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gennady

gennady

Joined on January 27, 2011

Last Post on September 11, 2014

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Recent Posts

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TSP

@ May 11, 2012 11:00 PM in Copper to steel/iron in a closed loop system

No, i v never used TSP and do not have opinion on that matter.
Cheers

better picture

@ May 11, 2012 10:50 PM in Copper to steel/iron in a closed loop system

el corrosion

evidence of corrosion

@ May 11, 2012 10:46 PM in Copper to steel/iron in a closed loop system

Sure i'v seen it . It really does not matter if system closed or open, because this is electro-chemical nature of corrosion, not presence of oxygen, i m posting picture of corrosion of job, done by another contractor 5 years ago.

steam to FHW conversions

@ May 10, 2012 7:29 PM in Treasurer-Condo Assoc

i had done steam to FHW conversions, and savings were considerable, ( up to 80% fuel cost reductions) but of cause those steam systems were shot. Then again, restore steam system ( I done that too) also not a cheap thing. I got excellent results with TXV control  and proper sizing of steam  boiler and savings were unbelievable as well. The trick is in the contractor, not a system. Real professional can fix and set up any system and make it efficient, knucklehead can screw up any system

.

@ May 10, 2012 6:44 PM in Copper to steel/iron in a closed loop system

duplicate

ferrous to non ferrous connections

@ May 10, 2012 6:44 PM in Copper to steel/iron in a closed loop system

all ferrous to non ferrous connections must be done with brass fitting or brass nipple or brass valve  and so on (always brass). Do not use dielectric unions, they are always leaking.
Using teflon as an insulator is a bad idea, because tread connection in a sense is welded connection, and joint seals when metal is pressed against metal with such a force than molecules diffusion starts to take place between joining surfaces. This is a reason why pro dope is the best pipe dope, it consists from oil (lubrication) and abrasive ( cleaning unevenness of surfaces to allow metals better contacting each other)

Wanted to go with something with long term reliability

@ May 9, 2012 7:37 PM in Help sizing new gas boiler

If you need something with long term reliability, why not consider wooden stove? Just kidding. It is 2012 today.

venting

@ May 6, 2012 9:27 PM in Help sizing new gas boiler

many high efficiency boiler have a vent kits installed in chimney and allowing for venting trough the existing chimney, and  no ss lining required. as per water quality, your heating system circulates same water, being treated with water conditioner like sentinel x100, it becomes completely harmless. Don't fall for 50 year old technology.

i am considering saving the money and just putting the gun on our current boiler.

@ May 6, 2012 9:20 PM in gas gun on existing oil burner or new gas boiler

Here we go again. This is not saving money. What you are going to do is just waste your money. Installing high efficiency system in your house is the best investment you can make.  Improving your house comfort and   lowering your bills is what you have to invest in. Think investment. And find sane, qualified contractor. Those large over sized cast iron radiators will allow for lower water temperature, and low velocity low resistance, very effective heating. your arrangement is ideal for high efficiency heating.

viessmann

@ May 6, 2012 7:35 PM in Help sizing new gas boiler

Yes  i was there.

new boiler

@ May 6, 2012 7:19 PM in Help sizing new gas boiler

why not 90+% efficiency boiler?

deleted

@ May 6, 2012 12:43 PM in Why Is the US Always Last

mini ducts

@ April 29, 2012 12:09 PM in Replace steam radiator system with high-velocity mini duct?

Mini ducts high velocity in my opinion is not an option at all. Installing properly sized steam boiler along with properly insulated, vented and controlled steam system, is the most economical way. (look at one pipe steam system control valves from Danfos).
2nd option would be convert system to hydronic heat with mod con boiler, but it will be pretty expensive proposition.

pump

@ April 26, 2012 10:32 PM in circulators burning out frequently

if installer mounted cartridge type pumps vertically, and if there is spring loaded check valve on discharge, it traps air and can create situation with pump working with no flow.

servicemagic

@ April 24, 2012 9:33 PM in servicemagic

The most dreadful waste of money.

Viessmann

@ April 22, 2012 7:18 PM in best high eff. gas boiler/ hot water heater

Viessmann as a first choice, Slant Fin Bobcat with Combi Cat unit as a second (economy)

polaris

@ April 15, 2012 8:21 PM in Polaris used for radiant heating & domestic hot water.

Steve , you are absolutely right in my opinion. Also i think plate heat exchanger is needed not for heating, but for domestic hot water. slant fin combi cat is just right for the job. Has build in circulator, activated by DHW flow sensor.

https://docs.google.com/viewer?url=http%3A%2F%2Fwww.slantfin.com%2Fimages%2Fstories%2FProduct-Literature%2Fcatalogsheet_dhwg_10a_dhwg-10a.pdf

utility

@ April 14, 2012 9:57 PM in gas line size? and how to determine size.help tim plz

Yes, i was referring to the original post.

utilities

@ April 14, 2012 9:54 PM in gas line size? and how to determine size.help tim plz

In NYC utility can run service to house and install house gas valve. this is where their jurisdiction ends.

design

@ April 14, 2012 9:46 PM in Not always mod/con

How will they know what they are buying?

HDD

@ April 14, 2012 2:56 PM in Not always mod/con

To do proper comparison, heating degree day method will be more accurate

.

@ April 14, 2012 12:57 AM in Not always mod/con

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