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Laars
Rheos+
Water Heater

CSI CONSERVATION SYSTEMS INC 407.351.9121    CONTACT    HOME
 
Advanced Hot Water Technology Pays Dividends!
The LAARS Rheos+ fully condensing water heating boiler is a breakthrough in commercial domestic hot water system design. Now, for the first time, engineers and heating contractors can choose a single, reasonably priced, high-efficiency water heater for commercial installations requiring up to 2.4 MBH input. "Plug and Play" versatility, true full modulation, advanced combustion design, flexible venting and piping options, extensive onboard diagnostics, and multiple control configurations make the Rheos+ ideal for many applications.
The Rheos+ saves fuel automatically by adjusting its firing rate from 100% to 25% (a 4-to-1 turndown ratio) in response to the demand for heat. This sophisticated proportional firing control system delivers thermal efficiencies as high as 98% and can save owners from 30% to 50% in fuel costs over conventional, non-modulating systems.LAARS Rheos+ Boiler
 
With combustion efficiencies as high as 87%, the Rheos+'s self-monitoring sealed combustion system further enhances performance. A powerful variable-speed combustion blower brings filtered outside air directly into the unit (no indoor air is necessary) and, at the same time, forces the toxic byproducts of the combustion process outside the building and into the atmosphere. As a further cost advantage, heavy, multi-walled gas venting is not required.
 
The Rheos+ can be staged with up to eight other units with the LAARS MC multiple modulating boiler sequencing control (with outdoor reset and all control algorithms) for a unified ultra-high efficiency heating installation.
 
The Rheos+ automatically optimizes its operation and will run at full efficiency "right out of the box." It is also compatible with most building automation system (BAS) products and interface cards for most popular control systems are available (Metasys, LONWorks, etc.).
 
The Rheos+ also features the highest density and smallest footprint available, so it takes up far less floor space. In fact, it's so compact it can fit through a standard doorway.
 
Brochure   Submittal Data   Operating Manual
| Ratings | Recovery Data | Sizing Data | Parts |   
 
Rheos+ RHHV Ratings
Performance ratings for low and high fire operation.
Model 1200 1600 2000 2400
High Fire Input MBH 1200 1600 2000 2400
High Fire Output MBH 1080 1440 1800 2160
Low Fire Input MBH 300 400 500 600
Low Fire Output MBH 270 360 450 540
Important Note: Output shown is calculated using a 90% combustion efficiency. The efficiency of this unit will increase with lower return water temperature and/or lower modulation point, which will alter the output of the Rheos+.
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Rheos+ RHHV Recovery Data
Rate in gallons per hour (GPH) at which hot water at the indicated temperature (°F) is produced.
Model 40°F 50°F 60°F 70°F 80°F 90°F 100°F 120°F 140°F
1200 3241 2593 2161 1852 1621 1441 1297 1080 926
1600 4322 3457 2881 2470 2161 1921 1729 1441 1235
2000 5402 4322 3601 3087 2701 2401 2161 1801 1543
2400 6483 5186 4322 3704 3241 2881 2593 2161 1852
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Rheos+ RHHV Sizing Data
Connection sizes, electrical requirements and shipping weights.

Model 1200 1600 2000 2400
Water Connections 2½" NPT 2½" NPT 3" NPT 3" NPT
Standard Gas Connections* 1" NPT 1½" NPT 1½" NPT 1½" NPT
Vent Size (Cat. IV) 6" 6" 7" 10"
Combustion Air Inlet Size 6" 8" 8" 8"
Electrical Requirements (Boiler) 120V 1P 20A 60 Hz
Electrical Requirements (Pump) 120/230V 1P 40/20A 60Hz
Approximate Shipping Weight 1420 lbs. 1465 lbs. 1495 lbs. 1550 lbs.
*Gas connection sizes may vary with Control Package selections. See Submittal Data sheets for complete gas connection sizing information.
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Central Florida Representative:
Manufacturer:
Conservation Systems, Inc.
5850 Lakehurst Drive, Suite 120
Orlando, FL 32819-8386
407.351.9121 Phone
407.352.6391 Fax
www.csiworldwide.com
Laars Heating Systems Co.
A subsidiary of Bradford White Corporation
1355 Kuehner Drive
Simi Valley, CA 93063-4478
1-800-900-9276
www.laars.com 
 
Specifications subject to change without notice.
Please read our Terms of Sale notice carefully before placing an order.
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