Roth’s geothermal heat pump systems are insulated with sound-deadening material. Variable-speed ECM blower motors are standard on all Roth equipment. The coated air coils prevent corrosion and ensure longevity. They use heavy-gauge, powder-coated steel, foamed-in heat exchangers that prevent condensation and durable stainless-steel drain pans that are resistant to corrosion. The Roth Packaged Two-Stage Combination RCT Series combines hydronic heating capability for radiant floor heating with forced air\heating and cooling in a single unit. The Roth Water-to-Water RWT Series with optional matched hydronic air handlers can be used for radiant floor and snow-melt applications.