N6CRV said:Is this something new, vents in sleeping areas? Our house was built in around the 1860's or so. There is no heat upstairs except for the vents in the ceilings. They look to have been built in when the house was built. The only other heat is from the furnace brick chimney running up thru the hallway and one of the bedrooms.
Don
Yes, it is somewhat new... The hazards that I've mentioned have always been present - but used to be we didn't know as much about them, and didn't have much in the way of alternatives. Codes and such are moving targets that get updated as hazards are recognized and alternatives found. One that Elk himself has some responsibility for is a requirement that new HVAC systems have a tie in to the now required CO / Smoke detectors, such that if the alarm goes off, the HVAC fan is shut down - again theory is to reduce spread of fire / smoke.
Changes in codes mostly get applied two ways - new construction must comply, and generally you aren't allowed to do retrofits in old construction that makes it less compliant. Generally existing structures are "grandfathered" and aren't required to comply, except possibly when the change is relatively low cost and non intrusive, such as the recent Mass. requirement to put smoke detectors in all homes that have fuel burning appliances in them.
Gooserider