Thread: Get a roof extractor fan!

Just stand underneath and keep farting in its general direction and all will be well.

So, after six pages of physics and mechanical engineering have we a conclusion as to the best way to ventilate under-the-roof space in Thailand?

Originally Posted by DrAndy

Quote:
Originally Posted by buad hai
So, Bobcock, what's your opinion of the turban vents, then? Under what circumstances are they worthwhile installing?

Bud, you would have to ask Macha that as not many of us wear them

Boy, I'm getting old, aren't I? I notice that more and more I type homonyms instead of the word I wanted. Is that the sign of some sort of tumor or mental disorder?

Originally Posted by peterpan

On yer Bruce.

Well this topics almost done, Lucky dogs pissed off, because there are too many words with more than 5 letters in them so he doesn't understand most of it.

that is sad, poor old boy Luckydog

as for heat and ceilings, I have good roof insulation and vents at each end of my high roof. It works very well and there is no need for spinning silver uglies

in my house in the old city of CM, there is no insulation and the rooms just heat up and up, even with windows wide open.

^ Thats my conclusion to Dr A. I have tried to quantify some of the variables but not too much heat here lately.
Around 12 it was 30 Deg ambient.
31 deg inside the house.
Exterior Roof temp was 42 Deg and ceiling 34.
The minor transmission there was appeared to be radiated down through the ceiling, which is what you would expect.
When we get a hotter day will get some more temps.

Originally Posted by DrAndy

I have good roof insulation

Under the roof or over the ceiling?

If you look around at traditional Thai houses, they often have double roofs that let any heat escape. That is the best way to keep cool, plus a nice fan

Originally Posted by peterpan

When we get a hotter day will get some more temps.

I'll do the same. My roof just has that silver reflective paper under the roof tiles and vents in the soffits. Inside I usually get one or two degrees over ambient during the hotter days. I'm thinking of just putting passive vents in the gables.

Originally Posted by buad hai

Originally Posted by DrAndy

I have good roof insulation

Under the roof or over the ceiling?

yes, both at once

well, my ceiling is actually boarded to the roof struts, so I have high peaked rooms

the insulation is the silver rolled stuff (made by the Chang company) put onto the struts before the tiles. Even better would have been to clad the ceilings first, put in some fibreglass to fill the space, then the silver foil then the tiles.

Originally Posted by buad hai

Boy, I'm getting old, aren't I? I notice that more and more I type homonyms instead of the word I wanted. Is that the sign of some sort of tumor or mental disorder?

no, we all get those strange feelings now and then. Homonyms are just like us, so dont worry

Originally Posted by Norton

Would finish garden sooner if a certain individual was to come up and help with the design.

Gulp....

Originally Posted by buad hai

Gulp....

Yep..all the beer you can drink as well.

Originally Posted by DrAndy
Quote:
Originally Posted by buad hai
So, Bobcock, what's your opinion of the turban vents, then? Under what circumstances are they worthwhile installing?

Bud, you would have to ask Macha that as not many of us wear them

Can you put a spinning fan in a turban? Wouldn't the bloke's hair stand up?

Originally Posted by Bruce

Can you put a spinning fan in a turban? Wouldn't the bloke's hair stand up?

Common practice with the whirling dervish.

Does this explain levitation? It's solar-powered.

Again I am the dumb butt.

If we talk about the roof, and keeping the house cooler, that is cool...

Eureka! Designed a mini fan that fits on the top of a Motorcycle Helmet!
250bht each to TD members.......Sorry, only two per person.

WOT? "Oh ye of little faith"........

Would this be like a vertical takeoff ...hat?

This thread took a new relevance last night.
I was sitting at our usual drinking hole last night and the BBQ chicken man was setting up his newly purchased smoke hood.
Now this guy does good chicken and makes some real dosh from it, always a que of hungry customers but he was getting pissed off at the amount of smoke coming out his chicken grill.
It burns his eyes and he won't live to the normal chicken man retirement age. So he spent some of his wealth on a new stainless steel chicken grill hood.
Nice piece of work it was, length of his 1200 mm grill inverted V shape with a 50mm out let pipe on the top about 1 Mtr long. this was intended to duct the smoke away above his head.

Good so far, but when he fired up his Charcoal BBQ, almost nothing went up the spout, it all just spilled out the sides further exasperating the smoke problem. He had sort of forgotten that a 1200 mm BBQ pit is going to generate way more heat than you will ever get out of a puny 50mm Pipe and as the pipe was 1M long the friction losses meant that the heat and smoke found a far easier path than trying to go up a small pipe.
After an hour of struggling thru a haze of smoke he pushed the whole apparatus over onto the ground.
Life is tough as Chicken Man.

He needed a spinning fan on top!

Originally Posted by peterpan

This thread took a new relevance last night.
I was sitting at our usual drinking hole last night and the BBQ chicken man was setting up his newly purchased smoke hood.
Now this guy does good chicken and makes some real dosh from it, always a que of hungry customers but he was getting pissed off at the amount of smoke coming out his chicken grill.
It burns his eyes and he won't live to the normal chicken man retirement age. So he spent some of his wealth on a new stainless steel chicken grill hood.
Nice piece of work it was, length of his 1200 mm grill inverted V shape with a 50mm out let pipe on the top about 1 Mtr long. this was intended to duct the smoke away above his head.

Good so far, but when he fired up his Charcoal BBQ, almost nothing went up the spout, it all just spilled out the sides further exasperating the smoke problem. He had sort of forgotten that a 1200 mm BBQ pit is going to generate way more heat than you will ever get out of a puny 50mm Pipe and as the pipe was 1M long the friction losses meant that the heat and smoke found a far easier path than trying to go up a small pipe.
After an hour of struggling thru a haze of smoke he pushed the whole apparatus over onto the ground.
Life is tough as Chicken Man.

Shame for him they don't make 50mm roof extractor fans,

OK, after days of rain we have a nice, hot, sunny day here in Korat.

About half an hour ago I put sensor in the attic and another outdoors in the shade. Right now at 1:50 PM ambient is 32, indoors is also 32 and attic is 40 and rising.