Prestige Excellence High Efficiency Space Heating and Domestic Hot Water All-in-One The Prestige Excellence Series combines a High Efficiency Condensing Stainless Steel Wall Mounted Gas Boiler with a built-in “Tank-in-Tank" Indirect Fired Water Heater.

In addition to the reliability and economy of a 110 Series Stainless Steel Condensing Boiler the Prestige Excellence Model's 14 gallon in-cabinet Indirect Fired Water Heater is capable of producing 180 gph of domestic hot water.

It's a winning combination.

FEATURES:

• 95% AFUE Efficiency
• Abundant Domestic hot water with standard mixing valve
• Highest water content in the industry
• Ideal for small zones without short cycling
• Self Cleaning / Self Descaling
• Condensate washes combustion residue away when streaming
• down the tubes resulting   in a constant efficiency and reduced
• maintenance
• Quiet operation
• Fully Modulating
• Built-in Exclusive “Tank-in-Tank” Indirect Fired Water Heater
• Unparalleled resistance to corrosion
• Less sensitive to water flow
• Vertical Firetube Design
• 439 Grade Stainless Steel Heat Exchanger
• Impervious to chloride cracking
• Stable temperature control
• Low pressure drop
• Condensate washes combustion residue away
• Control panel with digital display
• Standard Outdoor Reset
• Digital Display
• Direct Vent / Sealed Combustion
• Built-in 3 Speed System Circulator

Smart Series The Smart Choice in Indirect Fired Water Heaters

The decision to use stainless steel for the manufacture of the "Tank in Tank" was made in the 60's. It was chosen for its well established reliability and advantages over other materials, namely: Stainless steel is stable at elevated temperatures above 180ºF, which is not the case for tanks manufactured from mild steel protected by a glass lined coating. It is for this reason that some manufacturers include a clause in their guarantee limiting the DHW storage temperatures to 140°F or even 130°F. Stainless steel, as its name suggests, is resistant to corrosion. The protective coatings in an enameled tank can be damaged by a shock during transportation, unloading or maneuvering it into position. This is not the case with stainless steel. Last, but not least, a stainless steel tank does not need a sacrificial anode. This is a major advantage versus conventional water heaters. Stainless steel is also universally recognized for its hygienic properties and is frequently used in the manufacture of items for the food industry and for surgical instruments. There is little chance of its use being questioned on the basis of it being a health hazard. Conversely, protective coatings, i.e. enameling cannot be examined everyday and their failure could lead to unhealthy consequences.

TANK-IN-TANK

There are two major types of water heaters, those with coils and the twin walled tank. The water heater which we manufacture, the "Tank-in-Tank", doesn't fall within either of these categories. The difference between our water heaters and those with coils is clear since in the former the primary fluid heats the domestic hot water from the outside while the other heats it from the inside out. On the other hand the twin walled water heaters have an area near the bottom which is not heated and the heat transfer surface is smaller than in the "Tank-in-Tank".

The most important characteristic of the "Tank-in-Tank" system is its capability for auto-descaling and its long life expectancy combined with the reduced requirement for regular maintenance.