Things I wish I'd known before new windows went in

- Dust is a nightmare with window installs, no matter how careful you are. Even plastic sheeting and blue tape don’t seal everything.
- I’ve seen folks run air scrubbers, but honestly, unless you’re sealing off with zip walls and negative air, some dust always escapes.
- Filters clog up fast - changing them twice in a month is about right. Surprised me the first time too.
- Pro cleaners can help, but they’re not cheap. Sometimes it’s just elbow grease and patience.
- Did anyone try running the HVAC fan only during install to catch more dust, or does that just spread it around?

Running the HVAC fan during a window install is kind of a toss-up, honestly. I get why people try it - idea being the filter catches more dust - but in my experience, it usually just pulls that fine dust deeper into your system. Then you’re dealing with dirty ducts and a filter that’s toast in no time. I’ve seen folks end up with dust blowing out of every vent for weeks after. Not fun.

Plastic sheeting and blue tape do help a bit, but yeah, there’s always that thin layer of grit everywhere no matter how careful you are. I’ve tried those zipper wall things too. They’re better than nothing, but unless you go full containment like on a big reno job, some dust escapes.

I tell people to budget for a couple extra deep cleans and just expect to swap filters more than usual. And if you’ve got pets or allergies, double that effort. Honestly, it’s just one of those messy jobs that’s hard to make perfect, no matter what tricks you try.

Then you’re dealing with dirty ducts and a filter that’s toast in no time.

Couldn’t agree more. I’ve actually had a customer call me back a month after their window job because “something smelled off” every time the air kicked on - turns out their filter was caked solid and dust was everywhere in the returns. I get the logic behind running the fan, but honestly, it just seems to make cleanup harder in the long run. You’re better off just shutting it down and living with a little dust on the furniture instead of breathing it for weeks.

That’s a really solid point about the filter getting overloaded. I’ve always wondered if running the fan during construction actually helps, or just spreads the mess around more. Maybe it’s worth investing in a couple of cheap vent filters for those rooms being worked on? I get wanting to keep dust off stuff, but breathing it in is way worse.

I had the same debate with myself during our window install last spring. I ended up taping off the vents in the rooms getting new windows because I was worried the dust would just get sucked into the system and blown everywhere else. It definitely helped keep the mess a little more contained, but I still found fine dust on random surfaces days later.

The cheap vent filters are a good call, though - I wish I’d thought of that. I just used painter’s plastic and blue tape, which worked okay but wasn’t perfect. One thing I did do was run a box fan in the window facing outward, to try and pull air (and dust) out instead of letting it circulate inside.

Did anyone here actually leave their HVAC running during construction? I’ve always wondered if it’s better to keep air moving or just shut everything down until the work is done.

When we did our windows, I actually shut the HVAC off completely. I figured any airflow would just circulate dust and end up clogging the filter or coating the ducts. Still, dust managed to sneak into rooms I didn’t expect - guess there’s no perfect seal. Afterward, I swapped in a fresh furnace filter and vacuumed out a few registers just to be safe. The box fan idea’s solid, though... wish I’d tried that too. I’ve heard some folks run their systems on low with high-MERV filters, but honestly, I didn’t want to risk it.

Still, dust managed to sneak into rooms I didn’t expect - guess there’s no perfect seal.

Honestly, I actually lean the other way - running the HVAC on low with a high-MERV filter can help capture a lot of the dust as it’s stirred up. Shutting everything off just lets dust settle wherever it wants, and it’s tough to get out of carpet or fabrics later. I get not wanting to risk the system, but if you swap in a cheap filter for demo and construction days, you’re not really risking your main setup. Just my two cents from a few remodels - those filters are way cheaper than duct cleaning.

Shutting everything off just lets dust settle wherever it wants, and it’s tough to get out of carpet or fabrics later.

Totally get where you’re coming from. I tried the “seal it all up and shut down HVAC” method during our last window swap, but it just meant I was vacuuming dust out of every nook for weeks. Swapping in a cheap filter like you said makes sense - those things are way easier to toss than dealing with a whole duct cleaning bill.

- Tried the “everything off, doors sealed” thing too - honestly felt like I was trapping dust inside with me.
- Ended up spending more time cleaning baseboards and couch cushions than if I’d just let the HVAC run with a cheap filter.
- Not saying it’s perfect, but at least the filter catches some of the junk before it settles everywhere.
- Only downside: remembering to swap out that gross filter after. Missed it once…let’s just say, never again.

That filter swap is always the thing, isn’t it? People forget how much junk those things pull out of the air, especially after a big project like new windows. I’ve seen folks try the “seal everything” approach and end up with just as much dust - sometimes more, since it has nowhere to go. Running the HVAC with a decent filter does help, even if it means dealing with a gross filter after. At least you only have to clean that one thing instead of every surface in the house.

Funny you mention the “seal everything” method - I tried taping off the doorways and vents, but the dust still found its way in. Ended up swapping the HVAC filter twice in a week. I’d say, if you’re about to do windows or anything messy, just plan for an extra filter or two. Has anyone tried those reusable filters? I’m curious if they’re actually worth it or just more hassle.

