COMMUNITY FORUM

kalep227

07:55AM | 05/09/06
Member Since: 05/08/06
3 lifetime posts
Bvplumbing
I recently purchased a house with an older style tankless water heater, where the oil burner which heats the house also heats the water. When taking a shower the water either comes out hot intially and then cools down, or does not heat up (a lot). What is wrong and what can I do (other than get a new system)? Is this system really more efficient since the boiler needs to kick on all summer long?

thanks

Sylvan

07:27AM | 05/10/06
Member Since: 01/24/06
1449 lifetime posts
Me_office1
I personally do not think it cost effective to fire up an old oil or gas boiler that may possibly give you 60% efficiency to heat a few gallons of water going through a coil.

A lot of inept "heating folks" buy a boiler and never take into consideration the H/W fixture unit demand or even bother to install flow restrictions on the discharge side of the outlet piping of these coils to allow the coils to make up water faster then it can be with drawn.

Also some folks do not bother to adjust the aqua stat and then install a Holby or other type of quality tempering valve thus the coil cannot make up water as fast as it is with drawn.

They do have what the call the hot water maker and many oil heating contractors are familiar with this tank with a coil inside that is very effective in giving almost an unlimited supply of H/W and these tanks are treated as separate zone

The older coils and designs were not sized for the extra loads like dishwashers, showers, washing machines, hot tubs or Jacuzzi's and additions placed on a home as the families needs change.

You may also look into higher out put burners like a Becket which gives a much better flame using less fuel then a conventional type burner.

Also a lot has to do with the oil your being sold as not all #2 oil is the same as the BTU can vary from 138,000 - 140,000 BTUS per gallon.

Servicing of these boilers is very important and any build up of soot will rob you of several thousand dollars per year in lost stack temperature and poor heat transfer

kalep227

10:15AM | 05/10/06
Member Since: 05/08/06
3 lifetime posts
"this tank with a coil inside"

Is this a seperate tank that is added to my my existing system or is it a seperate "instantaneous" type system? In other words what can I do rather than installing a new burner, or new tankless system, or a tank?

thanks

Sylvan

10:24AM | 05/11/06
Member Since: 01/24/06
1449 lifetime posts
Me_office1
It is a line taken from either the tankless coil you now have Or from the condensate return line with an aqua stat and pump that calls for heat and this tank is piped into the existing system BUT a seperate tank capable of producing a lot more H/W

kalep227

10:42AM | 05/11/06
Member Since: 05/08/06
3 lifetime posts
Thanks for all your help, much appreciated

Sylvan

01:55PM | 05/13/06
Member Since: 01/24/06
1449 lifetime posts
Me_office1
Your very welcome. if you have qny more questions feel dree to e mail me.....
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