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Product Description
Sterling Horizontal Hydronic Unit Heater Features:
• Horizontal airflow.
• "HSA" serpentine units have side piping connections. This permits the unit to be installed in low clearance areas. For hot water use only.
• "HSB" headered units have top and bottom piping connections. For hot water or steam use.
• Copper tubes.
• Aluminum fins.
• Adjustable discharge louvers.
• Balanced aluminum fan.
• Fan guards are standard on most arrangements. See specifications for details.
• Motor and electrical junction box.
• 20 gauge casing with baked on finish.
• Horizontal airflow.
• "HSA" serpentine units have side piping connections. This permits the unit to be installed in low clearance areas. For hot water use only.
• "HSB" headered units have top and bottom piping connections. For hot water or steam use.
• Copper tubes.
• Aluminum fins.
• Adjustable discharge louvers.
• Balanced aluminum fan.
• Fan guards are standard on most arrangements. See specifications for details.
• Motor and electrical junction box.
• 20 gauge casing with baked on finish.
Additional Information
| Model And Description | Sterling | HS-118A Horizontal Hydronic Unit Heater | Side Piping Connections | Hot Water Only | 18,400 BTU/HR (200F Water) | 500 CFM |
| Brand | Sterling |
| Energy Source | Hot Water |
| Voltage | Standard 115 Volt / 1 Ph / 60 Hz. (Other Voltages Available) |
| Capacity | 18,400 BTU/HR (200F Water) |
| Airflow | 500 CFM |
| Product Type | Horizontal Air Delivery Hydronic Heater |
| Dimensions | Cabinet With Standard Motor: 16"H x 18"W x 9-1/2"D (See Datasheets For Detailed Dimensions) |
| Weight | 24 Pounds |
| Link To Catalogs | Sterling HS Hydronic Unit Heater Catalog
Sterling HS Hydronic Unit Heater Installation Guide Sterling HS Hydronic Unit Heater Submittal |
| Warranty | 1 Year Parts Only. |
| Availability | Standard units are built-to-order in 5-10 business days. Special units (coated, EXP motors, higher voltages, etc.) are built-to-order in 10-15 business days. Plan an additional 2-5 business days for shipping. |
| Shipping | As always, shipping in the USA (lower 48 states) is included. Orders less than 100 lbs ship via UPS Ground. Larger orders ship via truck (FedEx Freight, Roadway Express, Old Dominion, etc). Local pick-ups at the factory are not allowed. Please contact us for shipping quotes to Hawaii and Alaska. |
| Questions | If you have any questions, please EMAIL or call Toll Free: 877-301-4660. |


