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Re: Steam boiler replacement and hot water unit

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Posted by HeatPro on November 29, 2007 at 20:37:04:

In Reply to: Re: Steam boiler replacement and hot water unit posted by steve on November 29, 2007 at 14:24:24:

: How does the time lag and a feeder system factor into the steam system.
++ a feeder system is unnecessary in a properly-installed steam system. Feeding once per week manually avoids having solenoid valves turn feeders into sprinklers systems.

: I have always found steam to be warm and comfortable. Hot water in comparison always seems cold and then suddenly too hot.
++ Such a warm water system was controlled incorrectly. It is possible and preferable to have water heat constant at all times.

: I like the way the radiator just uses a small area of wall space without the baseboard running along entire walls.
++ Fine, use the radiators.

: I agree that $6000 heating a year is a lot. Isn't there some way to up the efficiency of the steam overall.
++ No, you can't get a non-condensing boiler over 87% AFUE, and the steam lines should be insulated already.
I mean for years boiler people have said a new boiler will be much cheaper to operate than the pre1920 one.
++ A new steam boiler will be about 85% AFUE no matter which. 1920 boilers were in the 40
% AFUE range.

: I have read that is is a bad idea to blow insulation into the old walls as it can create all sorts of problems.
++ Read another book and call an insulation pro.
Without insulation, I am not sure the savings would be as significant.
++ Correct. insulation is the big savings factor as it can cut the heat need to 1/3rd of an uninsulated house or more.

: It sounds like you support only a natural gas hot water conversion.
++ "The tank is a major concern of mine. Are there liners that can be sprayed into the tank or are the only options replacement or abandonment and then a new smaller tank? " All an expense and worry compared to gas piping
How does one go about getting that done properly when it is so hard to do a simple boiler replacement.
++ If it is that simple you'll be dong it in a few hours. If not, it would take your contractor some hours to explain it all without writing it.

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