May we open the windows in a passive house?
A passive house is built with windows that can be opened just as in any other house.
But with the mechanical controlled ventilation, you will not feel the need to open a window. When you wake up in the morning in your bedroom, for example, the air will be as fresh as in the evening when you went to bed.
The controlled mechanical ventilation will guarantee a minimum energy loss. If you ventilate by opening a window, the energy loss will be greater because the hot air escapes outwards. In winter, this energy loss has to be compensated by an additional energy input.
In a massive build passive house, this energy may come partially from the heat accumulated in the walls and massive floors.
What type of heating system is required for a PAMAflex house?
Because of the very low energy loss of a passive house, a system of conventional heating (boiler, radiator, fireplace, etc.) is no longer necessary. This is the reason why a passive house will not be more expensive when not even cheaper than a low energy house. The supply of solar energy and internal energy inputs like the warmth of humans, of appliances and technological equipment are almost enough throughout the year to heat up the house.
Therefore, we opt for electric heaters in one or two rooms of the house to bring a boost of energy during the coldest periods if needed. When producing this energy with photo voltaic panels, for example, you can easily make your passive house to a ‘zero energy ‘ house.
Can we have an open fire or a stove in a PAMAflex home?
Yes, you can certainly install a fireplace or a stove in a passive house. Because the energy need of a passive house is very low, it will be necessary to avoid a house overheating. You can obviously always open a window, but if you want to use an open fire or stove regularly, we advise to properly calculate the size of your fireplace and possibly think about producing not only warmth, but also hot water using this source of energy.
Why is a PAMAflex passive house not more expensive than a low-energy construction?
A low-energy construction already requested good insulation, high performance windows and a controlled mechanical ventilation. If you invest a little more at the level of insulation, windows, and the specifics of passivity, you may transform a low-energy house into a passive house. In this case all the conventional heating system you would need in a low-energy house can be removed. Elements such as boiler, tank, fireplace, heaters, gas connection are no longer needed. This very important cost gain compensates the more costs of constructing of a passive house.
How long will it take to build a PAMAflex house?
The total construction time of a passive house depends on the duration of the preliminary planning, the detailed planning and the material choices for the inside. After building the foundation, each level will take about one week to achieve the building shell. After that, the construction can be closed and the interior work will begin. The total construction may take 8 to 10 months.
Can a PAMAflex construction site be visited?
We would feel honored to welcome you at a construction site. Please notice, that you always must be accompanied by our representative on our sites because of security reasons. To visit a inhabited house, we would like to ask the residents for their consent.
Please contact us, we will arrange everything.
What aggregations and certificates do you have?
A passive house can only be built by registered and certified companies. Each house is planned by one of our certified passive house planners with the necessary expert knowledge and all needed practical experience. This way we ensure that the high quality requirements for achieving the passive house standard are reached.
Which guarantees do you give?
We give the statutory 10-year warranty for a passive house. Thanks to the massive construction, your house will withstand permanently. It can be hardly deformed.
We also guarantee the passivity of the building. Because of hardly being deformed, the wind resistance is permanently guaranteed. This is one of the very important criterions of the passive construction.
Is the passive standard still in the experimental phase?
No, certainly not. The passive standard is based on scientific studies that have been validated in several occasions. The first passive house was built 1991. Over the years, many data have been collected in passive houses. They confirmed the theoretical bases.
Currently, we are getting passive houses monitored. The first results also confirm the accuracy of the made assumptions. When the results of a sufficiently long period are processed, we will announce them here.
By the way: in the most European countries, the passive house standard will be a requirement for new buildings after 2017.
Can we asphyxiate in a passive house?
Despite its good sealing, it is unthinkable to get a lack of oxygen in a passive house. In case of failure within the heat exchanging system, you may simply open the window to ventilate. If the failure is occurred in the night, also do not worry. During the period of sleep, a human being uses a minimum of oxygen. A resting adult breathes 10 to 15 times per minute and exchanges 0.5 liter of air per breath. The person only uses about 30% of the contained oxygen. So, a human sleeping in a small chamber with 7.5 m² has enough oxygen for about twenty hours.
There is also the possibility of installing a CO2 sensor in your passive house which gives an alert in case of necessity.
May a house be zero-energy without being passive??
No ! It is absolutely necessary to be certified as a passive house to go further towards zero energy certification. First and foremost one should try to use the less heating energy possible.
If this small quantity of energy is provided by renewable resources like wood or solar energy, the passive house gets the zero energy standard.
A badly insulated house witch gets heated up by cubic meters of wood or by square meters of photovoltaic panels is not a zero energy building.
But, depending on the country or region, this answer could be different.
How does Santa Clause enter without a chimney?
He will come through the furnace pipe, and when no oven is installed, he will come through the Internet.