We bought what was marketed as a single-family ranch style house only to discover it is a pre-fab modular home. What can we do?

We are 1st time homeowners; we bought a home that was marketed and sold as a traditional single-family ranch style home. We recently had a professional check our crawlspace for mold and structural issues, he told us there was no need for any services due to the fact that our house is a modular sitting on cinder blocks. That same day we had to buy a new furnace. The heating/cooling company told us the furnace that came with the house was meant for a traditionally built home. We needed to replace it with a furnace designed for a mobile home and had most likely been breathing unhealthy levels of carbon dioxide for 2 years. Our ignorance and excitement at becoming homeowners made it easy for the parties involved to omit certain facts and abuse our trust in them. I have paperwork that lists our home as "traditionally built" when in fact it is not. Do we have any recourse here?