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gennady

gennady

Joined on January 27, 2011

Last Post on July 30, 2014

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Try this

@ May 18, 2014 7:24 AM in Pricing New work

http://www.barebonesbiz.com/catalog/how-much-should-i-charge/

Cover up

@ May 17, 2014 3:28 PM in Plumbing Signoff assistance Needed

Plumber will lose licence for cover up. It is a big no no. Plumbing work must be done under direct and continuous supervision of master plumber. All people doing plumbing work must be directly employed by licensed plumber.

2 ways

@ May 13, 2014 11:18 PM in Favorite Mod Con.

I would offer them TRVs. Or as alternative just pipe p/s existing boiler with odr controller to control mixed water temperature to system. Just implement the minimum return temperature entering boiler to prevent condensation.

young people in trade

@ May 9, 2014 11:39 AM in So far behind......

I do not see young capable people in the trade as well. And find a good technician. Good luck. This is the situation where education system failed work place.

Radiant ceiling

@ May 8, 2014 9:33 PM in Heat Loss discrepancy

Radiant heating conducts heat via heat waves, transmitting heat from hot surface to cooler surface directly, without heating air. convection heating happens via air circulating between transmitter of the heat and receiver of the heat. So in radiant heat to be comfortable there is no need to heat and move all air in the room. Ceiling radiant is nice, but sitting at the table feet will be pretty cold. Shade, you know. Just my 2 cents.

heat loss

@ May 8, 2014 1:00 PM in Heat Loss discrepancy

radiant heat loss is quite different from convection. The boiler size required for radiant heating system is at least 30-35% less than a conventional heating system. This is because the way the heating is distributed from floor to ceiling is different with one vs the other. Radiant heat has hotter temperature at floor and coldest at the ceiling, while convection is reversed. With convection radiators the coolest temperature is at the floor and hottest at the ceiling. Also feeling of the comfort with radiant heat is around 67-68F while with convection its around 72-73F. Personally I installed 135,000 input boiler for 7800 SF house, and this winter with 6F outdoor temperature they were comfortable.

Delta t

@ April 13, 2014 8:59 AM in Multicirculator/Multizone

I would calculate loads for each zone, measure radiation, and decrease flow via increasing delta t. Usually radiation is oversized so you can go to delta t over 40-50F. Then balance zone to calculated delta T. It worked for me.

Venting

@ April 12, 2014 9:29 AM in Burnham Alpine

You can do it with boilers, just pipe within the chimney must be supported every 5 feet.

alpine 210

@ April 11, 2014 10:09 AM in Burnham Alpine

is it multi family building? 210.00btuhr?

Car analogy

@ April 9, 2014 10:14 PM in Mid range boilers

Boiler is just a part of system, so you comparing not cars but engines. What 2L engine is better, Audi or WW? I guess not much of a difference. What about the rest? You mention 2 zones. I guess , correct me if I wrong, you will be using 2 thermostats to stop and start flow trough the zones?

Midrange

@ April 9, 2014 9:09 AM in Mid range boilers

Midrange in what sense?

Steam vs hydronic

@ April 6, 2014 2:13 PM in Value of converting oil/steam to modcon gas?

If you have a steam system, you can have comfort and savings comparable to mod con hydronic. It is all about contractor not an equipment. Unqualified contractor will ruin any type of system, good contractor will make any system run well.

bad apple

@ March 14, 2014 1:34 PM in General steam trap question

The bad trap, failed in open position will turn off nearby traps and cause them to fail. It is like a bad apple.

another one

@ March 14, 2014 1:01 PM in Mod/Con Heat Exchanger Designs

you forgot to look at Inox-Radial heat exchanger

Correction

@ March 2, 2014 10:42 PM in New Gas Conversion

In order for boiler to condense you do not need water temperature below 130. Boiler can condense at 160F return water temperature. Also, when using outdoor reset, water supply temperature usually around 160F at average long island winter outdoor temperature.

Ocs

@ February 10, 2014 7:59 PM in CAST IRON RADIATORS

Anthony is a great guy and they sell first class product.

piping

@ January 26, 2014 9:49 PM in does this system look right?

This system is piped completely wrong.
-no point of no pressure change.
- boilers are piped in a way that their pumps are pumping into itself. i do not see system pumps
- differential pressure bypass is in wrong place.
and so on

whole thing looks like a joke

Heater

@ January 26, 2014 1:29 PM in rinnai hot water help

Sorry , I misread your question.

water heater

@ January 26, 2014 10:00 AM in rinnai hot water help

Water heaters are not boilers. They cannot be used as a boiler, Ask original installer to install real boiler.

piping

@ January 26, 2014 9:40 AM in Converting a 2 pipe radiator system to a 1 pipe or staying with 2 pipe- Any thoughts

I would definitely not recommend monoflo. No way. I would organize system into type of load, high temperature, medium temperature and low temperature, and pipe them with primary secondary, high first and low temperature last on the flow. I would do separate outdoor resets for each load. Also, you mention on measuring radiators to determine load. How do you know those radiators are sized properly? What was the name and qualifications of the person who designed and installed them? Just do proper heat loss and remember radiant system produce lower air temperature and generally requires probably 30% less input than convection system.

savings projections

@ January 19, 2014 10:40 PM in Calculating savings with degree days

I usually under estimate savings. Real life savings sometimes surprise me as well. There are more factors affecting savings other then just HDD calculations. And those factors are really impossible to predict. Main factor is ability of the boiler to follow load without overshooting. Proper set up of PID, where access is available, becomes essential. Another factors in modulating condensing boilers is avoiding boiler stopping and short cycling. Just my 2 cents.

Savings

@ January 19, 2014 6:51 PM in Calculating savings with degree days

In my understanding properly sized boiler will run non stop at design degree hour. So having heat loss done and knowing how much BTU is lost at these conditions, I multiply total hours of degree day per year. I get these at http://www.degreedays.net , then I get fuel usage per year based on those numbers. Then i deduct hot water fuel usage from customer bills, and get annual savings with new equipment.
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