Heating and Cooling

The length of heat distribution pipes should be kept… 

as short as possible.

What is the space heating demand for a Passive House?

The amount of heat/energy needed to be supplied by a heating system for a season/year

When calculating transmission heat losses what climate parameter is used for heat load calculations?

ΔT

What is the typical heating load in a Passive House?

3.17 Btu/hr.ft²

Which energy demand is typically higher in a domestic new build Passive House?

DHW energy demand

What is the COP (Coefficient Of Performance) for a heat pump that uses 800 Watts of electricity to create 2,400 Watts of Heat?

3.0

What size boiler is needed to heat a house with 2000 ft² TFA (Treated Floor Area) and heat load of 3 Btu/hr.ft² ?

6.00 kBtu/hr

What would you say about this picture?

Heat Losses are High in this system

Do we usually equip bathrooms in a Passive house with additional heat supply system?

Yes

Approximately, how much energy is in 1 therm of gas?

100 kBtu

Where should a space heating element be placed in a Passive House? 

Anywhere

What thickness of insulation is required for a heated supply air duct outside the thermal envelope?

6 inches

Which of these ducts have to be insulated? 

Ducts between ventilation unit and thermal envelope

What is the default for specific internal heat gains (qi) in the heating load calculations?

0.51 Btu/hr.ft²

Which of these distribution in the insulation layer is better? 

Note: In this case the orange represents insulation and the purple represents concrete.