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Armstrong Fluid Technology’s Tango line of pumps features innovative hydraulic design optimized for intelligent variable-speed operation.

The latest addition to American Standard Water Heaters’ residential line is its ANSI-certified Tankless Condensing water heaters.

These new models also come equipped with integrated controls that make temperature adjustment and diagnostic review easier.

Rheem’s Prestige series condensing tankless gas water heaters save water, energy and installation time.

Navien’s NPE-A series condensing tankless water heaters include an internal circulator and buffer tank.

Bradford White’s Infiniti Tankless Water Heaters feature exclusive SRT scale reduction technology.

A. O. Smith’s 540P series integrates a recirculation pump to provide hot water in residential applications with dedicated recirculation lines.

Noritz’s EZ Series of high-efficiency condensing tankless water heaters are engineered expressly for the North American residential market.

Bosch’s Greentherm 9000 Series offers nine models for high-efficiency domestic hot water in residential or commercial applications.

Can you identify several errors or suggest some more refined design approaches for this system?