Rheem’s Professional Prestige combination boiler is the latest innovation to the company’s high-efficiency tankless gas water heater lineup. Rheem’s Energy Star-rated combi boiler ensures efficient hydronic heating even in the coldest climates, while also providing homeowners with continuous hot water and reduced utility costs, it states. The boiler’s compact design is ideal for smaller homes or multifamily applications to free up valuable space without sacrificing optimal performance. Rheem. www.rheem.com