Any ventilation needed?

[meow2222]

Hi

Is there a requirement for any ventilation for a room with a sealed balanced flue gas space heater in? Or can the room be airtight?

thanks, NT

[fred]

In article , [e-mail] writes

No formal requirement, it defaults to any requirements laid out in the installation instructions, mine (a Keston) requires ventilation.

[fred]

In article , fred writes

Bollx, misread heater for bolier, if ventilation is required however it will be in the installation instructions (missing?).

[meow2222]

... naturally :) thanks

NT

[js.b1]

I would telephone baxi, but the whole idea of balanced flue is that combustion air is drawn in from outside.

There is a need for trickle ventilation in windows for humans, but I do not think you need a "gas vent, do not obstruct" 9"x6" grill sleeved through a cavity wall as with say a 10kW input conventional gas fire in class-1 chimney.

Balanced flue gas heaters are great for efficiency over conventional gas fires - not as good as a condensing boiler, but a huge improvement over the 32% outset DFE & 60% radiant outset in a chimney. Never looked to see if they do a "flame effect" version - if they do I suspect they are built-in & big.

[John Weston]

Not particularly big, if flame effect is the need. This one fits in a normal 16" fire recess or similar on a wall (90% efficient, according to the specs). Not

10KW though.

I've got a Paragon focus HE, conventional 16" hearth fire replacement type with a glass front that requires only once/hr room air change. No additional room vents were necessary. The balanced flue version is fully room sealed.

[meow2222]

I assumed that with a cast iron exchanger the efficiency would be poor.

NT

[Man at B&Q]

Can it really be 90% with orange flames, or am I confusing flame colour and efficiency?

MBQ

[js.b1]

That is beautiful. I'm thinking of a hall - the usual gas wall heaters are pretty ugly. That would look superb, not impossible to "build it in".

Most gas wall heaters are about 72-79% efficient, I think rinai (sp)? are 89%. Not all have cast iron heat exchanges, I think one Baxi has pressed-steel - you can buy them separately for about =A354. Gas wall heaters are better than storage heaters for "on demand".