No Obvious Ventilation on Pool Boiler

[TerryWaite]

Hi all

I have just AR'd a Certikin MB 155 swimming pool boiler which was installed in a garage as I could see no ventilation openings direct to outside. The manufacturers instructions stated a minimum of 351cm2 high level ventilation and 702cm2 low level ventilation, I couldnt see any. There was no door louvres, the window had no vent or wasnt openable, there were no air bricks anywhere, and no penetrations through the pitched roof other than the flue.

Hiwever, it has been installed for 7 years, flue is pulling fine, apparently the last guy to come out and have a look at it said it didnt need any extra ventilation because of the height of the roof, there was plenty of air for the boiler. that didnt cut it for me, and I AR'd it. Opinions appreciated.

 

[PlumbBobBob]

was there not a gap around the garage door?

 

[TerryWaite]

didnt think that would suffice. Is that usually enough? And with the high and low level ventilation, are there any specified heights or distances apart? What is classed as high etc

 

[Dotty]

175kw boiler? Don't matter how high the roof, you can't rely on adventitious ventilation.

 

[AWheating]

needs vents as MIS

 

[TerryWaite]

175kw boiler? Don't matter how high the roof, you can't rely on adventitious ventilation.

No croppie, it's 38kw, i thought them vent sizes didn't seem right, I got them from a table in the manual, will post a pic later

 

[Roger Welton]

No specificaly provided vents, then fair enough.

Are pool boilers still on there own ticket?

 

[AWheating]

them sizes you have stated are probably compartment vent sizes. x 10 and x 20 approx i guess.

 

[TerryWaite]

 

[TerryWaite]

This is the only table referring to ventilation in the manual. I don't know where they get the figures from, they dont add up. It is a 35kw net input appliance, 35-7 (adventitious) = 28.

28 x 5 = 140cm2 of ventilation. Now I know there's probably a bit more adventitious in a garage than say a kitchen or utility room, but I'm just gonna go ahead and fit a vent anyway. That way, I am covered.

 

[TerryWaite]

Yeah looks like they are compartment vent sizes, i think they have put the wrong table in the manual or just not explained it very well, it did not mention anything of compartments when referring to the table.