A little extra attention to details can mean a world of difference.
If you've been in the radiant heating business a few years, chances are you've seen at least one thermally challenged installation. Perhaps it was a system you were called in to correct. A job designed and installed by a P&H contractor with good intentions and considerable experience with traditional hydronic baseboard systems, but lacking training in modern low temperature radiant systems. With an air of self-confidence justified by his tenure in the industry, this contractor probably visualized the pending radiant job as little more than a slight variation on the baseboard systems he'd been installing for years.
I recently got called to look at just such a job. The location and installing contractor are irrelevant. Based on what I've seen and heard, this job could show up anywhere in North America. It could be built with anybody's tubing, boilers, pumps and controls. The installation errors are not product specific. Instead they fail to recognize some fundamental limitations imposed by thermodynamics.