A PH builder is now going for PEH. They still do the old PH but have now (off-the-rail!) their PEH certified with the official seal of the PHI.
The two together, PH and PEH in one piece.
According to the magazine Passivhaus Kompendium ( http://www.phk-verlag.de/
) the builder Kampa has turned their certified PH into an energy plus house and sells it, ready to go.
Kampa has this show building open for public viewing in Leipzig/Germany. See picture and article here: http://www.phk-verlag.de/news/newsdetails/artikel/plus-energie-passivhaus-von-kampa/
Before going into a logic discurse I'll translate from the text page of the PH Kompendium, using google translate:
" Highlights are also found in the technical area. Passive construction in this case means: only 15 kilowatt hours per square meter (kWh / m²) heating demand, at a primary energy requirement of 79.5 kWh / m² per year after phpp and 13.2 kWh / m² per year after EnEv. This ensures even "KfW 40", which guarantees the bottom line is adjacent to the conveyor a loan repayment grant of 5,000 euros from the Kreditanstalt fur Wiederaufbau (KfW). The project is also funded by the Saxon and the Saxonian AufbauBank Energy Agency (Saena), allowing a further grant of 14,000 euros in funding (€ 100 / m² of the so-called "energy reference area").
In plain words:
The Kampa PEH is constructed to PH standard, the PHPP gives 15kWh/m2a as heating demand and a primary energy demand to cover this of 79.5kWh/m2a.
The 'German energy saving law' (EnEv) calculation result for the very same building is 13.2 kWh/m2a primary energy demand.
That's a difference of 66.3 kWh/m2 per year. Or the equivalent of 5 EPHs supplied with as much primary energy as 1 PH.
Factor 5 !
That's a good progress, achieved with 130m2 of building integrated PV delivering energy instead of sucking it from the grid....
As said, it is designed according to the PHPP, so the usual-bolt-on-technologies are used: ventilation system with underground heat exchanger, air to air heat-pump and so on.
Real good PEH neither use a heat pump nor ventilation systems !
The new Kampa PH/PEH uses two sections of thin layer PV, one for the each side of the roof.
With better PV modules ( mono crystal instead of thin bed ) the bolt-on-technologies could have been saved, dumped altogether.
Instead of using expensive bolt-on-technologies to get to the PH standard (of max. 15kWh/m2a) the ventilation could be done manually by opening the windows on demand. And the heating by electric resistance or stove.
But this aproach would drive up the PHPP calculated of 15kWh/m2a because of the 'wastage' of warm stale air.
The project wouldn't achieve the PH criteria, it's official seal.
Just to get this official PH seal the builder has to throw-in the usual clutter like heat recovery ventilation system and air/air heat pump. Just for the seal.
Without heat pump and heat recovery the PHPP calculated heating demand would be higher than the maximum 15kWh/m2a as allowed under the PH standard.
It would have been better for the consumer's pocket AND the environment to accept a higher space heating demand AND generating more electricity. By this way the primary energy usage would be lower than with a building following the merchandising logic of the PHI.
That's the reason why the international building community has dropped the PH concept, it has no future under the premise that buildings should use as little as possible primary energy, that buildings must produce a primary energy surplus. Instead of being an eternal drain to wealth and resources.
The PH doesn't pay, it costs.
The PH specialist Kampa has proven this. Black on white, using the PHPP. Visit the show house in Leipzig.
Ignorance sold with a seal.
Here the Kampa home page:http://www.kampa.de/
Four languages can be chosen, German, Italian, Tschechian, Hungarian, see top of the page.