Medical Definition of Sulfa drug Sulfa drug: One of the sulfonamides, the sulfa-related antibiotics which are used to treat bacterial and some fungal infections. The first sulfa drug was prontosil. It was discovered by the German physician and chemist Gerhard Domagk in 1935. Sulfa drugs kill bacteria and fungi by interfering with their metabolism. They were the wonder drugs before penicillin and are still used today.
NEXT STEP. Find out how much your project will cost. Provide a few details about your project and receive competitive quotes from local pros. The average national cost to install a geothermal heating or cooling system is $5,745, with most homeowners spending between $3,534 and $11,089.
Fact 2: The upfront costs are scary. Letâs not sugarcoat itâinstalling a geothermal system is expensive. It costs $10,000 to $30,000 depending on your soil conditions, plot size, system configuration, site accessibility and the amount of digging and drilling required.For a typical 2,000-sq.-ft. home, a geothermal retrofit ranges from $10,000 to $20,000.The system may require ductwork modifications along with extensive excavation. In a new home, installation costs would be on the lower end. Even so, a geothermal system will cost about 40 percent more than a traditional HVAC system.etâs not sugarcoat itâinstalling a geothermal system is expensive. It costs $10,000 to $30,000 depending on your soil conditions, plot size, system configuration, site accessibility and the amount of digging and drilling required.