Chile Forum

patagoniax wrote:OK fellow engineers - new discussion.

I have built a separate,firewalled (internit and steel) sala de caldera for the boiler and termo. I am not disputing the need for a makeup/combustion air intake.

In the civilised countries, we generally use a single makeup air vent sized to the necessary rate of combustion of the burners inside the room. That makeup air is usually specified to be at a low point in the room and in some cases directly feeds the inlet air for the burner. Did I say a single inlet for a room of about 2,5 x 2,5 metres?

Well, here the rep for the gas company says there has to be makeup air venting top and bottom in the door. The door? The door is the only combustible part of walls and ceiling. Combustible door is permitted by SEC. Putting vents in a wooden door only assures that any fire that gets started will burn through that door much more quickly if it is the location of the makeup air venting.

Venting top AND bottom? No sense to me. A single vent, low mounted, of adequate sizing, should be adequate and meet SEC intent. That allows some desired heat to be retained in the room. I smell chamullo, a practice of we-always-done-it-this-way. Comments from those with SEC/persona autorizada experience?

zer0nz wrote: the airvent in the bottem of the sala de caldera, now i need to buy a new vent, but can not find one on the sodimac website, i think only because i cant get the name right in spanish!