Can’t tell you how many times I’ve seen “vented” fans just blowing into the attic. When we moved in, I found the kitchen hood doing the same—just recirculating. Ended up running new ductwork myself to the exterior. Did you run into any resistance from your builder or inspector when you brought it up? I got a lot of “that’s standard practice” pushback, which was frustrating.
Had a similar situation in our last place—bathroom fan just dumped everything into the attic, which baffled me. I asked the builder about venting it outside and got that same “industry standard” line. Ended up doing it myself after reading too many horror stories about moisture and mold. I don’t get why this is still so common, especially with how much we know about building science now. Sometimes feels like code is just lagging behind what actually makes sense for homeowners.
I get where you’re coming from, but I’ll play devil’s advocate for a sec—sometimes venting straight into the attic isn’t just laziness or ignorance. In colder climates, running a vent all the way outside can mean dealing with condensation in the ductwork, ice dams, or even critters sneaking in if the termination isn’t done right. I’ve seen a few cases where a poorly insulated vent pipe actually caused more headaches than just dumping into the attic (not that I’m saying that’s ideal either).
That said, I totally agree that just leaving it in the attic is asking for trouble long-term. Mold, rot, you name it. But I do think some builders are just following code to the letter because it’s what they’re used to, not because they don’t care. Codes can be slow to catch up, and sometimes they don’t account for regional quirks or newer materials.
If you’re handy and willing to do the work, running it outside with proper insulation is definitely the way to go. Just gotta watch out for those little details that can trip you up down the line...
If you’re handy and willing to do the work, running it outside with proper insulation is definitely the way to go. Just gotta watch out for those little details that can trip you up down the line...
Yeah, totally agree—those “little details” are what get overlooked. I learned the hard way that even a small gap in the insulation around the vent pipe can cause condensation to drip back into the attic. Ended up with a soggy patch of insulation and a musty smell before I caught it. Also, using a proper vent cap with a damper helps keep critters out and stops cold air from blowing back in. It’s not just about following code—it’s about thinking through how it’ll actually perform over time.
- Fully agree on the insulation gaps—seen way too many attic issues from that exact thing.
- Another thing people miss: making sure the vent run is as short and straight as possible. Every extra bend just collects lint and moisture over time.
- I’ve had tenants call about “weird smells” that turned out to be blocked vents or critters nesting in uncapped pipes.
- Code’s a baseline, but honestly, thinking about long-term maintenance saves headaches (and money) down the road.
- One more: check that the vent cap is actually accessible for cleaning. Some builders bury them behind siding or under eaves... total pain when you need to clear a clog.