{"id":5373,"date":"2025-08-28T19:08:30","date_gmt":"2025-08-28T19:08:30","guid":{"rendered":"https:\/\/spx.com\/?page_id=5373"},"modified":"2025-09-23T16:10:54","modified_gmt":"2025-09-23T16:10:54","slug":"williamson-thermoflo","status":"publish","type":"page","link":"https:\/\/spx.com\/fr\/our-businesses\/williamson-thermoflo\/","title":{"rendered":"Williamson-Thermoflo"},"content":{"rendered":"

[et_pb_section fb_built=”1″ _builder_version=”4.27.4″ _module_preset=”default” custom_padding=”50px||||false|false” global_colors_info=”{}”][et_pb_row _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”0px||0px||false|false” custom_padding=”0px||0px||false|false” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.4″ _dynamic_attributes=”content” _module_preset=”default” text_font_size=”12px” hover_enabled=”0″ global_colors_info=”{}” sticky_enabled=”0″]@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF90aXRsZSIsInNldHRpbmdzIjp7ImJlZm9yZSI6IjxhIGhyZWY9XCIvXCI+SG9tZTwvYT4gJmd0OyAgPGEgaHJlZj1cIi9vdXItYnVzaW5lc3Nlcy9odmFjXCI+SFZBQzwvYT4gJmd0OyAiLCJhZnRlciI6IiJ9fQ==@[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_2,1_2″ _builder_version=”4.27.4″ _module_preset=”default” custom_padding=”4px||||false|false” global_colors_info=”{}”][et_pb_column type=”1_2″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_post_title meta=”off” featured_image=”off” _builder_version=”4.27.4″ _module_preset=”default” title_font=”–et_global_heading_font|600|||||||” title_text_color=”#004C97″ title_font_size=”64px” custom_margin=”||10px||false|false” custom_padding=”||0px||false|false” title_font_size_tablet=”64px” title_font_size_phone=”54px” title_font_size_last_edited=”on|desktop” global_colors_info=”{}”][\/et_pb_post_title][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” text_font=”–et_global_body_font||||||||” text_text_color=”#4f4f4f” text_font_size=”15px” text_line_height=”1.4em” custom_margin=”||10px||false|false” global_colors_info=”{}”]A long history and a record of reliability have made the Williamson and Thermoflo brand names well known in the heating and air conditioning industry. Today the two names comprise Williamson-Thermoflo, a division of WM Technologies, LLC, which offers a full line of rugged, dependable oil and gas fired cast iron boilers, oil fired furnaces and indirect-fired water heaters. <\/p>\n

Sold through authorized plumbing, heating and HVAC distributors, products from Williamson-Thermoflo are used in numerous residential and light commercial applications throughout North America. Service is available through licensed plumbers, professional HVAC contractors and oil dealers.[\/et_pb_text][et_pb_button button_url=”https:\/\/www.williamson-thermoflo.com\/” url_new_window=”on” button_text=”@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF90aXRsZSIsInNldHRpbmdzIjp7ImJlZm9yZSI6IlZpc2l0ICIsImFmdGVyIjoiIn19@” button_alignment=”left” disabled_on=”on|off|off” _builder_version=”4.27.4″ _dynamic_attributes=”button_text” _module_preset=”default” custom_button=”on” button_text_size=”16px” button_text_color=”#FFFFFF” button_bg_color=”#004C97″ button_border_radius=”6px” background_layout=”dark” global_colors_info=”{}”][\/et_pb_button][\/et_pb_column][et_pb_column type=”1_2″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/spx.com\/wp-content\/uploads\/2025\/08\/WT.jpg” alt=”Williamson Thermoflo Heater” align=”center” _builder_version=”4.27.4″ _module_preset=”default” height=”300px” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||0px||false|false” custom_padding=”||2px||false|false” global_module=”5580″ global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_divider color=”#ececec” _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_divider][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_5,1_5,1_5,1_5,1_5″ use_custom_gutter=”on” gutter_width=”2″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”1_5″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/spx.com\/wp-content\/uploads\/2025\/08\/W-GWC.jpg” alt=”W GWC” title_text=”W GWC” url=”https:\/\/www.williamson-thermoflo.com\/williamson\/products\/gwc-gas-water-condensing\/” url_new_window=”on” show_bottom_space=”off” _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||10px||false|false” custom_margin_tablet=”||10px||false|false” custom_margin_phone=”44px||||false|false” custom_margin_last_edited=”on|phone” border_radii=”off|3px|3px||” global_colors_info=”{}”][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” text_font=”|600|||||||” text_line_height=”1.4em” custom_margin=”||12px|8px|false|false” custom_padding=”|8px|||false|false” global_colors_info=”{}”]GWC \u2013 Gas Water Condensing Boiler[\/et_pb_text][et_pb_divider color=”#F15623″ _builder_version=”4.27.4″ _module_preset=”default” width=”20%” custom_margin=”0px||0px|5px|false|false” custom_padding=”0px||0px||false|false” global_colors_info=”{}”][\/et_pb_divider][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”-6px||5px|8px|false|false” custom_padding=”0px|8px|5px||false|false” global_colors_info=”{}”]<\/p>\n

