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Mitch

Mitch

Joined on December 21, 2004

Last Post on June 7, 2010

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I agree..somewhat

@ June 7, 2010 1:50 PM in Hot water tank sizing, how big is needed?

I agree that the initial operation of the tank to heating temp (50- 100°F), meanining your 60,000 is accurate. But not required. Once the system has heated, you are no longer operating at a 50° delta T, more likely 20. so 20-25000 btu would be sufficient to maintain, and if the tank is set up at a higher temp with a mixing valve to temper it down, likely a smaller capacity tank will work fine.

60000 btu will heat eh slab faster, but a 15000 @ a higher temp and mixing valve should work fine so long as the system isn't started in January. Once heated, its a matter of maintaining the slab temp.

Mitch

try

@ September 11, 2009 12:10 PM in budget quick trac

Watts Subray..but just get headers, corner sweeps and alum rools / tape
I do not use the sleepers, 3/4" ply ripped on a table saw is cheaper, and works great. 2" space allows for expansion, and minimal noise.

look at

@ September 1, 2009 12:05 PM in Radiant snowmelt under wood deck

Wattsradiant C channel. Unlike extruded plates, the pex clips into place no trap for melted snow, use a A/C tubing insulation on the pex and channel to reduce loss and improve heat transfer.

[url=http://www.wattscanada.ca/pages/_products_details.asp?pid=4596&ref=1&keyword=c]http://www.wattscanada.ca/pages/_products_details.asp?pid=4596&ref=1&keyword=channel

add a thread

@ August 13, 2009 12:30 PM in Welcome!

tried to "add a thread" in the off topic and got 'Ooops..page doesn't seem to exist.

DOE faile energy audit....again

@ July 24, 2009 1:44 PM in any one do government work?

Seems simple enough..practice what you preach.. http://blogs.wsj.com/environmentalcapital/2009/07/23/energy-inefficiency-the-department-of-energy-fails-another-audit/

This was started a while back

@ July 20, 2009 12:02 PM in biggest loser - revisited

and I cannot access the original thread, so here is my update. down 18 pounds, and converted a lot to muscle. can actually bike 5 miles, and regularly walk 3-4.

and

@ July 6, 2009 8:07 AM in Questions you'd love to ask (Dan H.)

why do we drive on parkways, but park on driveways.. and what is gay apparel and how do you don it?

and

@ July 6, 2009 8:07 AM in Questions you'd love to ask (Dan H.)

> Why there 10 hot dog package for 8 hot dog bun
> package? Happy 4th to everyone!

why do we drive on parkways, but park on driveways.. and what is gay apparel and how do you don it?

Roy

@ June 24, 2009 9:07 AM in pool heat loss

I thank you sir...

Had it and can't find it

@ June 23, 2009 9:13 AM in pool heat loss

Can someone post the calculation for heat loss on a pool? It was here several times and I had it but cannot find it. Thanks

best teacher for not swearing

@ June 19, 2009 9:15 AM in Crude language (Dan H.)

is kids, I have seen 6 and 8 year olds drop the "f" bomb in a crowd, silence, and the parents mortified. I know though that the dad uses it often, so you reap what you sow.

@ June 1, 2009 9:15 AM in Can this be fixed?

Didi they change the circ when they replaced the boiler? What do you have for a circ? Small cartridge type? and you used to have a big honkin B&G or some similar I am thinking? All to often the installer replqces the existing pump with the one that comes with the new boiler. Remember many manufacturers provide A pump, but it may not be the RIGHT pump. Simialr site visits I have been on as a consultant have the same issue. You do not need a bigger boiler due to the water volume, but the right pump (which you had I am assuming) your heat loss is what you need to replace, a BTU is a BTU, its the distribution I am thinking is your problem. You have large diameter pipe ajd those lttle 15-42, or 007 pumps will NOT do it.

One word

@ May 14, 2009 3:55 PM in those !^#%$!#-* milwaukee

Hilti

assuming

@ May 14, 2009 3:53 PM in When chosing a Hot Air Furnance oil fired ,is the main concern C

that the it is installed correctly too, and the customer wants to drop thqt amount of scratch to completely convert his existing system to something that is not there...Not too likely these days

Many a time I comment on this

@ May 14, 2009 3:51 PM in When chosing a Hot Air Furnance oil fired ,is the main concern C

