I need to seek some net widom on a question a friend of mine asked me
tonight.

My friend had a new boiler (hot water heat system) installed and the
installers told him that he needed to have a "mechanical door"
installed on his utility room if there are bedrooms in the basement
(and there are).

What exactly is meant by a "mechanical door"? My friend thought this
implied a door with a closer attached to it but I've never seen a
residential utility room door with a closer. The original boiler (60
years old!) had to be replaced due to failure of some internal parts
which resulted in a CO problem in the house (thankfully he had
detectors.) I wonder if this "mechanical door" is being suggested as a
stop gap measure for future CO issues but that doesn't seem likely
because even the gap at the bottom of the door would not seal CO.

The house is in Ft. Collins CO.

I'd like to just get some net wisdom on the subject I can share with
my friend.

Next steps lacking any feedback will be to probe the HVAC installers
for more detail and/or call the city building inspector for more
insight. I assume a permit was pulled for this job and if so shouldn't
the installer finish the job to meet any inspection?

Thanks for any insight.


John Keith