A star and that is only because one must not fail ...

A star and that is only because one must not fail to that given someone. Zero stars, is the right review.
Has for almost 7 years had a system that has never worked optimally.
For the last 7 months we have had to heat our house with electric heating, as our expensively purchased ground heating has not worked.
During this period, Genvex has not responded to emails or otherwise been reachable.