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Residential Heating
Challenger Combination Boiler
High Efficiency Space Heating and Domestic Hot Water in a Compact Package
The Challenger Combination Boiler features a unique “Two in One” heat exchanger that provides both space heating and domestic hot water. The Challenger Combination Boiler is designed to fit the needs of today’s energy efficient homes with inputs of 85, 105, and 125 MBH. The Challenger is not only energy efficient with an AFUE of 94%, but space efficient as well.

As a combination boiler, the Challenger eliminates the need for a separate domestic hot water tank. The unique heat exchanger in the Challenger heats domestic hot water directly, allowing the boiler to condense in the DHW mode and eliminating a separate heat exchanger and three-way valve.
Challenger Solo Boiler
High Efficiency Space Heating in a Compact Package
The Challenger Solo Boiler features a unique insert cast heat exchanger that provides the light weight and efficient heat transfer of aluminum with the durability of copper waterways. The Challenger Solo Boiler is designed to fit the needs of today’s energy efficient homes with inputs of 85, 105, 125, and 145 MBH. The Challenger is not only energy efficient with an AFUE of up to 94%, but space efficient as well.

The Challenger Solo boiler can provide both heat and hot water when paired with an indirect water heater such as the Smart product line.
Keystone Condensing Boiler
High Efficiency Condensing Boilers from 399 to 850 MBH
Keystone Condensing Boilers provide powerful solutions for large residential and light commercial applications with 5 models with inputs from 399 to 850 MBH. These products feature a stainless steel heat exchanger with a thermal efficiency between 95 and 97%. Their compact design minimizes floor space while the cabinet provides easy access to all components. The large user friendly control interface makes set-up easy. The advanced control modulates the boiler with a 5 to 1 turndown ratio. Up to 8 boilers can be joined in a cascade while the control features parallel modulation and boiler rotation to maximize efficiency and service life.

Keystone Condensing Boilers from 500 to 850 MBH are CSD-1 compliant as a standard feature. This saves both cost and installation time.
Prestige Trimax Solo Series
High Efficiency Stainless Steel Wall Mounted Gas Boilers
Who says comfort only comes at a price? The Prestige Condensing Wall Mounted Boiler proves it doesn’t. The Prestige boiler features a uniquely designed stainless steel heat exchanger and offers 95% efficiency. The Prestige has the capability to modulate the firing rate to 25% of its rated input and is available in 5 inputs; 60, 110, 175, 250 and 399 MBH. This modulation means fewer cycles resulting in lower operating costs. The unique TriMax Control makes installation use fast and easy with 60 second easy set-up. The TriMax allows for multiple circulators and temperatrue zones and has an integrated cascade feature to join mutiple boilers.

Combined with a Smart Indirect Fired Water Heater, Prestige provides cost-effective, reliable heat and an abundant supply of domestic hot water. The Prestige can be vented directly out of a sidewall with PVC pipe. The Prestige requires minimal installation space, operates quietly and features an attractive jacket with a digital control panel. The boiler is equipped with a stainless steel premix burner and is available for natural gas or propane.
Prestige Trimax 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.
Smart Series
The Smart Choice in Indirect Fired Water Heaters
STAINLESS STEEL

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.

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