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The attic fan works with proper venting, Only an idiot would put an exhaust fan in a sealed room unexpected proper heat transfer

I watched this video when it was new. Probably the most underrated hvac video on TH-cam. I have tried on more than several occasions to make ice but have been unsuccessful. Good job.

It doesn't do that if you have plenty of intake vents

That thumbnail hurts my feelings. Somebody please cover up that excess gable vent around the fan 😢...

Hi. Just seen this video and have a question. Does the hole in the side of the needle have any adverse effect on the reading?

I dont understand. If the air from the living room is sucked out, then why not just make more air intake int he living room from outside air? Isnt it a natural ventilation system is it?

Hey brother ….I know your a busy guy….if you find the time , could you put some links in the description to those fittings snd the pvc T , and plug …..also, put a link to that drill bit and sheath. thanks in advance…. (I am a beginner 😅 just trying to do things in the best way )

Of course if you're going to be fine with 75 degrees when it is only 92 degrees outside, this is enough. that is way too hot for me (70 degrees). we are usually around 100 and have a lot of days between 105 and 110. we currently have a brand new 4 ton heat pump system that is totally failing to cool our 2500 sf house built near sacramento in 2001. 78 degrees upstairs on 89 degree day.

maybe you need more hole side of the house

Give me a shout if you're around the area still.

this is a contradiction! How then, during vacuum, is the water to be removed from the system if it freezes? frozen water particles cannot escape from the system.

i was thinking off installing one right over my pulldown stairs that is in my garage(man cave) with no windows here in florida i do have vented soffits and a ridge vent already in place .Neil Comparetto do you think it will help pull some hotness out of my garage??

I’m standing in front of a set of 557s right now with a micron gauge doing the exact same thing. Fk.😂

Surely, powered attic ventilators 'blow' not suck?

*Well-made, delivered quickly, and easy to install with **Fastly.Cool** . I may be imagining it, but it seems quieter than the 14 year-old unit that I pulled out. Of course it was noisy at the end due to failed bearings, so hard to compare. :)*

Just vent the soffits problem solved.

I think if your AC system is in the attic then whatever you need to do to lower the attic temperature is it going to be beneficial that doesn’t mean negate Aiir sealing you’re attic. But you have to consider 140° attic provides a substantial heat load on a home and hvac system. There’s duct seepage insulation value radiant heat load and many other considerations. To simply show a smoke draft test and say this is why a fan is dumb is not a full thought.

No sir you suck. Before I installed my power attic fan all I had was 2 stupid whirls birds on my roof and soffit vents all along my house. Those stupid whirls birds didn't pull enough hot air out. It used to get 83 degrees in my living space with the ac cranking. I install a power fan and now the hottest it will get in my living space on 100 degree Houston weather is 80 degrees. 3 degrees makes a huge difference.

So you’d rather have heat go into the house then? What’s the difference? Seal the damn attic from the living space first, then the attic fan will make sense later.

Buddy looks like you’ve gots a problem the bests thing I ever did was getting a attic fan ,, my attic stays at about 108 instead of 160 ,,,,, you might want to check your statistics again

My micron gauge doesn't hold and only reaches 690 microns but still it wouldn't hold I tried it directly on my vacuum pump and it reaches 69 and fluctuates back to 179 doesn't stay one place what can cause this does anyone know tried what you did but still no solution

A year on the battery, what is that a hybrid energizer and nuclear fuel cell?

How to buy

I need carbon monoxide detector

I’m not sure if you meant Bryant or the sticker that was covered up?

Hi Neil, I'm trying to find a good flex duct brand that you've had experience with. I know all flex is not created equal (I'm mostly concerned from a durability/airtightness standpoint). Thanks!

43 dislikes from the people who don’t understand negative pressure smh

Awesome video, just passed my AMRT exam and learned about manometers. Do you have a suggestion on cooling a hot Oklahoma small home attic space? Small fan on one gable pulling and another fan on the other end exhausting?

Please get solar attic fan which has far lower wattage & power, most only 12V & 10-50 watts & it won’t suck the air out of the house. The house need seal good also. Electric 120V attic fan is too powerful, it will suck the cold air out of the house behind the hot 🥵 air in the attic.

So if the fan can draw air from the living space, doesn't that mean the hot air in the attic can push into the living space? Wouldn't it be better if the air in the attic was less hot?

That’s certainly an accurate statement unless you reverse and point it into the attic, then it blows!

Explain why

I think soffit vents can solve the problem

This is like saying, well a car's tire could become flat due to nails... car tires suck then... It's not wrong, but it's also not the complete picture. For instance, anecdotally we live in a very hot area, have sealed our house/attic connections and use a vent fan. It has dropped our power bills by as much as 30% during the hot months. (110 degrees + for multiple months.) Sure there are other and better long term solutions. TL:DR say "vent fans suck" is not accurate, saying "attic to living spaces need to be sealed" is much more accurate.

Hey Neil question? I have a detached garage that I put all Sheetrock in and insulation walls and ceilings also I have a window ac unit. No gable vents or soffits installed (only 2 roof vents. What can I do will it rune my sheetrock or walls ceiling ?

would there be a vacuum in the attic if there was a gable fan at one end and a gable inlet of equal size at the other end of the attic?

Just when you think you got it all figured out? It happens to the best of us!

Thanks for the video, Man. I'm about to seal and insulate our attic, and every bit of information helps. Where could we purchase that 2 part foam system or something similar to it. I've seen some online, But they mention only being able to cover " 16 board ft". That sure seems like a bit of money , for very little foam.

Just installed a gable attic fan in the house today. I think its a case by case situation, as we have tons of tree cover and don't really notice the heat inside the house until its dark and cooling off outside (old house 2x3 walls). I plan on putting a supply and return within line sight of each other and running them for a short period of time on a switch from within house.

Can you install Mitsubishi ducted mini splits like this too?

REALLY, man it took u that long to say that it was the coupler!

One minute video and you're showing walls. What about the Fujitzu system?

I recently installed an old heatpump that was stored outside for a couple years. Vacuumed and filled with nitrogen probably 6 or 7 times over the course of 2 days to get below 500. Probably 10 or so hours total vacuum time.

Hi can you plz tell me the capacity of pump you use

So explain please. So the fan is bad?

Waiting for the follow up on the cooling side !

Nice job bro. Better to have a few good comments. Better than 1000 trolls

Is there a way to test pressure but not have that red hose causing that big gap in the pull down ladder? Doesn't that throw off the reading?

Put one on one end pulling in and one on the other side pushing out, run them on the same switch, stupid.