2 boiler madness

[wertert]

Hi All

Had a google and can't find an answer.

I've got a house with 2 boilers. Stupid but true.

Any ideas how I can monitor the amount of gas used by each boiler ?

Obviously I've got my main meter from which I take regular reading but that's it.

I'm thinking some kind of mini-meter installed in front of one of the boilers to give me an individual counter. Not sure if this even exists....

Any ideas ?

Thanks

 

[wertert]

how about.

switch off boiler A for 24 hours and monitor gas used on main meter.
switch A back on
swithc off boiler B for 24 hours and monitor gas used on main meter.
switch B back on

Ignore children and wife complaining about lack of heat and water.

 

[Onetap]

If they're not modulating boilers, then fit hours run meters. Each boiler uses a known amount of gas per minute whilst running, which you can measure at the gas meter.

If they're modulating, ignore this.

 

[dcawkwell]

There may be good reasons for this.
Advise what sort of boilers they are and what their function is in the house.

 

[OLLIE20]

Don't see what's stupid about it, some houses have 3, 4 even more

 

[wertert]

There may be good reasons for this.
Advise what sort of boilers they are and what their function is in the house.

Hi All.

Sorry for the slow response - been away.

Top Boiler (2006) is an ideal icos HE24. It covers the top 2 floors of the house. 5 bedrooms 3 bathrooms. 3 x 120L? hot water tanks.

//media.diynot.com/50000_49582_44256_55085471_thumb.jpg

Bottom Boiler is Worcester (2009) Greenstar 30CDi. It covers the bottom 2 floors. 2 bathrooms & kitchen. 1 x 270L hot water tank. Provides heat to Uponor UFH manifold.

Not sure if they're modulating....

Interesting in the comments about 3-4 boilers in a house. I have always assumed that running two small boilers costs more in gas then 1 larger boiler. Is this not strictly true ?

Untitled

• wertert
• 26 Mar 2012
• 1

 

[dcawkwell]

seems reasonable.
Big house with big water demand = big gas bill.

 

[croydoncorgi]

Total heat available is too much for the building as a whole. The lower-floors boiler is definitely too big. But overall, taking account of the benefit of not having to run long primaries top to bottom of the building, not too bad a design.

The main upside is that if one boiler goes down, then you've still got heating and hot water in half the house.

 

[doitall]

If it's designed and installed properly, several small boilers is much more efficient than one large one.