1/2 bath vent fan

[mortimer]

is one required?

 

[david]

is one required?

That's a building code issue, but normally if you have natural (window) ventilation, a mechanical vent would not be a requirement in a dwelling

 

[mortimer]

nope, no window

 

[Coppersmith]

In my jurisdiction a fan is required regardless of window being present. Check your building code.

 

[Chamuit]

In mine, the window opening has to be a minimum size or a fart fan is required.

 

[construct]

The ICC codes (adopted as is) only require one if there is a tub or shower.

 

[JoeyD74]

From what I can find in MA, section 1203.4.2.1 ventilation, it states a fan is required if there is a tub or shower.

 

[david]

nope, no window

1203.4.2 Contaminants exhausted. Contaminant sources in naturally ventilated spaces shall be removed in accordance with the International Mechanical Code and the International Fire Code.

1203.4.2.1 Bathrooms. Rooms containing bathtubs, showers, spas and similar bathing fixtures shall be mechanically ventilated in accordance with the International Mechanical Code.

 

[infinity]

What contaminant sources are there in a bathroom? Are the normal things that a bath fan would vent actually contaminants?

 

[LarryFine]

What contaminant sources are there in a bathroom? Are the normal things that a bath fan would vent actually contaminants?

They are at my house.

 

[mortimer]

The ICC codes (adopted as is) only require one if there is a tub or shower.

The IRC requires one to be vented outdoors. For "toilet rooms"

 

[construct]

The IRC requires one to be vented outdoors. For "toilet rooms"

That's my bad. I was confusing the requirement with not being required if there is an openable window :ashamed1:

 

[kwired]

Does 1/2 bath only require 1/2 a fan?

 

[Sparks4All]

What contaminant sources are there in a bathroom? Are the normal things that a bath fan would vent actually contaminants?

Depends on what you ate. Haha

 

[tkb]

Does 1/2 bath only require 1/2 a fan?

No, just 1/2 speed. :lol:

 

[Coppersmith]

No, just 1/2 speed. :lol:

So half-fast then.

 

[david]

The IRC requires one to be vented outdoors. For "toilet rooms"

That's my bad. I was confusing the requirement with not being required if there is an openable window :ashamed1:

3 sg ft window half of witch opens or artificial light source and local
exhaust system


IRC 2015
303.3

Bathrooms:
"bathrooms,water closet compartments or other similar rooms"