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Joined on January 27, 2011

Last Post on August 30, 2014

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@ May 19, 2012 10:58 AM in trouble with a new system

tell you contractor to install flow meters on those 2 loops and monitor flow conditions.


@ May 19, 2012 8:23 AM in trouble with a new system


2 zones shut down

@ May 18, 2012 9:43 PM in trouble with a new system

could you describe where those 2 problematic zones located in the house ?


@ May 18, 2012 9:41 AM in replacing heating distribution pipes with pex

In my opinion, if you went with atmospheric standard efficiency boiler, do primary/secondary piping, on system side install variably frequency drive pump in auto mode, install TRV, on all radiators, you can pipe radiators with manifolds or any way you want but if in series use bypass line with properly sized piping, install outdoor reset controlled valve on boiler side, outdoor reset system sensor install at system pump discharge. you will use boiler as a buffer tank as well in this configuration. do not use zone valves or thermostats in this configuration, or install 1 thermostat in coldest room, but you must not install TRV on radiators in this room. And using 1/2 pex the way you described is a very bad idea. you have to find a professional , not a handyman to do your heating system.


@ May 18, 2012 12:57 AM in Hot water baseboard heat

I do not think ceiling fans are good idea. By forcing hot air down you disrupt convection and will not able to heat the space. You need colder air to go down and hot air to go up by itself.


@ May 18, 2012 12:46 AM in Review by "experts"

My 5 cents on issue of qualifications of heating specialists, is that this profession requires a good level of knowledge in combustion, hydronic, electric and electric controls and so on. The one must be sharp and capable of thinking. Combined with low pay level and low acceptance in the society , this profession does not attract smart and sharp people. And also this person must be capable to come out of the bed at 2 am winter night to go and service the boiler. Seems it is too demanding job. smart kids go to college and then easy make 120K a year sitting 8 hours a day at some lehman brothers office, Why bother.

system cleaning

@ May 17, 2012 8:58 AM in Cleaning water boiler system before installing condensing gas boiler

for initial cleaning sentinel x400, for conditioning sentinel x100, disconnect old boiler first.


@ May 15, 2012 2:11 PM in Treasurer-Condo Assoc

It really does not matter what system better. Here in NYC, all what matters is initial cost of the job. Whoever gives lowest bid gets the job. Savings? Who cares, just give me new boiler. Cheap.

NY steam

@ May 15, 2012 1:56 PM in Treasurer-Condo Assoc

Their minimum charge $1500 per month.

copper baseboard

@ May 13, 2012 5:19 PM in gas boilers, which would you pick?

what material of radiator has to do with boiler efficiency?


@ May 13, 2012 1:25 PM in gas boilers, which would you pick?

this is the wrong question to ask. the right question is "how can i pick right installer?" good installer will give you few options to choose from, Regarding baseboars, they are just fine for condensing boilers as anything else. This is my opinion. The issue is amount of radiation in relationship to heat load. all houses are overradiated, as contractors tend to install excessive radiation, compared to design, and when baseboards designed for design outdoor temperature, these  conditions happen few days a year,  80% of time in the winter load is about 50% and less than design load, and it allows for lower water temperatures.


@ May 12, 2012 7:10 PM in boiler feed on or off?

if we build heating system from scratch, we do 2 tests, 1 air test 100psi 2 hrs, then water test 100 psi for 4 hrs. then we leave feeder on. in finished basements or in apartments we offer watts water detection shutoff as an option for additional fee.

boiler sizing

@ May 12, 2012 6:39 PM in Using an indirect HW with smaller boiler

In my opinion, indirect tank gives an excellent option to size boiler to heat load not to hot water. then tank sizing depends on domestic hot water requirements and nessesary recovery rate. I tend to increase tank size , not the boiler size if there higher hot water demand. It is especially actual when house is attached on both sides. Then heating load is much less than hot water load, and increasing boiler size will decrease overall system efficiency.


@ May 12, 2012 1:59 PM in Copper to steel/iron in a closed loop system

in this particular case somebosy installed galvanized nipple between copper adapter and stainless steel tank. we replaced it with brass nipples and it will last as long as tank will. 


@ 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.

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


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.


@ 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.
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