Pulte Homes uses poor parts and construction

We have had a lot of negative experiences with Pulte's home construction. It seems they have undersized the ducts on our home and not provided appropriate dampers to adjust the airflow appropriately (it would cost about $8000 to repair that, but we have chosen not to do that). The air conditioner failed after only 6 years to the tune of about $6300. The main sink faucet valve broke as well. Overall we have been pleased with the home but the appliances (A/C) and fixtures (sink faucets) seem to be poor quality