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Type: Posts; User: Xavier
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01-06-2012, 04:56 PM
Thread: Inline duct fan failure
by Xavier- Replies
- 10
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- 652
Flow vs Velocity
CVBees
In addition to your other issues, an “inline fan” REDUCES flow! ;) -
12-08-2011, 05:04 PM
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- 40
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- 1,466
Great Calculations Motoguy AKA "SWAG"
Yes Mr. Bill that is >1,200 sq ft per ton plus the basement!;)
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11-29-2011, 06:28 PM
Thread: Outside Combustion Air
by Xavier- Replies
- 27
- Views
- 1,492
What number do you want?
HVACRDEDIC
To be accurate:
In the case of fossil fuels burnt in air, the combustion temperature depends on all of the following:
• the heating value;
• the stoichiometric air to fuel ratio... -
11-29-2011, 08:37 AM
Thread: Outside Combustion Air
by Xavier- Replies
- 27
- Views
- 1,492
Industrial vs Residential applications
Hvacrmedic
I have read a lot about combustion air in the past 35 years, and have read your reference, however it appears that they are addressing “Industrial applications” not residential.
"... -
11-27-2011, 11:45 AM
Thread: Outside Combustion Air
by Xavier- Replies
- 27
- Views
- 1,492
"IAQ" Indoor Air "QUANTITY" (IAQQ)
Here is the formula I posted on 10/9/11:
“The chemical equation for burning natural gas is:
CH4 + 9.52 Air (O2 + N2) = CO2 + H2O + 7.43N2
(This does not include dilution/secondary air.)
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11-16-2011, 09:59 PM
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- 9
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- 963
air volume
I do not recommend by-pass humidifiers because they reduce air volume to the building by as much as 10%.
Get a powered one. A little noise but more conditioned air to the living space.:angel:
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10-09-2011, 06:31 PM
Thread: no combustion air for gas furnace
by Xavier- Replies
- 19
- Views
- 1,239
Chemistry Not Opinions
The chemical equation for burning natural gas is:
CH4 + 9.52 Air (O2 + N2) = CO2 + H2O + 7.43N2
(This does not include dilution/secondary air.)
X -
07-27-2011, 09:09 AM
Thread: 2nd story not cooling off
by Xavier- Replies
- 311
- Views
- 14,751
How many pounds of potatoes can you put in a 2 pound bag
Cherokee, when you have a minute could you answer my question if there are recessed lights in the second floor that lead to the attic, or if you have a whole house fan?
On the same line do you... -
07-25-2011, 06:17 PM
Thread: 2nd story not cooling off
by Xavier- Replies
- 311
- Views
- 14,751
In and Out
Shophound:“Which I can't discuss unless I consider the entire dynamic of the envelope and HVAC system. Which is what I'm doing. And which I now see in multiple story structures, return air location...
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07-24-2011, 08:23 PM
Thread: 2nd story not cooling off
by Xavier- Replies
- 311
- Views
- 14,751
Fact or Fiction
Lynn I agree with your statements, furthermore not many understand that the dirt gets PUSHED into a “vacuum cleaner!” Until this is understood this discussion will continue for another ten years!
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07-23-2011, 07:10 PM
Thread: 2nd story not cooling off
by Xavier- Replies
- 311
- Views
- 14,751
Path of least resistance
This post is getting way to deep for me and even my nemesis Carnak.
I think what you are attempting to explain is called the “Neutral Plane” of a building.
Second; what you are describing is... -
07-22-2011, 04:53 PM
Thread: 2nd story not cooling off
by Xavier- Replies
- 311
- Views
- 14,751
100 degrees F
Yesterday ambient temperature was 100 degrees F around 4:00 PM. Attic temperature 132 degrees F and in the Sun 114 F.
My system came on at 4:10 pm and ran continually until 7:25 PM (Confirming my... -
07-15-2011, 09:32 PM
Thread: 2nd story not cooling off
by Xavier- Replies
- 311
- Views
- 14,751
Do it Right!
