On Fri, 02 Nov 2007 06:55:57 -0700, wrote:

Tadpole works on the same principle - reducing air in a primary
system down to 1 part in 2.5 million. Bleeding the radiators will not
achieve this as dissolved air is present in the water itself.

On what principle does having minute amounts of dissolved air in a system
affect it's effciency? Note I am asking only about the princple not
details or any information about the Tadpole device.

Now a direct question. Will the installation of a Tadpole to a system that
does not require regular(*1) bleeding of the radiators(*2) or filling
produce any measurable, by the householder, energy savings?

(*1) "Regular" meaning once a year or more frequently.

(*2) Also to include the singular, as in many systems it is only one
radiator that needs "regular" bleeding.

--
Cheers
Dave. pam is missing e-mail