only way to ensure that the construction will be passive without paying unnecessary additional costs for insulation.
A construction, even passive, which never requires energy for heating or air conditioning, hardly exists except in rare cases where the climate, little variable year-round or daily, is at the right temperature level. doubt the year. In other cases, it is necessary to heat in winter and, more and more often, to cool in summer. In passive houses, however, this need is so low that primary energy consumption can be at least largely covered by natural energies and those which are recoverable, all free, and non-polluting.
Windows can let in the heat of the sun controlled by sunshades. The double-flow CMV network can distribute the heat or the coolness transported by water heated by the sun's rays or cooled from the ground. Its exchanger can recover the heat of the stale air extracted in winter as its freshness during the hot summer days. Natural or mechanical night ventilation can provide important and welcome cooling to buildings in summer. The heat thrown in with the water from the showers can be recovered to preheat the drinking water before it is much more heated by solar panels ...
In short, the sun, water, and air, which are sources of Renewable Natural Energies, sustainable, distributed, non-polluting, unlimited and free, are all in the immediate current and future environment of each project. These SNRs are not produced but simply transported and sometimes stored. No other form of energy has so many qualities. None are as low polluting. Their two major drawbacks are, often but not always, their low power and their intermittence. Associated with energy recovery and possibly storage, they may be sufficient in a single type of construction, passive standard buildings.
From a technical point of view, it is a bioclimatic building,
used as a home, office, or any other destination, in which all the elements
have an impact on its thermal balance,
in particular solar gains, insulation. Without thermal
bridging, airtightness and heat recovery were optimized during the design
according to the environment and local climate. The
performance is pushed to the point where it becomes possible to replace the
powerful and expensive network of the conventional heating system, without
going beyond to limit the construction price, by that, very little powerful and
therefore very little polluting, of double-flow
mechanical ventilation whose presence is essential to
improve comfort and health. Its strong distributed ventilation with heat
recovery is in fact the only way to permanently maintain good indoor air quality,
in living rooms as well as service rooms, without significant variations
between the indoor air temperature and that of the air coming from outside. The network of this double-flow
CMV then becomes the active heating system responsible
for ensuring the best
possible thermal comfort by distributing the calories that
can be transported by the filtered fresh air, passively preheated by its heat
recovery unit, then actively heated by a hydraulic or electric coil, if
possible powered by heat sources
'renewable natural energies. When the outside
temperature is much colder than normal and the sunshine too
low, sometimes a few days a year but not necessarily every year, this comfort system may
be insufficient. The towel
warmers can then provide, without any other equipment, the additional heating missing
in order to maintain the usual comfort without compromising energy savings.
In order to comply with the definition of this type of
ecological house, the implementation of
suitable concepts and equipment, correlated so that their performance
is balanced and optimized thanks to specific thermal calculations,
is mandatory. They alone make it possible to ensure the adequacy between
initial objectives and concrete results, without the risk of not being able to
ensure comfort due to a heating system that is too weak, but without going
beyond that. to limit the price
of construction.
Possible to ensure that the definition of
passive houses would be respected. The multiplication of STDs has
made it possible to define the criteria allowing to do just as much with a simplified calculation method,
within the reach of the greatest number because developed in Excel,
the Passive House
Planning Package. Since then, compliance with the criteria when
designing a new building as
well as a renovated
building, and their controls during any labeling request,
can only be demonstrated by the implementation of this application. Their
real compliance can only be guaranteed for certified
construction.
Rather
than remedy thermal defects by increasing the production
of heating for comfort, the basic principle of
the new passive constructions or renovations is to remove to greatly
reduce the power consumption while targeting a higher
comfort with VMC PDF for only active heating systems.
·
Bioclimatic
design
·
A compact construction
is a building whose shape limits the surfaces in contact with the outside air,
the ground, or unheated spaces to limit heat losses in winter as well as
counterproductive heat inputs in summer. For equal living areas, the
surface area of the walls can vary by a factor of 1.5 between two
single-family houses and reach 3.5 by comparing this type of construction with
the dwellings of an apartment building. It is, therefore, preferable to construct
compact passive buildings to limit heat loss and therefore the need for energy.
In a traditional house,
the price of the walls increases in approximately the same proportions as the
compactness factor. In a passive house, the price increase is much worse. The
additional losses generally involve improving the performance of the external
load-bearing walls in the same proportions since there is no conventional
heating system whose power can be increased inexpensively to compensate for the
thermal fault. Fortunately, the price increase resulting from the
increased performance of the exterior walls is practically limited to the
materials and not to the labor. As a first approach, we can therefore
consider that their prices can vary by a factor equal to the variation of the
compactness factor in comparison with a compact construction with
equivalent living space! The search for the best possible compactness is
therefore one of the essential factors making it possible to limit construction
costs.
Airtightness
Thermal insulation
Natural and recoverable energies
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