Has there been any independent testing of Tadpole?

Has any testing been carried out in fully controlled laboratory
conditions so as to completely eliminate all environmental factors
such as seasonal variations form one year to another and the end-users
(or product developers) desire to see optimal results?

What is the physics behind why this device works? i.e. Why should
small reductions in air inside a central heating system result in
large changes in energy efficiency?

Can you make available test reports from an individual suitably
professional qualified (such as a physics phd) and employed by a
suitable independent institution (such as a university) to measure
energy efficiency?