I actually tried a reusable filter when we moved in, thinking it’d save money long-term. Honestly, cleaning it was more annoying than I expected - dust clings to the frame and you still get a cloud when you rinse it. Not sure it actually caught as much as the disposable ones, either. Maybe just me, but I went back to the regular kind after a few months...

- Interesting take. I’ve actually had the opposite experience with reusable filters in a few places.
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“cleaning it was more annoying than I expected - dust clings to the frame and you still get a cloud when you rinse it.”

That’s interesting about the filter types. I ran into something similar after we got our new windows - suddenly every bit of dust and pollen seemed way more noticeable, especially with the extra sunlight. I tried out one of those basic reusable mesh filters, thinking it’d be a win for both my wallet and the environment, but honestly, cleaning it was such a hassle. I’d end up with a mini dust storm in my backyard every time. I get your point about the vacuum trick, though. Maybe I was just too impatient.

I do like the idea of those hybrid filters you mentioned... never actually tried one, but it sounds like a decent compromise if you don’t want to toss out a whole filter every month. And yeah, remembering to clean them is half the battle - out of sight, out of mind until you realize your airflow’s gone kaput.

Anyway, it’s reassuring to hear others have had mixed results too. Sometimes it feels like everyone else has this stuff figured out except me.

I tried out one of those basic reusable mesh filters, thinking it’d be a win for both my wallet and the environment, but honestly, cleaning it was such a hassle. I’d end up with a mini dust storm in my backyard every time.

- Gotta say, I actually stuck with the mesh filter for a while. It’s a pain, yeah, but I started rinsing mine in the shower instead of outside. Way less drama (unless you count the clogged drain...).
- The hybrids sound cool, but for me, the “out of sight, out of mind” thing is even worse with those. At least with the mesh filter getting gross, I *see* it and remember to clean it before my allergies go nuts.
- Not sure if anyone else has this issue, but after the new windows, I swear the dust just finds new places to hide. Like, under the couch is now a pollen hotspot? Didn’t sign up for that.
- Honestly, sometimes I think the disposable filters are worth it just for the convenience - my patience for cleaning stuff is pretty low these days.

Guess there’s no perfect answer. Maybe the real trick is just picking your battles (and your filters).

I hear you on the dust finding new spots. After I swapped out my old windows, I thought things would get cleaner, but nope - just different. I’ve tried both mesh and disposables. Honestly, I got tired of the mess with the mesh filters pretty quick. Now I just grab a stack of disposables and swap them out every couple months. Not perfect, but at least it’s quick.

I’ve noticed that too - seems like the dust just finds sneakier places to hide after new windows go in. Have you ever tried those thicker “allergy” filters? I’m curious if they actually make a difference or just slow down the airflow.

I swapped out my regular filters for those thick allergy ones last winter, mostly because my kid’s got mild asthma and the dust after the window install was driving us nuts. Here’s what I noticed:

Step 1: Buy the right size. Seriously, measure twice. The thicker filters don’t squish in like the cheap ones.

Step 2: Install it and check your system. My furnace is older (70s split-level house) and when I first put the new filter in, the blower sounded like it was working a little harder. Not crazy, but noticeable.

Step 3: Keep an eye on dust. I didn’t see a miracle overnight, but after maybe a week or two, less dust was settling on the window sills. Still had to wipe stuff down, but not as often.

Step 4: Change it more often than you think. The packaging said three months, but mine was looking gross after about six weeks. Could be because of all the drywall dust and insulation bits from the window job.

Honestly, airflow did go down a bit, especially on the second floor - rooms farther from the furnace just felt a little less warm. Wasn’t a dealbreaker for us, but if your system’s already kind of weak, it might matter.

If you’ve got pets or allergies, I’d say it’s worth a shot for a couple months to see if you notice a difference. If your system’s newer, probably not as big a deal. Just don’t expect it to solve everything... dust still finds its way in somehow.

That’s a pretty spot-on summary of what happens with those high-MERV filters. I did the same thing after we remodeled - drywall dust everywhere, and my partner’s allergies were off the charts. You’re right about airflow; I measured the temperature difference between the first and second floor (I know, a bit obsessive) and it dropped by about 2-3 degrees upstairs once I put in the thicker filter. Not huge, but noticeable when it’s freezing outside.

One thing I’d add: if your furnace is older or wasn’t sized for high-resistance filters, you might want to check your blower motor specs. Some can handle the extra load, others really struggle and could overheat over time. I ended up swapping back to a slightly less restrictive filter after winter, just to give the system a break.

And yeah, dust is like glitter - no matter what you do, it turns up in places you’d swear you just cleaned.

And yeah, dust is like glitter - no matter what you do, it turns up in places you’d swear you just cleaned.

Ain’t that the truth. I’ve seen folks swap in those super high-MERV filters thinking they’ll solve all their problems, but sometimes it just stresses the system and doesn’t really get rid of the “glitter.” Curious - did you notice your blower getting noisier or running longer with the thicker filter? I’ve run into a few older units that started to sound like a jet engine after folks went too restrictive. Sometimes a mid-range filter and more frequent changes does the trick, especially after renos.