Gas water heaters.. got me thinking

[Alan de Enfield]

16 minutes ago, Mad Harold said:

But surely Alan,the heat generated by the burner sends the CO up the flue,and also when the pilot light is on.

 

NO, that's why CO is a problem - your water heater is not a room sealed system.

 

That's why on non-private boats they can only install room sealed water heaters (as room sealed water heaters are now available)

 

https://www.thecaravanwarehouse.co.uk/Products/001800010002

 

From the BSS :

 

The provisions of this section of Part 8 in the 2002 BSS Standards are mandatory for non-private boats where applicable.

Appliances which are not room-sealed but which were installed before 3 January 2000 can continue to be used, as long as they are serviceable and in good condition.

Replacement and additional new appliances to the boat must be of the room sealed type, except for cooking appliances and, in the absence of a direct replacement, instantaneous water heaters.

To help ensure continued safe operation of an appliance any modifications or additions to an existing appliance must be performed in accordance with the manufacturer's guidelines. Defective or inappropriate components could lead to a gas leak or inefficient combustion and the production of noxious gases. [8.2]

Edited June 18, 2020 by Alan de Enfield

[Sir Nibble]

I would have thought that the first reference would be the manufacturer's installation instructions for ventilation requirements.