While CFM is not the main concern,(matching a unit to the heat loss is), It is one of the biggies. Noise is generally attributed to the air movement through the duct system. All too often installers replace on a like for like basis, not realizing that newer units have a lower temperature rise that results in a higher CFM. When you couple this fact to a duct system that was likely designed around a .2" ESP, and at the time of upgrade they add A/C changing the design requirements to a .5"ESP, you have a recipe for disaster. When matching the CFM, you may need a lower firing rate, however it is quite likely that that is not an issue as the original is way oversized and structural improvements make a smaller input unit desirable. If the existing unit is running, calculate the CFM using the formula CFM = output / (1.085 x delta T) If the unit predate AFUE, likely the listed output exceeds actual, and odds are that the original spec nozzle on the rating plate was reduced to eliminate short cycling... in which case use the nozzle size x 140,000 x.7. Modern AFUE rated units you can use the rated output of the unit. If you cannot fire the unit to measure delta T, then use the mid range number on the rating plate (ie if state 100-130, use 115) The important thing is that the CFM you determine is approximately what the customer is used to hearing, it is the velocity hea / she hears at the registers. Do it right and you will have an extremely satisfied customer.

My fave

@ May 14, 2009 9:38 AM in monday oxymoron...

is the wife's new hair dryer..says "do not use while bathing" Thank god, because I so TOTALLY forget that part when I am in the tub...

Blue flame bburners

@ May 7, 2009 1:46 PM in OIl burner question

Anyone here know of a residential blue flame oil burner? I heard Beckett and Riello have one, but I have never seen one or heard of an application. Any enlightenment to be had? Thanks Mitch

3 Generations

@ May 4, 2009 10:06 AM in American made products

I read once about the theory of 3 generations of millionaires. It has been noted as a pattern, a family that makes millionaire status by creating and miking his own company, only survives to the 3rd generation (unless you are insanely rich like the Gates, Fords, or similar) It goes like this.. Grandad starts a company, works long and hard, makes it so his kids can do well, Grandad's kids saw all the effort it took, and understand it when the inherit the business, and it continues, but the 3rd generation was born rich, only know rich and do not understand the sacrifices of grandpa, and end up losing most of it, or selling it to an outside interest to maintain the level of income they are used to. American (and Candian) workers are into the 3rd generation..my father started creating the middle class. I furthered that creation, but my kids do not recognize the sacrifices of generations to attain our current lifestyle. My friends 20 Y.O daughter moved out, and figured her FIRST house would be similar in size to her parents, and was shocked, SHOCKED I say to find out that the bank did not agree to her plans..(she is working various part time jobs to make ends meet while looking for the perfect career) She knows money enough having supported herself, but fully expected new car, 2000 sq ft house with a nice manicured lawn as her FIRST home, not an apartment, or a small house..she (and many other kids I know) expect to move out and assume the same level of living we ( and our parents) struggled for! The youth of today (not all certainly) expect to graduate, get a 75,000+ a year job, expense account, company car, cell, computer and a corner office... Ity is tragic.

the

@ April 22, 2009 2:32 PM in enginer jokes

optomist sees the glass 1/2 full, the pessimist 1/2 empty.. the engineer..the glass is 2x bigger than required.. (technicans dump the water, and fills it with beer)

Big unit

@ April 13, 2009 9:30 AM in Rudd Furnace Jet Engine

at 95% you have 95000 output..as some consults I do for these EXACT issues, it is generally that the unit is Too large for the application. at a 50 delta T (usual for a high) you need about 1750 CFM. keeping the optimal flow rates for noise issues in mind (700 fpm) a 5" round will carry 80 CFM, and 6" 100. you need 17-18 6" rounds or 20 5" in the supply system. a 100,000 will do about 7000 sq.ft of new construction here in Canada. How big is the house? Some things to consider... Mitch

you will

@ April 13, 2009 9:17 AM in furnace venting

need to add a high (90%+) efficiency furnace to the PVC and all will be well...

I just read your story in the Wholesaler

@ February 26, 2009 11:29 AM in WOW Dan

and ain't it the truth. I was justa called in on a similar situation. Water system, but similar. New boiler, massive bills, noise, cold house you name it. I did an independant review because the utility, installer, wholesaler all said..hey its the right size. Nothing wrong here must be the boiler.. My first step was to tell the owner I need to see the radiation, and whipped out my trusty tables and tape measure. He was flabergasted that I did not want the boiler..the boiler is the problem!! nobody touched the rads!! I explained that the boiler is part of a "SYSTEM" and I need to examine the "SYSTEM" for a proper audit. Well..the geniuses on this one put in a 200mbtuh boiler (based on the old one + some "insurance") for a home with about 43000 mbtuh of heating distribution capacity, replaced the "big honkin" pump as he put it with a TACO 007 to feed the old 2.5" pipes. no air purge, no protection, practically NOTHING in accordance with the IOM all this in an 1400 sq ft house..and there must be a defect in the boiler... yeah... right... There si a defect all right, and it was NOT the boiler..but the installer. Great story..love all your articles. Keep up the good work.
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