In the proposed system service hot water is heated in a water tank that is heated by a hot water loop that is connected with a gas boiler.

Hi,

I have a question concerning  requirements of section 5.4.3.4 of ASHRAE 90.1-2007.

For the baseline model relative to a building where a part is residential (4 floors) and another part nonresidential (ground floor), shall the envelope of the nonresidential part respect the U-valu

Hi Marcus, it seems that this is a real issue in this forum and I ended up more confused.

Help me get this thing right

First, lets clarify some basic concepts:

Dear All,

Greetings,

Regarding modeling the Service Hot Water (SHW) for a project assigned to System 5, our approach was:

I have a 11000 sqm warehouse (3 units) 24/7 in operation with natural ventilation, no cooling designed or required, heated to 15°C. The OA requirement is met by the level of infiltration of 0.

Hi, I'm having a hard time trying to estimate my DHW Flow in the energy model for a residential project.

Hi,

Hello,

We received a review comment that states "the fan volume and fan power should be modeled identically in the proposed and baseline for semi-heated spaces".