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Natural Gas and Hot Water Boilers
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Gas Fired Hot Water Boiler
A hot water boiler is an appliance used to heat water for a hydronic heating system. The hot water is distributed through the home in pipes into the rooms with either a steel radiator (newer homes) or cast iron radiator (older homes) or baseboard convectors or "fin-tube"(newer homes). Once the radiator or baseboard fin-tube convector is heated with the hot water, the water is returned back to the boiler to be re-heated and the water circulation loop continues.
These boilers can be fueled either with natural gas or propane (gas-fired) or they can burn fuel-oil (oil-fired). Fuel-oil boilers are higher maintenance than their gas burning counterparts and require regular attention to the blower and oil filter.
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BIMINI - Super High Efficiency - 95.4%
Combusition efficiencies up to 96.1% AFUE
BIMINI features low-mass, cast aluminum heat exchangers which transfers heat more efficiently. Aluminum provides superior corrosion resistance, which is important on condensing boilers.
Why a condensing boiler:
Condensing design is necessary in a very high efficiency boiler. When the boiler is operating at maximun efficiency the exhaust temperatures become so low that water vapor in the exhaust condenses. The boiler has to be designed to drain away this liquid.
Our BIMINI is avaiable in nine sizes to accomodate any style of home.
The BIMINI uses less floor space that other similary sized boilers, and the smaller sizes can be hung on the wall.
Special Features of the BIMINI:
 View Product Brochure and Specification
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CABO 2 - High Efficiency - 85%
Ideal for today's homeowners looking for a more energy efficient boiler
The CABO 2 offers multiple venting options: through-wall venting for applications where there is no chimney or where existing chimney is old and in need of expensive repairs: horizontal or vertical installation to suit most locations.
Features of the CABO 2:
Energy star qualified
Proven reliable: designed with the benefit of KEIL's years of experience, employing technology proven in service, with the newest in controls to optimize operation.
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MAUI - Wall Mounted Boiler
The Maui is a wall mounted boiler available in a "heat only" or "combi" model
Its compact design and ability to deliver both heat and hot water from the same unit (when the combi model is installed) makes it ideal for applications where space is at a premium.
Key Features:
Key Benefits:
- Compact and Lightweigh Design
- Combi Model provides both heat and hot water
- Low Operating Noise Level
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BALI - Direct Vent
Through-the-wall venting for homes without chimneys or where the chimney cannot be used
BALI gas-fired, hot water boilers from KEIL meet the challenge of providing higher efficiency than many standard boilers for homes where the chimney cannot be used.
An integral draft fan system designed into the BALI permits venting directly through a wall. Rugged cast iron heat exchanger and stainless steel burners are backed by a Lifetime limited warranty, and the simplicity of design and reliability ensures years of low maintenance operation.
The BALI is available in six sizes (from 61,000 to 229,000 BTU input) to serve both small and large homes and businesses. The attractive and durable two-tone, powder coated jacket encloses most of the controls and wiring for a sleeker appearance, and it can be installed on any non-carpeted combustible surface. The Bali meets all national standards, and the heat exchanger meets the specifications of the American Society of Mechanical Engineers.
The BALI is among a new series of designs that have created for ease of use, constructed for long life and engineered to provide the most value for each energy dollar. That's our commitment to quality.
BALI has all these features for optimum performance and safety
For Peak Performance:
For Your Safety:
View Product Brochure and Specifications
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CAYMAN - Optional Tankless Coil
The CAYMAN is the newest in gas-fired hot water boilers from KEIL and is available in a wide range of sizes from 69,000 to 379,000 BTU/HR input.
CAYMAN has all the features that KEIL customers have come to love in the ARUBA3 series and more, including highter AFUE's an optional tankless coil for domestic hot water (see specifications) and a larger range of available sizes.
Crafted with a rugged, cash iron heat exchanger and stainless stell burners that are both baked by a Lifetime limited warranty, the CAYMAN offers proven-in-service reliablity, simplicity of design and economny in its purchase price and consumption of fuel.
The CAYMAN is available with standing pilot or electronic ignition for greater enery efficiency. Honeywill controls provide reliability, ease and convenience.
Attractive and durable, the two-tone, powder-coated jacket resists scratching. Plus, it's insulated to retain heat. The CAYMAN meets all national standards, and the heat exchanger meets the specifications of the American Society of Mechanical Engineers.
Our CAYMAN is the latest in a series of designs that engineers have created for ease of use, constructed for long life and engineered to provide the most value for each energy dollar. That's KEIL's commitment to quality.
For Safety:
For Performance:
- Cast iron heat eschanger with a Lifetime limited warranty
- Stainless steel burners with a Lifetime limited warranty
- Built-in draft hood fits in low spaces
- Aquastat mounted directly into heat exchanger for improved response
- Reliable Honeywill controls
- Appliance quality, powder-coated jacket
- Fiber-glass insulation to minimize wasteful heat loss
- High performance circulator
- Motorized vent damper reduces chimney losses
- Temperature/pressure gauge
- Drain valve
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ARUBA3
Perfect for residential applications with masonry chimneys
Our KEIL ARUBA3 is our best selling gas-fired, hot water boiler. It comes in a wide range of sizes from 37,000 to 295,000 BTU/HR input.
Crafted with a rugged, cast iron heat exchanger and stainless steel burners that are both backed by a Lifetime limited warranty, the ARUBA 3 offers proven-in-service reliability, simplicity of design and economy in its purchase price and consumption of fuel.
The ARUBA 3 is available with standing pilot or electronic ignition for greater energy efficiency. Honeywell controls provide reliability, ease and convenience.
Attractive and durable, the two-tone, powder-coated jacket resists scratching. Plus, it's insulated to retain heat. The ARUBA 3 meets all national standards, and the heat exchanger meets the specifications of the American Society of Mechanical Engineers.
The ARUBA 3 is the latest in a series of designs that were created for ease of use, constructed for long life and engineered to provide the most value for each energy dollar. That's our commitment to quality.
ARUBA 3 has all these features for optimum safety and performance:
For Your Safety:
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80% - 83% AFUE
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Factory tested for flame quality, leakage, control system operation and overall performance
- Combination high limit/circulator relay control regulates water temperature
- Spill switch detects venting problems to prevent carbon monoxide build-up
- Rollout switch detects heat exchanger blockage
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ASME relief valve (set at 30 psi) for safety
For Peak Performance:
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