26

Almost certainly a vent for plumbing. It connects to the sewer, so it doesn't need a cap. It's highly likely there's a sink or other fixture nearly below it.


10

It's a vent pipe for the plumbing it connects eventually to the sewer. It will catch a small amount of rain but the rain will stay inside the pipe and eventually reach the sewer. You're probably not supposed to put rain into the sewer but this pipe catches such a small amount of rain that nobody cares.


6

Sharing ducts in that way usually isn't allowed by code for health, comfort, energy efficiency, and fire reasons, among others. It's not a good idea, as you won't balance venting force without a diverter of some sort, and that means you have to constantly be switching it back and forth for the current need. You're almost guaranteed to forget at times, which ...


5

An extra 10 CFM won't hurt you at all.... If anything, it will get rid of the unwanted moisture faster. I'd wager that article was meant for much larger bathroom fans.


4

This is the classic "DC electronics guy thinking schematic. Here, you need to think wiring diagram due to NEC 300.3(B) and the eddy currents induced by AC EMF. So wiring routes must be a "tree" topology; no loops or bubbles. All wiring throws EMFs. For steady-state DC power, it's like a refrigerator magnet. Not for AC power; its constant ...


3

Electrostatic air filters are awesome I had a large set n my last house on the air handler intake. Even when we could not see the mountain across the street the air quality inside the house was excellent. I can say this as one of my granddaughters has severe asthma we normally leave the fan running 24/7 that system has a small make up air intake that enters ...


3

Yes, it is safe to seal the housing seams with silicone caulk. You aren't going to cause fire or electrical problems doing so (within reason). Use a fine tip and press it in firmly so as to not make a goopy mess of your appliance. However, I don't think this will accomplish your goal. If the unit is shaking around so much that it's squeaking and buzzing it ...


3

They already have that. It's the dominant system in use in North America... but I don't think you want it. The problem is, the pipes are enormous. - like 4" x 12" (100 x 300mm) per duct, with a dozen ducts. We joke, and call that thing a "duct-o-pus". That is why businesses have drop ceilings — to hide the monstrosity of ducts above. ...


3

I had this issue in an old office of mine which which was a room we subleased from an architect who apparently didn’t believe in air conditioning. As you have observed, single pipe portable AC units create negative pressure in a room because they use the conditioned air from the room to cool the condensing coil which is then expelled from the room. I ...


2

I can’t answer for the requirements in your country, but in the mainland United Kingdom, it is now a requirement to have a fixed mains powered ventilation fan in bathrooms and shower rooms regardless where these are in the building. This applies to new builds and in some cases, where renovation takes place. The whole reason for having a fan is to reduce the ...


2

You do not need roof vents for non-insulated open roof garages. FYI: For attics, the typical ratio is 1:150, so for every 150 sf of space then install 1 sf of venting. You have 576 sf so if you were to need them, you would need a minimum of 5.8 sf total.


2

I use Double Bubble Reflective Foil Insulation cut it to size as the vent cover , place over the hole and place the cover on top.. you can barely see it . No COLD AIR. And it’s reusable..YAS


2

Actually there is a better chance that it is a Radon discharge pipe roughed in at construction. That pipe is schedule 40 PVC. Nobody uses that pipe for sewer vents. Try to trace it down through the structure a d see where it goes.


2

A few days. Solvent will continue to escape the caulk from deeper in for a short while. After a week you probably won't detect it, but that depends on the nose.


2

A sealed plastic bag will not help. The spores that caused mold are literally everywhere. Unless you have a "clean room" to process the rags, you're not going to keep the spores out. The dilute bleach solution, however, is likely to be fruitful. You may want to experiment with the concentration of the bleach to find the most effective ratio.


2

Directing air from outside compressor into your attic would reduce the air flow from your compressor and probably decrease the cooling ability of it. A better solution would be to install an attic fan that vented to the outside. The problem with that is that you suck in humid air from the outside. If you've got good insulation on the attic floor why is the ...


2

Your plan to cut back the roof sheathing back 1" on either side of the ridge is the way it is done whether the roof is truss or conventional, framed with a ridge pole. I have seen formed aluminum ridge caps used over this cutout or the fiber mat that allows the regular shingles used for the caps to cover over the matting. The angle of the roof will ...


2

If you're trying to just remove latex paint, it might be better to try something more targeted at latex paint. That usually means less chemicals in the cocktail involved. There's a product called Krud Kutter, Latex Pain Remover that contains Acetone, and something called Dipropylene Glycol n-Propyl Ether. Googling the latter indicates there's some decent ...


2

Not exactly a paint stripper recommendation, but this might come in handy: Due to COVID they're a little bit more expensive, but still available. 3M 7502 mask is comfortable and easy to breathe through. What you need here is "Organic Vapor Cartridge" like 3M 6001 or similar. It is very effective at filtering out solvents and makes paint stripping, ...


1

Your problem , as you noted, pertains to moisture. Specifically, moisture laden air coming from the living space below via small gaps and cracks (ie. conduit and wire runs, vents and register openings cut to large, electric boxes and outlets openings cut wider than needed, window door openings not sealed around the rough opening, there's a few more I can't ...


1

Look for the periscope vents at your local home stores or online. This particular one's from Appliance Parts 365, which I have absolutely no ties to. End caps are also available at home stores too, next to the left handed screwdrivers.


1

I think you have a good handle on it. "If correct, is it a big issue if it is blocked/clogged?" Yes and no. If blocked, air will be drawn into the house through chimneys, bathroom/kitchen/dryer vents, leaky windows, etc. That air would be cold and uncomfortable. But not dangerous. It will eventually move to the furnace room. Clean that screen ...


1

Trivial, if somewhat annoying, to fix. Buy a chest freezer (unless you have one handy with empty space.) Put the wet, washed rags (bagged) in it. Several hours before you take them to be dried, take them out of the freezer to start thawing. You may need to experiment to find the right time. If you use one bag per day rather than one big bag you keep adding ...


1

I would suggest a solar powered vent that way when it is sunny or more heat load the solar powered vent(s) can do a better job at removing the excess heat. the first house I added a fan I used a standard 120v thermally activated fan it would kick in mid morning and cut out in the late evening it made a massive difference in that homes comfort but did cost a ...


1

There ate many different types of pipes, tubes, and ducts that you could use, but there's also a furniture solution. just use a folding room divider folded into a box shape. Seal around the base with draught-excluder saussages. if needed seal the seems with gaffer tape If you're on an extreme budget you could use an empty refrigerator box.


1

The easiest way to deal with this common issue is a vent booster fan, such as this example. It would not take up wall space nor be unsightly. Without more information, such as the size of the vent opening or mains voltage, it would be impossible to be more specific. A photo of the room and a closeup of the vent might be helpful. Browse HVAC suppliers, ...


1

Get your ear near to it, and ask someone to flush the toilet. if you hear sound of flush, then its what @Ack said in the comments (it prevents vacuum in your wastewater plumbing).


1

They are plumbing Exhaust pipes You need to leave the end open to allow the air to escape


1

I believe I see concrete, if a ground floor with concrete this may be your issue to know for sure tape a piece of plastic to the floor for 24 hours . When you pull the plastic up if it is wet you have found the source of the moisture. I have had good results using 2 part epoxy paint on concrete sealing damp concrete. I usually wait until summer when the ...


1

Two years ago I built a 6'x 3' kit type shed in my backyard and dealt with similar drainage issues. I would move the shed off the base and get rid of the plastic. Since the grade slopes away from the shed I would use metal landscape edging to set a perimeter to hold pavers. Level out the sand and use 12" x 12" pavers to build a base. You'll want the base ...


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