QHT provides the most adaptable, fuel efficient and environmentally friendly boilers and heating systems available at a very competitive price. QHT has pioneered the use of the triple-pass, low-mass, cast-iron residential boilers here in North America. Our state-of-the art Biasi boilers can be fired by oil, natural gas or propane with a simple switch of the burner. Together with a digital control, called the Cold Start Heat Manager, QHT can offer one of the most efficient ways of heating with a hydronic system.