TD Series

Tubular Duct Furnace

Designed for use with existing systems for any ducted air application, the TD Series duct furnace is the latest addition to the tubular product line. Coupled with Sterling's "In-Shot" burner technology, TD units are built for superior durability, reliability and performance. Units are available in 7 sizes (100-400 MBH) and offer industry leading efficiencies with a limited 10-year heat exchanger warranty.

The TD duct furnace is designed so that it can be easily field converted to separated combustion using the optional "Air Inlet Kit" or "Combustion Air Inlet Kit". The unit can also be easily converted from right to left hand without requiring any additional parts.

All TD Series Literature

Standard Features

100 - 400 MBH
82% Thermal Efficiency
In-Shot Burner Design
20-Gauge Steel Jacket with Baked Enamel Finish
Double Wall Construction
115/1/60 Supply Voltage
Direct Spark Ignition
Redundant Single-Stage Gas Valve
115/24 Volt Controls transformer
Power Vented
20-Gauge Aluminized Steel Heat Exchange
Natural or Propane Gas
10 Year Heat Exchanger, Flue Collector and Burner Warranty
Four Point Suspension
Easy Access Control Panel
Left Hand Control Access – Field Convertible to Right Hand

Tubular Heat Exchanger

The Sterling HVAC tubular heat exchanger has been designed to provide maximum and uniform heat transfer. The low-pressure drop associated with this design enables heated air to be evenly distributed to the conditioned space. This curved, non-welded serpentine design experiences less thermally induced stress making it highly durable for significantly longer service life. All standard Sterling HVAC tubular heat exchangers are constructed of heavy duty 20-gauge aluminized steel with an optional 409 stainless
steel heat exchanger available for applications in mildly corrosive environments

Direct Spark Ignition System

Sterling HVAC TD units utilize a direct spark pilotless ignition of the burner, providing fast heat delivery. This highly reliable and efficient ignition system incorporates an integrated electronic control board to regulate the system sequence of operation, including an externally mounted LED indicator for simple troubleshooting.

Venting

The Sterling HVAC TD Series is ETL certified in accordance with category III venting requirements. This certification allows units to be vented both vertically and horizontally using either single wall or double wall venting materials. This venting flexibility of the TD duct furnace makes installation easier and more cost effective by allowing the installer to utilize existing venting components. The TD duct furnace can be field converted to separated combustion using the “Air Inlet Kit” or the “Combustion Air Inlet Kit”. This is recommended for units to be installed in dusty, dirty or mildly corrosive environments or where high humidity or slightly negative pressures exist. All critical components including the burners, direct spark ignition, and controls are fully enclosed within the unit and protected from the elements ensuring clean and efficient combustion.

Control Accessibility

Designed with the service person in mind, every component of the Sterling HVAC TD Series is easily accessible. Ignition and fan controls are located in one centrally located control panel. The access panel provides control isolation as well as a pleasing exterior appearance.

Literature

All the Literature associated with the TD Series

For additional items browse the full Literature library at the link below.

Literature Library

Performance

Performance, Materials and Features for each TD Series capacity model.

Name	100	150	200	250	300	350	400
MBH Input	100 MBH	150 MBH	200 MBH	250 MBH	300 MBH	350 MBH	400 MBH
MBH Output	82 MBH	123 MBH	164 MBH	205 MBH	246 MBH	287 MBH	328 MBH
Thermal Efficiency	82%	82%	82%	82%	82%	82%	82%
Air Temp Rise	30°F - 100°F	30°F - 100°F	30°F - 100°F	30°F - 100°F	30°F - 100°F	30°F - 100°F	30°F - 100°F
Min CFM	758 CFM	1,137 CFM	1,517 CFM	1,896 CFM	2,275 CFM	2,654 CFM	3,034 CFM
Max CFM	2,528 MBH	3,792 MBH	5,057 MBH	6,321 MBH	7,585 MBH	8,849 MBH	10,114 MBH
Pressure Drop	0.65	.44	.54	0.76	0.69	0.76	0.70

Markets

The TD Series is quite versitile it can be installed in a variety of applications. Here are a few key ways The TD Series can make your space more comfortable.