Relative Humidity

Help and discussion on using the Detailed HVAC option

Moderator: DesignBuilder Support

Posts: 26

Relative Humidity

Postby HeaCoo » Tue Apr 18, 2017 10:28 am

I have some problems to control the relative humidity in an zone (40 – 60%) in design builder.
Detailed HVAC is used: "7-multizone humidity maximum" & "6-multizone humidity minimum"

The DB result viewer shows relative humidity up to 70%, so the system is not working.

Error in .idf file:
** ~~~ ** name = X08VERGADERRUIMTE:ZONE1
** ~~~ ** sensible cooling load = 1934.35 W
** ~~~ ** ...thermostat set point temp = 0.000 C

However, the zone setpoint for heating is set to 21,5°C
Berchem SP heating,
Any Number,
Through: 12/31,
For: AllDays,
Until: 24:00, 21.5 ;

Can somebody have a look to the design builder file or .idf and tell me what I have to change?
Posts: 1
Location: Bulgaria

Relative Humidity

Postby Jeffviso » Sun Oct 22, 2017 12:28 am

Could you please send me the formula for calculating relative humidity from temperate , specific humidity and mean sea level pressure? thanks in advance.
Posts: 10

Re: Relative Humidity

Postby maciejd » Mon Nov 06, 2017 11:48 am

I encountered the same trouble. You have to set desirable relative humidity deadband in the activity tab data.

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