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- The Passive House in summer
- he surface temperatures are still somewhat warmer than the indoor air; however, this temperature increase is less than about ½ degree for the highly insulated solid bui... ill acceptable if h<sub>θ>25°C</sub> remains less than or equal to 10% of the year [[Basics:summer#Liter... 96] ]]. This value has only been exceeded by less than 1 % in the reference case being considered here.\
- Are Passive Houses cost-effective? @basics:affordability:investing_in_energy_efficiency
- e is more stable, more secure and more worthwhile than the alternative. Whoever wants “easy money” shoul... y the external wall will only be slightly thicker than it was before (about 25 mm) (see __**Fig. 2**__).... ll therefor be only 370 mm thick and thus thinner than the original one}// * In the roof, the insula... \ its thermal protection is still somewhat better than that required\\ by energy efficiency regulations
- Internal heat capacity
- the smallest and highest daily value is not more than 4 °C. It is evident that during the hot spell it is significantly cooler in the house than the peak value of the temperature outside. The r... al temperature is almost always considerably less than the indoor temperature and the solar gains are us... rgy will be required for this, which will be more than the amount saved by the increased storage capacit
- Passive House – the next decade | Determining application-specific PER factors @basics:passive_house_-_assuring_a_sustainable_energy_supply:passive_house_the_next_decade
- ts are still quite low for storage cycles of less than 106 hours. Seasonal storage capacity (with a little more than two cycles but low efficiency) accounts for only ... and; the storage capacity required is low at less than 62 Nm³ (cubic meters at normal conditions), and t... ly system, since it is not needed at all for more than half the year (summer!) and then is disproportion
- Primary energy – quantifying sustainability @basics:energy_and_ecology
- nmental damage from renewable energy is far lower than these from fossil or nuclear sources - but we can... ndard the heating energy demand decreases to less than half of the average value of old buildings**. Now... ctricity is as high as that for the heating (more than 40 % respectively). With the EnEV, the total prim... e to **reduce the electricity consumption by more than 50 %** in the Passive House in Darmstadt-Kranichs
- Thermal comfort parameters @basics:building_physics_-_basics:thermal_comfort
- he number of dissatisfied due to draughts is less than 6%) * the difference between radiant tempera... erature in various directions remains small (less than 5 °C, known as the "radiation temperature asymmet... the indoor air temperature stratification is less than 2 °C between the head and ankles of a seated pers... ceived temperatures in the room change by no more than 0.8 °C at different locations. Regarding the las
- The Passive House – historical review
- Southern China. In this climate, cooling rather than heating, is required.**\\ \\ In many climate regi... 9) was calculated as having smaller demand values than a Passive House, but unfortunately the consumptio... energy consumption for heating has remained less than 10 kWh/(m²a) since 1991, the savings in comparison with traditional buildings are higher than 90%. Very good indoor air quality has always been
- What is a Passive House?
- st of practice.\\ \\ Yet, a Passive House is more than just a low-energy building.\\ \\ * Passive Hous... of heating oil, Passive House buildings use less than 1.5 litres per square meter of living space per year – far less than typical low-energy buildings((Of cousre you norma... s where buildings require more energy for cooling than for heating. * Passive House buildings are al
- Greenhouse effect and climate protection @basics:energy_and_ecology
- oil and natural gas, leaving a remainder of less than 0.03% in the air. For the last two hundred years ... creased from 293 to 414 ppm in 2020, i.e. by more than 40%. The additional CO<sub>2</sub> is due almost ... of coal equivalent (TCE)** was about 40 % greater than that of the former West Germany (//image: Bundesr... the former East Germany were much less efficient than those in West Germany. It isn't the quantity of t
- Introduction - Passive House buildings in different climates @basics:passive_houses_in_different_climates
- \\ ===== Passive House buildings: a method rather than a building style ===== In Central European Clima... ed for heating. No other heat distribution system than just the air supplied for excellent indoor air qu... oor climate. * The solution should be simpler than ordinary buildings/systems used so far. Only affo... ensive. It is sufficient to use a lot less energy than in ordinary systems. At a factor of 4 to 10, the
- Efficiency vs. Efficiency Factor
- n most cases (or an extremely small value greater than zero).\\ \\ ===== Is that a purely academic issu... or of heating boilers cannot be increased to more than 100% (law of energy conservation) and today value... ure illustrates that increased efficiency is more than just improving\\ the efficiency factor. The effic... e. Thus, the total velocity v(x) is always higher than the velocity v<sub>0</sub>. \\ Now, as the body
- Life Cycle energy balances, Embodied energy and the Passive House Standard @basics:energy_and_ecology
- tion of a new Passive House can thus be even less than that of ordinary new buildings. * The cumulate... ergy demand for energy-autarchic houses is higher than that for Passive Houses, due to the large amount ... demand of the reference house is already greater than that of the low-energy house and that of the Pass... energy house to the Passive House is much greater than it is in the transition from the reference house
- Heating load in Passive Houses @basics:building_physics_-_basics
- ing demand in Passive Houses (typically no higher than 15 kWh/(m²a)) is negligible – only about 10% of t... assive House do not necessarily have to be higher than the costs in a conventional building. Nevertheles... s with heat recovery are generally more expensive than conventional building services systems.\\ ===== ... ifferences between rooms, can be more significant than the heat losses towards the outside. This effect
- Zero-energy and zero heating energy houses @basics:energy_and_ecology
- gy houses have an **annual heating demand of less than 70 kWh/(m²a) based on the living space**. Their h... energy consumption is thus about two-thirds less than that of an existing building. In Sweden at the b... too, the standard of construction today is better than that required by the government regulations.\\ \\... age in large storage units is more cost-effective than in small units.\\ \\ It therefore seems to be mor
- Local thermal comfort @basics:building_physics_-_basics:thermal_comfort
- en in winter (external walls, roofs etc. not more than 1 °C below the indoor air temperature, window sur... C if the external surface temperature is not more than 3.5 °C below the indoor temperature. The thermogr... en the head and ankles of a seated person is less than 2 °C - but only if the ** effective average U-value of the external building component is less than 0.85 W/(m²K)**. See. the illustration on the [[ba
- Efficiency of household appliances and their impact on the primary energy demand of residential buildings @basics:passive_house_-_assuring_a_sustainable_energy_supply
- Economy and financing of efficiency: new buildings, renovation and step by step retrofit @basics:affordability:investing_in_energy_efficiency
- Philips Experimental House Research 1974ff: Passive versus Active Measures in Europe & America @basics:the_passive_house_-_historical_review
- Factors that influence the energy balance and affordability of non-residential EnerPHit projects @basics:affordability:investing_in_energy_efficiency:economic_feasibility_of_passive_house_retrofits