help needed interior rendering noise

[gilhal]

hi guys
i am rendering a series of showers HDRI in background few lights from above and a side rectang light. chrome Fresnel is 3 , the rest quite regular. i cannot get rid of graininess no matter what i do
what can i do ? attached image after 4 hours render (29 passes) 

[Nekrobul]

There is problem in not in the noise it self but in the rendertime. Can you show what the wall mtl look like and show the albeedo pas?

[Tanakov]

Try checking your GI and DI pass, then check if you dont have some ridiculusly bright lights.

Some colours may cause noise if they are too bright. (Thats what she said).

Also your glass might be the reason why this happends.