How to Pick the Perfect City Multi Outdoor Unit
When dealing with very large buildings with many different zones, choosing a hea...
Local Pickup FAQ's
Hover to zoom
1 of 1
Williamson-Thermoflo GSA-100-STP Standing Pilot Gas Steam Boiler 81.3% - 100,000 BTU
Model:
GSA-100-SPT-Natural
+
Share This Product
Features
- One-piece access door.
- Insulated Extended Steel Jacket.
- Cast Iron Sections.
- Gauge glass and guard assembly.
- Pressure gauge and siphon assembly.
- Safety Relief Valve.
- Drain Valve.
- Pressure limit control.
- Probe low water cutoff.
- Transformer and Junction Box.
- Automatic Vent Damper.
- 120V Power switch
- 100% Shut-off Combination.
- Non-Linting Pilot Burner.
- Stainless Steel Burners.
- Vertical Drafthood
- Blocked Vent Limit Switch.
- Flame Roll-Out Switch
- Factory tested.
The Williamson-Thermoflo GSA series boiler is a cast iron gas-fired low pressure steam boiler designed for use in closed heating systems. This boiler must be vented by natural draft into a lined masonry or metal chimney, or Type L vent. An adequate supply of air for combustion, ventilation and dilution of flue gases must be available in the boiler room. The GSA series boilers are made for most residential applications and with sizes from 75,000-250,000 BTUs we have the right unit for you.
To design and build the best comfort heating products on the market. To make them first. And to make them last...for decades.
Features and Benefits of the Williamson GSA Steam Cast Iron Boiler
Traditional Cast Iron Sections.
Factory Packaged.
Compact Design: Saves valuable living space.
Stainless Steel Burners: Burners provide fixed primary air-no air adjustment required. Provide quieter ignition, longer life, and improved combustion.
Honeywell controls. High quality brand name controls assure reliability and availability.
Wiring Harness: Plug-in connectors that attach only one way to assure mistake-proof wiring for installation and component replacement.
Convenient Servicing: Accessible controls-control module with diagnostic indicator lights-simplified wiring-vertical flueways-top cleaning.
Cast Iron Sections with Push Nipples: Boiler sections are made of durable cast iron for strength, efficiency and long life.
Automatic Vent Damper: Prevents heat from escaping up the chimney when the burners are not operating. Saves fuel. Standard equipment on GSA models.
Made in the USA.
Other Standard Features :
Product Warranty
1 year parts / 10 Years heat exchanger
Specifications
GSA-100-SPT-Natural
Performance
Maximum Input Capacity
Maximum Input Capacity
The Maximum Input Capacity describes how quickly the appliance will use fuel when delivering it's maximum capacity. The units may change depending on the fuel being used.
100000 BTU
DOE Heating Capacity
DOE Heating Capacity
Also referred to as Gross Output, this is the output of a boiler after accounting for combustion efficiency. We recommend sizing hot water boilers based on the DOE Heating Capacity.
83000 BTU
Efficiency
81.3 %
Warranty Information
Parts Warranty
Parts Warranty
A warranty is a safeguard from defects in manufacturing and can vary in length and terms. Some manufacturers require registration for extended warranty benefits, be sure to check out features and the warranty document. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
1 Year
Heat Exchanger Warranty
10 Years
General Information
Medium
Medium
Medium refers to the substance that carries heat through the heating system. Systems are either designed to use either Hot Water or Steam as a medium, and components are usually specific to one or the other.
Steam
Fuel Type
Fuel Type
To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
Natural Gas
Combustion Type
Combustion Type
Condensing appliances use leftover thermal energy from combustion gases to heat water in a secondary heat exchanger, resulting in higher efficiency and lower exhaust temperature.
Conventional
Vent Type
Vent Type
Products that use combustion (burning) of fuel to create heat also create potentially dangerous gasses that need to be exhausted (AKA "Vented"). Depending on the product, venting can be done via a chimney, through a side wall, or use a second vent to provide fresh air to the appliance.
Chimney Vent
DHW Production
DHW Production
DHW (Domestic Hot Water) is potable water for uses other than space heat. Some boilers are able to provide DHW "out of the box", while others can do so with the purchase of optional accessories.
Yes
Modulating/Staging
Modulating/Staging
Stages are unique speeds or levels that equipment can operate at. More stages allow for better fine-tuned control of output, which improves comfort and efficiency. Modulating equipment can operate across a range of levels, giving the highest level of fine-tuned control. Learn More
Staging
Mount Type
Floor
Minimum Altitude
0 Feet
Maximum Altitude
2000 Feet
Includes Pump
Yes
Assembly Type
Packaged
Electrical Data
Voltage
115 Volts
Phase
1
Frequency
60 Hz
Dimensions
Supply Connection
3 Inches
Return Connection
2 1/2 Inches
Product Height
33 3/4 Inches
Product Width
17 Inches
Product Depth
27 5/8 Inches
Product Weight
430 Pounds
Reviews
Williamson-Thermoflo GSA-100-SPT-Natural Reviews & Ratings
Be the First to Write a Review
Do you own this product?
Please share your insights with fellow shoppers.
Please share your insights with fellow shoppers.
How-To Articles
Smart, Safe, Clean Home Tips
Americans spend around 90 percent of their time indoors, whether it's working, ...
Heat Pump Hybrid Water Heater Buyers Guide
If your gas or electric water heater is nearing the end of its life, replacing ...
eComfort How-To Library
Articles, Tips and Buying Guides from Our Experts
Ask A Question!
*Required Fields
+
Thank You For Submitting Your Question
Your submission has been sent successfully. Please give our experts up to two business days to respond.
Media Gallery
Williamson-Thermoflo GSA-100-STP Standing Pilot Gas Steam Boiler 81.3% - 100,000 BTU
Customer Review Images
