I have no idea what that vent is but you could test it when the HVAC is running by holding something very light like a small strip of tissue paper close to it. If it’s intake it will be drawn in if exhaust it will blow out. If neither? Glad you are helping out:)

If I lived in Katy, Texas I would call on you for service. 👍 Thank you very much for the informative reply! Have a wonderful day 😊

Thank you too Mojavemaria 😊

If it's a jump duct, you should see a similar grill in the hallway or common area outside the bedroom. If you don't find one, then it's more likely to be a return that was installed on a retrofit basis because the home's occupants weren't comfortable (that would be my bet.) If it was installed on a call-back basis, omitting the filter was either to save expense to the HVAC contractor or because the yahoo didn't have a properly sized return grill on his truck and didn't want to make yet another trip.

Every bedroom should have a properly size return--not a jump duct. Jump ducts and transfer grills compromise privacy in a bedroom and so should be considered a last resort.

Jump ducts and transfer grills compromise privacy in a bedroom and so should be considered a last resort.

What about windows and door ways Charles?

What do those do to privacy?

Let's worry about jump ducts? ha, ha, ha.

Installing jump ducts may be common practice in your area, Ray, but that doesn't make them a best practice. They are clearly different from windows and doors, but those differences are apparently not obvious, so let's unpack that difficult-to-understand concept.

Transfer grills in bedrooms are essentially a hole in the wall with a grill on each side of living areas. They allow air to flow from the bedroom to adjacent living areas. Enhancing air flow in that manner facilitates sound migration, too. Sounds generated in a bedroom range from grandpa's snoring to episodes of marital bliss--all of which are better not shared with others.

Jump ducts are only marginally better than transfer grills in that they have a flex duct connecting the two living areas, but they're still less than ideal.

A dedicated return in each bedroom will keep occupants more comfortable and reduce the migration of sound compared with either a transfer grill or jump duct. They may not be as common, but I consider them to be a best practice.

Sounds generated in a bedroom range from grandpa's snoring to episodes of marital bliss--all of which are better not shared with others.

In 28 years of HVAC service calls I have never once been called about noises that people are making in a room due to jump ducts to from another room... Typically they're not installed room to room they are installed from room to transfer vent which is also unfiltered. So noises in one room isn't going to go thru a jump duct. Wishful thinking, to argue about something.

If you're standing at the door and can hear noises in the room, whose fault is that?

If you're on the other side of the wall and can hear noises thru the wall?

If you look at the picture Charles you will see the vent in question is in the far corner of the room.

I am called for noises that equipment is making. I am called because it's too hot in the room contributing to marital bliss.

Those rooms tend to not have jump ducts or filtered returns either one... OR the filter typically 12"X12" hasn't been changed in 20 years because they can't find a replacement.

A builder won't tell you these things. This isn't what they do.

Homeowners live with the shortcomings of a lot of poorly designed systems. Not getting service calls doesn't mean a system is well designed or performs well; it simply means they didn't request service.

Hopefully the information provided on transfer grills and jump ducts will prompt anyone building a custom home to get a professional review the design of the proposed HVAC system.

"Hopefully the information provided on transfer grills and jump ducts will prompt anyone building a custom home to get a professional review the design of the proposed HVAC system."

Where I come from builders are expected to make sure subs do the best job that fits homeowner's needs. Less than 1 in 250,000 homeowners have technical knowledge required to scope details. Is that an admission builders usually don't look out for their client's interests? It certainly sounds like it.

klem1,

I don't consider jump ducts to be a case of a builder not looking out for their clients' best interests. With information shared among potential clients at the speed of social media, that could make for a short building career. Rather, it's a case of the uninformed leading the even more uninformed.

In my experience, most builders don't know much about HVAC. Ditto for architects. Builders typically rely on the expertise of the HVAC contractor they select (and yes, that's often the low-bid guy.) Unfortunately, there are a lot of HVAC contractors whose knowledge is only marginally more than the builder's. As Adagia opined, "In the land of the blind, the one-eyed man is king."

Architects are more likely to hire a mechanical design firm to design the HVAC system, but the number of architect-designed custom homes built in the U.S each year is a small percentage of the total homes built. If a mechanical design firm isn't involved, homeowners will be well served to have a professional review the design of the HVAC system proposed for their home to ensure it is one which will meet their needs.

"Rather, it's a case of the uninformed leading the even more uninformed."

I realize it might sometimes seem the whole world has got that way but if one looks hard enough,there's corners in the world where everyone knows their job and try hard doing it to the best they can.

To be sure, there are competent folks in every field and still some who take pride in their work. In my experience, you need to look harder in some trades than others to find them. In residential construction, I've found HVAC to be the one where you need to look the hardest.

A privacy issue was not where I saw my question heading... lol just teasing ;) (No nookie sounds here. Maybe a gentle Hum from BOB.. )

Honestly I would not be surprised if this builder took shortcuts. The home is valued in 1/2 Mill range today. But the builder Fulton Homes left many 1/2 ass’d aspects in it. Now that I think on it.. the vent may have been installed in order to alleviate one bedroom that is ALWAYS much hotter in the AZ summer than the other rooms. I don’t see an additional vent out in the hallway. Just the main filtered intake. As for the privacy, that hasn’t been compromised. We all have our own little secure retreats. Just one person sweats a little more... 🙄.

But I want to extend a heartfelt appreciation for all the responses here. Thank you 🙏 When anyone today demonstrates personal integrity. More people need to acknowledge that individual. Let them KNOW it’s appreciated. Protect them from trolls, bad contractors, con artist’s etc when you see it happening. VALUE personal integrity!! I’m so glad my question evolved to shed light on an area most never know they need to “watch out for”.
That’s enough from my soapbox ;) But it certainly is a nice feeling to hear voices of the real professionals helping out this group. 🙏 ty! ❤️

tmountain,

To borrow a line, what a long strange trip it's been.

The absence of a similar grill and duct in the adjacent living area makes it clear that what you have isn't a jump duct, but a dedicated return duct sans air filter. It ought to have a proper return grill and replaceable filter.

As for whom to blame, the builder may have taken some short cuts, but if the return was added after move in, it's likely the builder sent the HVAC contractor back to address an issue with occupant comfort. It's not likely the builder provided any specific instructions for how to do so nor incurred any additional cost. In that case, the short cut was taken by the HVAC contractor, not the builder.

"It ought to have a proper return grill and replaceable filter."

CR Homes, maybe it isn't the most common approach where you are, but you probably know that some HVAC systems have just one air filter, at the return plenum where the air handler or furnace are located. In such cases, putting an additional filter at a return grill isn't necessary and may needlessly restrict airflow.

That is a curious-looking grill for a return duct. It appears to have moveable louvers but no damper lever. It makes me wonder if indeed it is a return. Mojave maria had a good suggestion - when the system is running, hold up a piece of tissue and see if it gets sucked against the grill or blown away.

As this is a family oldster's home, if the equipment cools and heats reasonably well, I'd probably leave it alone.

There are certainly options to filter the entire air flow of a system with a single filter at the air handler. I had that in my former home on each of two different systems. The downside to that is the potential accumulation of dust inside return ductwork which can be difficult to clean and can become food for mold/mildew. I infer from the OP's post that this home has filters at each return and that this is the only one lacks a filter.

The louvers on the return grill shown are fixed and the OP can't feel air flow. It's a pretty safe bet that it's a return. It's also a pretty safe bet that it was retrofit because the occupants weren't comfortable and was done at minimal cost. It isn't a big job to swap it out for a proper return grill with a filter. That's what I would do.