Sterling XF400 Gas Unit Heater

- Replaces Sterling TF400 and SF400 heaters -

The Sterling XF series gas unit heaters replace the TF and SF series heaters and combine them into one unit that can be vented as standard open combustion (Exhaust pipe only) or separated combustion (Using both an exhaust and intake pipe). They are a great heating option for large greenhouses, warehouses, commercial structures, etc. Sterling XF heaters feature: tubular heat exchanger, power exhaust system, electronic ignition, advanced diagnostic system for dependable worry-free operation, lots of safety features, corrosion and rust resistant aluminized steel components for dependable worry-free operation, safety features like overheating controls and a safety shut-off, high power fan to provide even heat distribution, and a baked-on enamel finish made to protect the XF from harsh environments. They are designed for suspended mounting and require only a vent pipe and connections to a gas and electric line for installation. Some wiring required. Requires 110/120v electricity. Designed for propane or natural gas.

Sterling XF Heater Features

• 83% efficient
• Made in the USA
• Separated combustion ready
• Certified for commercial and industrial use
• Direct spark ignition
• Power vented exhaust
• Convenient diagnostic light and thermostat connections on outside casing
• 10 year warranty on the burner and heat exchanger

Heater Upgrade Options

Extended Parts Warranty
This extends the included 1 year parts warranty to 3 years. If replacement parts are needed, they will be provided no charge and shipped for free during the life of the warranty. Click here for terms

Heater Gas Type Setup
The heater will come equipped from the factory for whichever gas type you choose.

Stainless Steel Heat Exchanger
If the heater will be in a corrosive environment, upgrading to a stainless steel heat exchanger will increase the life of the heater. Units with stainless steel heat exchangers ship direct from Sterling. The current ship time is listed in the option selection area above. Must be ordered with heater.

2 Stage Gas Valve
Heaters with a two-stage gas valve start on the 1st stage at half output and only switch to the 2nd stage, full output, if the temperature inside the room continues to drop. This allows the heater to run more efficiently saving gas and money. Units with 2 stage valves ship direct from Sterling. The current ship time is listed in the option selection area above. Must be ordered with heater.

Elevation
If the heater will be installed at a location that is over 5000' above sea level, Sterling makes a special high altitude model for this application. Units setup for high altitude (above 5000') ship direct from Sterling. The current ship time is listed in the option selection area above. Must be ordered with heater.

Performance Specifications

For Greenhouse Sizing, use our Greenhouse Heater Size Calculator

Model	BTU Input	BTU Output	W x D x H	Weight (lbs)
XF100	100,000	83,000	25 1/4" x 43 1/2" x 33 1/4"	133
XF125	125,000	103,750	25 1/4" x 43 1/2" x 33 1/4"	145
XF150	150,000	124,500	25 1/4" x 43 1/2" x 33 1/4"	155
XF175	175,000	145,250	37 1/4" x 43 1/2" x 33 1/4"	191
XF200	200,000	166,000	37 1/4" x 43 1/2" x 33 1/4"	201
XF250	250,000	207,500	37 1/4" x 43 1/2" x 33 1/4"	211
XF300	300,000	249,000	55 1/4" x 44 3/4" x 34"	307
XF400	400,000	332,000	55 1/4" x 44 3/4" x 34"	335

Sterling XF Heater Specs and Dimensions
Sterling XF Heater Installation Manual
Greenhouse Heater Size Calculator

Item # 4071360, 4071370   Model # XF400A1NS111, XF400A1PS111, TF400A1NS111, TF400A1PS111