Skizot, Please reread my statement
Quote:
Originally Posted by Xavier
I have stated for years that my HVAC system for my 3,500 sq. ft. two story home in full sun is 48,000 BTU’s for heating... -
07-13-2011, 09:37 AM
Thread: 2nd story not cooling off
by Xavier- Replies
- 311
- Views
- 14,751
Air in a Bottle!
First the great news, the part I designed for my Jag works great.
I also updated the alternator to a new design that I discussed with someone who builds and repairs them (Expert) and “we” came up... -
07-12-2011, 01:20 PM
Thread: 2nd story not cooling off
by Xavier- Replies
- 311
- Views
- 14,751
HVAC Return Design
Hi Brian, how have you been?
Today I am waiting for some custom parts that I designed for my Jag to be done by a tool and die shop, so I checked in on HVAC.
Thanks for carrying the “torch”... -
07-03-2011, 09:57 AM
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- 281
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- 6,927
Do it "ALL" right!
Hi Robin. I too miss my “nemesis”!
Can you please explain how changing CFM (besides running longer) on a system with a "TXV" will affect RH.
You know my position: 2 tons @ >500 CFM's for my... -
05-13-2011, 06:16 PM
Thread: Time to switch the returns for Fall.
by Xavier- Replies
- 446
- Views
- 23,975
Stay Cool
This year’s post is dedicated to my friend and adversary.
Time to open the upper returns and close the bottom ones.
I am sure he does not have to switch his returns because I know he has great... -
03-24-2011, 04:14 PM
Thread: Hot or Cold for Bypass Humidifier
by Xavier- Replies
- 14
- Views
- 1,163
Hot/Cold or NONE!
I use hot water and a clear drain line in my “powered” flow through humidifier with a ball valve to control water flow through.
Because I have reduced/eliminated uncontrolled air exchanges in my... -
12-24-2010, 10:14 AM
- Replies
- 17
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- 2,609
Merry Christmas to all.
Merry Christmas
I posted this explanation as my early Charismas present hoping this one would be understood and reduce everyone’s energy costs (my Christmas present to all).
Since no one has... -
11-01-2010, 08:05 PM
- Replies
- 17
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- 2,609
How airplanes fly
Xman, you apparently do not understand the effect of wind on Delta P. I guess by now you have heard of a blower door test? Look it up and report back here what the effect of wind against a house is...
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10-30-2010, 10:07 PM
- Replies
- 17
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- 2,609
Quality not QUANTITY
Let me address these last two posts.
First Bob 100% of what I posted was intended to explain how a home works and help the poster. The reference to my site was because I have received several... -
10-30-2010, 06:08 PM
- Replies
- 17
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- 2,609
Houses DO NOT make air--OPEN A WINDOW
The correct and only practical answer to your question is “OPEN A WINDOW!”
For over 30 years I have been explaining how a home works (PHYSICS) including 10 years on this site and it is still not... -
10-13-2010, 04:30 PM
Thread: Time to switch the returns for Fall.
by Xavier- Replies
- 446
- Views
- 23,975
Down for Winter, Up for Summer
naiga snruter wol dna hgih ruo hctiws ot emiT.
Note: It is encouraging to continue to see each year more and more posters understanding how a home works.
P.S. However, it would be nice... -
09-27-2010, 09:11 AM
- Replies
- 23
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- 2,830
New Technology
[QUOTE=energy_rater_La;7889511]TB
the program I work with was until recently administered by state goverment
I guess it still is, although in part federal goverment has come in also.
the .35 ach... -
07-07-2010, 08:19 PM
- Replies
- 202
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- 9,803
Quality or Quantity
First point:
Ton of air conditioning
by Robert Fogt (Guest) on 05/09/01 at 18:46:52
I found this information:
One ton of capacity equals 12,000 Btu/h
Second point: are you stating there is...
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