The Boat Safety Scheme says:-

The formula for calculating the fixed ventilation requirement ( in mm 2) is as
follows:=

[2200 x U] + [650 x P] + [550 x H] + [440 x F],

whe U = input rating for all unflued appliances (inc. cookers) (in kW)
P = number of persons for which the accommodation space is designed
H = nominal output rating of all open €� flued solid fuel appliances (in kW)
F = input rating for all open €� flued appliances (in kW)


For my (quite small) cooker I want to install on my boat this gives
(ignoring everything else):-

2200 * 9.6 sq mm

as the cooker totals 9.6kW with three hobs, grill and oven.

Unless I'm going crazy 21120 sq mm is a hole about 100 x 200 mm which
seems quite large to me. Can one reduce the kW input to the maximum
that will be on simultaneously? That would reduce it a bit to 8kW.

It's still quite a big area of hole! I do realise it doesn't have to
be a single hole. Can I include all the ventilators in the boat
wherever they are or does the ventilation have to be within a certain
distance of the cooker?

--
Chris Green
·

Chris Green formulated the question :
It's still quite a big area of hole! I do realise it doesn't have to
be a single hole. Can I include all the ventilators in the boat
wherever they are or does the ventilation have to be within a certain
distance of the cooker?

I would suggest, that you can count the area of all the ventilation,
but only in the room where the appliance(S) is(are) located.

Harry Bloomfield wrote:
Chris Green formulated the question :
It's still quite a big area of hole! I do realise it doesn't have to
be a single hole. Can I include all the ventilators in the boat
wherever they are or does the ventilation have to be within a certain
distance of the cooker?

I would suggest, that you can count the area of all the ventilation,
but only in the room where the appliance(S) is(are) located.

Boats don't really have 'rooms'. The galley is open with the saloon
area, presumably ventilation to both areas can be counted.

--
Chris Green
·

Chris Green was thinking very hard :
Boats don't really have 'rooms'. The galley is open with the saloon
area, presumably ventilation to both areas can be counted.

If there are no doors or partitions between the areas, then I guess
include all areas of ventilation.

Is not all this an issue with Co2? I remember something vague from my
caravanning days where not only was cooking gas but lighting as well and you
could actually feel yourself getting drowsy and the condensation, blimey.

I would have thought all of this was sorted out by now, but apparently not
from your post.
Brian

--
----- -
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The Sofa of Brian Gaff...

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"Chris Green" wrote in message
...
The Boat Safety Scheme says:-

The formula for calculating the fixed ventilation requirement ( in mm 2)
is as
follows:=

[2200 x U] + [650 x P] + [550 x H] + [440 x F],

whe U = input rating for all unflued appliances (inc. cookers) (in kW)
P = number of persons for which the accommodation space is designed
H = nominal output rating of all open - flued solid fuel appliances (in
kW)
F = input rating for all open - flued appliances (in kW)


For my (quite small) cooker I want to install on my boat this gives
(ignoring everything else):-

2200 * 9.6 sq mm

as the cooker totals 9.6kW with three hobs, grill and oven.

Unless I'm going crazy 21120 sq mm is a hole about 100 x 200 mm which
seems quite large to me. Can one reduce the kW input to the maximum
that will be on simultaneously? That would reduce it a bit to 8kW.

It's still quite a big area of hole! I do realise it doesn't have to
be a single hole. Can I include all the ventilators in the boat
wherever they are or does the ventilation have to be within a certain
distance of the cooker?

--
Chris Green
·

Martin wrote:
On Thu, 15 Feb 2018 07:20:13 -0000, "Brian Gaff"
wrote:

Is not all this an issue with Co2? I remember something vague from my
caravanning days where not only was cooking gas but lighting as well and you
could actually feel yourself getting drowsy and the condensation, blimey.

I would have thought all of this was sorted out by now, but apparently not
from your post.

The problem is CO carbon monoxide poisoning. We cook in our boat with a hatch
open or partly open, or with the top washboard removed. If you have doubts take
a CO detector with you to your boat.

Yes, we have a CO alarm. However your '... with a hatch open or
partly open...' would fail the Boat Safety Scheme requirements, the
required amount of ventilation has to be 'uncloseable'. While my boat
(as it's in France) doesn't have to conform to BSC requirements I
suspect that the rules in France are pretty similar and, anyway, I'd
prefer to follow the rules if I can.

--
Chris Green
·

Martin wrote:
On Thu, 15 Feb 2018 09:59:44 +0000, Chris Green wrote:

Martin wrote:
On Thu, 15 Feb 2018 07:20:13 -0000, "Brian Gaff"
wrote:

Is not all this an issue with Co2? I remember something vague from my
caravanning days where not only was cooking gas but lighting as well and you
could actually feel yourself getting drowsy and the condensation, blimey.

I would have thought all of this was sorted out by now, but apparently not
from your post.

The problem is CO carbon monoxide poisoning. We cook in our boat with a hatch
open or partly open, or with the top washboard removed. If you have doubts take
a CO detector with you to your boat.

Yes, we have a CO alarm. However your '... with a hatch open or
partly open...' would fail the Boat Safety Scheme requirements, the
required amount of ventilation has to be 'uncloseable'. While my boat
(as it's in France) doesn't have to conform to BSC requirements I
suspect that the rules in France are pretty similar and, anyway, I'd
prefer to follow the rules if I can.

My boat is not in UK either. Common sense prevails. I got rid of gas from my
boat and from my kitchen. There are cases of people dying from CO poisoning
every year, but all the cases I have seen reported are people who died in their
sleep after closing everything and using gas to heat their boat. Any idea what
the Recreational Craft Directory requires on boat ventilation?

Our boat heating is 'room sealed' so all exhaust goes outside.

I'd expect the Recreational Craft Directive to be aligned with the UK
BSS. Looking at it there is simply a pointer to other documents in
section G for Gas Appliances.


--
Chris Green
·