Sterling HU300A1NS111 Nexus Series 300,000 BTU Gas Fired High Efficiency Condensing Unit Heater - Convertible Standard or Separated Combustion

Sku:
STERLING-HU300A1NS111
Special Order - Non-Cancellable - No Returns - Estimated lead time 10 - 12 weeks
$5,659.00
The Sterling HU300A1NS111 is a larger sized unit available in the NEXUS Series. It offers 95% efficiency rating with its 300,000 BTU input and 285,000 BTU output. The Nexus Series offers the highest efficiency ratings in the unit heater industry, offering ratings from 95% up to 99% efficient. They feature a unique tri-metal heat exchanger as well as a state of the art combustion control system. The heat exchanger is constructed of a hybrid combination of stainless steel tubes and brass and aluminum fins for maximum efficiency, enhanced corrosion protection and thermal heat transfer. In addition to the efficiency of these heaters, they include an auto-adjust altitude feature, which, as the name implies, is automatic. Requiring NO Field Adjustments, they automatically adjust the air and fuel mixture with no loss of performance. 
 
The Nexus Series heaters are field convertible to LP (single orifice kit included) and Separated Combustion operation. Additionally, they are PVC/CPVC vent compatible. Nexus unit heaters can be installed as single units or set up as a multi-unit network. The control board also includes ModBus communication for building automation without requiring additional control modules. The units also feature both indoor and outdoor air reset modulation. Indoor air reset learns the needs of the space by constant monitoring and modulates accordingly, resulting in less cycling and therefore lower fuel costs. Outdoor air reset functions in much the same manner, automatically adjusting and varying the indoor discharge air temperature based on the outdoor air temperature. Both of these functions offer your occupants a much more comfortable indoor environment while saving you money in the long run. The outdoor air reset feature is most favorable in areas where there are daily temperature fluctuations, but is a great feature year round. 
 
The HU300A1NS111 is a 300,000 BTU heater and can be installed just about anywhere as they are residential certified for use as a Utility Heater for use in a garage or workshop area. Additional standard features include:
  • 20 Gauge 430 Brushed Stainless Steel Cabinet
  • 4 Point Suspension
  • Combustion Blower and Power Ventor
  • Modulating Gas Control with Outside Reset (Master)
  • Blocked Inlet Air Pressure Switch
  • Blocked Vent Air Pressure Switch
  • Direct Spark Ignition
  • High Limit Switch
  • Condensate Trap
  • Condensate Flow Switch
This unit requires gas, vent and electrical connections. It is strongly recommended that a licensed HVAC technician install your gas heater.
 
 
STERLING - Manufacturing efficient heating products in the USA for over 50 years!
 
 
Because of differences in sizes of the various Nexus unit heaters, the item itself may differ in appearance from the item shown in the photo above.
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Sterling HU300A1NS111 Nexus Series 300,000 BTU Gas Fired High Efficiency Condensing Unit Heater - Convertible Standard or Separated Combustion
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Product Video

Product Overview

The Sterling HU300A1NS111 is a larger sized unit available in the NEXUS Series. It offers 95% efficiency rating with its 300,000 BTU input and 285,000 BTU output. The Nexus Series offers the highest efficiency ratings in the unit heater industry, offering ratings from 95% up to 99% efficient. They feature a unique tri-metal heat exchanger as well as a state of the art combustion control system. The heat exchanger is constructed of a hybrid combination of stainless steel tubes and brass and aluminum fins for maximum efficiency, enhanced corrosion protection and thermal heat transfer. In addition to the efficiency of these heaters, they include an auto-adjust altitude feature, which, as the name implies, is automatic. Requiring NO Field Adjustments, they automatically adjust the air and fuel mixture with no loss of performance. 
 
The Nexus Series heaters are field convertible to LP (single orifice kit included) and Separated Combustion operation. Additionally, they are PVC/CPVC vent compatible. Nexus unit heaters can be installed as single units or set up as a multi-unit network. The control board also includes ModBus communication for building automation without requiring additional control modules. The units also feature both indoor and outdoor air reset modulation. Indoor air reset learns the needs of the space by constant monitoring and modulates accordingly, resulting in less cycling and therefore lower fuel costs. Outdoor air reset functions in much the same manner, automatically adjusting and varying the indoor discharge air temperature based on the outdoor air temperature. Both of these functions offer your occupants a much more comfortable indoor environment while saving you money in the long run. The outdoor air reset feature is most favorable in areas where there are daily temperature fluctuations, but is a great feature year round. 
 
The HU300A1NS111 is a 300,000 BTU heater and can be installed just about anywhere as they are residential certified for use as a Utility Heater for use in a garage or workshop area. Additional standard features include:
  • 20 Gauge 430 Brushed Stainless Steel Cabinet
  • 4 Point Suspension
  • Combustion Blower and Power Ventor
  • Modulating Gas Control with Outside Reset (Master)
  • Blocked Inlet Air Pressure Switch
  • Blocked Vent Air Pressure Switch
  • Direct Spark Ignition
  • High Limit Switch
  • Condensate Trap
  • Condensate Flow Switch
This unit requires gas, vent and electrical connections. It is strongly recommended that a licensed HVAC technician install your gas heater.
 
 
STERLING - Manufacturing efficient heating products in the USA for over 50 years!
 
 
Because of differences in sizes of the various Nexus unit heaters, the item itself may differ in appearance from the item shown in the photo above.

Tech Specs

Style:
Ceiling Mount
Fuel Type:
Natural Gas (NG)
Separated Combustion Chamber:
Yes, Field Convertible
Heating BTUs (Input):
300000
Heating BTUs (Output):
285000
Thermal Efficiency:
95%
CFMs:
4848
Gas Connection Size:
3/4"
Vent Connection Size (in.):
4
Circuit Breaker Size (Amps):
15
Voltage:
110-120V
Clearance for Access Side (in.):
18
Clearance to Air Intake Side (in.):
36
Clearance to Top, Bottom and Non Access Side (in.):
6
Overall Height to Top of Combustion Air Inlet (in.):
27.125
Height (in.):
25.688
Jacket Width (in.):
54.813
Depth (in.):
42
Net Weight (lbs.):
323
California residents see Prop 65 WARNINGS

Warning WARNING!

Warning: Cancer and Reproductive Harm - www.p65warnings.ca.gov

Product Warranty

10-YEAR WARRANTY: Sterling HVAC warranties the heat exchanger, flue collector and burners of each unit heater to be free from defects in materials and workmanship for a period of 10 years from the date of manufacture.