Backup Heating Passive House Series

What messages could we possibly be trying to get across with props such as wine bottles, a hair dryer and a visit to the petrol station?!
As we have discussed throughout the video series to date, focusing on getting the Passive House principles correct for the building fabric is key (e.g. insulation, airtightness and thermal bridging) Now we talk about space heating demand and heating load and what these terms mean.
This latest video also covers the generation of the small level of required heating and how to distribute it throughout the Passive House ...

[@Energyquarter]

There are 3 air flow rate settings, commonly referred to as ‘boost’ (maximum mode), ‘normal’ (used 90% of the time) and ‘set-back’ (used to reduce air flow rate when the building is left unoccupied for an extended period).
The recommended air change rate for the entire building is between 0.3 and say 0.5 ACH.
It has been my experience living in a Passive House for the past 8 years that the humidity (at least in Ireland) is very comfortable in winter, with no dry skin or respiratory issues.

[@WolfgangFeist]

Really good video, Tomas. You show, how easy it is, to build and to run a passive house. It's nice to realize, that you will never ever have a problem with energy again in a passive house: These tiny little amounts of wood pellets will always be available. In depth information on heating for Passive Houses: www.passipedia.org/planning/building_services/heating_and_dhw/heating_and_dhw_systems

[@PelHeatShorts]

I do like the heater battery method of heat distribution, it saves time plumping in a radiator or under floor heating system.

[@divisioneight]

Very interesting Tomas. Questions;
The thermostat has three settings. When the house is unoccupied during the weekday, is the system left on "normal" mode or reduced?
Also, what about humidity control during winter months when the air is very dry and the humidity is low causing dry skin and respitory issues? Does the HRV also recirculate the needed humidity inside the house?
Again, wonderful videos, and a fascinating way to build a house.