Help! Are there "lemon laws" for items other than cars?

We built a new (expensive) veterinary hospital and moved in December of 2010. From the moment we moved in, the HVAC system has not worked correctly. Cold weather is fine – but when the temperature rises, we’re screwed. Units freeze up, electronic panels die, the AC will run in one section of the hospital and the heat will be on at the same time if other sections…..I don’t think we’ve gone more than a week without having to call for help. I’ve hesitated to switch to a new company only because the one we’re using is the same company that installed the system (one assumes that they would be the most familiar with it). So either the entire system sucks, or their service department doesn’t know what they’re doing, or both.

I’m now planning on making a formal complaint to 1) the engineers who designed the system 2) the contractor who hired the installation company, and 3) the installation and service company. My question to the collective is whether I have any legitimate recourse; besides complaints, online reviews, and the Better Business Bureau, do I have any real threat to try to get satisfaction? All I want is a system that works, that I don’t have to spend a fortune on paying service fees, that doesn’t burn up electricity like the freaking Pentagon.