AFUE\u2019s above 91%<\/p>\n

PVC, CPVC, PP or stainless steel venting<\/p>\n

Cast iron primary heat exchanger<\/p>\n

Stainless steel condensing secondary heat exchanger<\/p>\n

Sealed combustion or direct exhaust venting<\/p>\n

Multiple pass heat exchanger<\/p>\n

Control module with indicator lights<\/p>\n

[\/et_pb_text][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#004C97″ text_line_height=”1.4em” custom_margin=”-6px|||8px|false|false” custom_padding=”0px|8px|5px||false|false” link_option_url=”https:\/\/www.williamson-thermoflo.com\/williamson\/products\/gwc-gas-water-condensing\/” link_option_url_new_window=”on” global_colors_info=”{}”]<\/p>\n

Read more here.<\/p>\n

[\/et_pb_text][\/et_pb_column][et_pb_column type=”1_5″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/spx.com\/wp-content\/uploads\/2025\/08\/W-GWA.jpg” alt=”W GWA” url=”https:\/\/www.williamson-thermoflo.com\/williamson\/products\/gwa-series-3-gas-water-atmospheric\/” url_new_window=”on” show_bottom_space=”off” _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||10px||false|false” custom_margin_tablet=”||10px||false|false” custom_margin_phone=”44px||||false|false” custom_margin_last_edited=”on|phone” border_radii=”off|3px|3px||” global_colors_info=”{}”][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” text_font=”|600|||||||” text_line_height=”1.4em” custom_margin=”||12px|8px|false|false” custom_padding=”|8px|||false|false” global_colors_info=”{}”]GWA \u2013 Series 3 \u2013 Gas Water Atmospheric[\/et_pb_text][et_pb_divider color=”#F15623″ _builder_version=”4.27.4″ _module_preset=”default” width=”20%” custom_margin=”0px||0px|5px|false|false” custom_padding=”0px||0px||false|false” global_colors_info=”{}”][\/et_pb_divider][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” text_line_height=”1.4em” custom_margin=”-6px||5px|8px|false|false” custom_padding=”0px|8px|5px||false|false” global_colors_info=”{}”]38,000 to 233,000 Btuh Input<\/p>\n

Natural or Propane<\/p>\n

Factory tested<\/p>\n

Easy service<\/p>\n

One-piece access door<\/p>\n

All controls in easy reach<\/p>\n

Cast iron sections with built-in air separator<\/p>\n

Insulated heavy-gauge steel jacket<\/p>\n

Low water cut-off[\/et_pb_text][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#004C97″ text_line_height=”1.4em” custom_margin=”-6px|||8px|false|false” custom_padding=”0px|8px|5px||false|false” link_option_url=”https:\/\/www.williamson-thermoflo.com\/williamson\/products\/gwa-series-3-gas-water-atmospheric\/” link_option_url_new_window=”on” global_colors_info=”{}”]<\/p>\n

Read more here.<\/p>\n

[\/et_pb_text][\/et_pb_column][et_pb_column type=”1_5″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/spx.com\/wp-content\/uploads\/2025\/08\/OWT-Tankless.jpg” alt=”OWT Tankless” url=”https:\/\/www.williamson-thermoflo.com\/williamson\/products\/owt-oil-fired-water-boiler-series-3\/” url_new_window=”on” show_bottom_space=”off” _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||10px||false|false” custom_margin_tablet=”||10px||false|false” custom_margin_phone=”44px||||false|false” custom_margin_last_edited=”on|phone” border_radii=”off|3px|3px||” global_colors_info=”{}”][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” text_font=”|600|||||||” text_line_height=”1.4em” custom_margin=”||12px|8px|false|false” custom_padding=”|8px|||false|false” global_colors_info=”{}”]OWT \u2013 Oil-Fired Water Boiler Series 3[\/et_pb_text][et_pb_divider color=”#F15623″ _builder_version=”4.27.4″ _module_preset=”default” width=”20%” custom_margin=”0px||0px|5px|false|false” custom_padding=”0px||0px||false|false” global_colors_info=”{}”][\/et_pb_divider][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” text_line_height=”1.4em” custom_margin=”-6px||5px|8px|false|false” custom_padding=”0px|8px|5px||false|false” global_colors_info=”{}”]Efficiencies 86% \u2013 87% AFUE<\/p>\n

Enhanced control<\/p>\n

Temperature limit control<\/p>\n

LWCO Function<\/p>\n

Thermal pre-purge function<\/p>\n

Rear flue outlet<\/p>\n

Top flue available with optional kit<\/p>\n

Easy service<\/p>\n

Swing-away burner door<\/p>\n

Top access cleanout cover<\/p>\n

Plug-in wiring harness<\/p>\n

High efficiency oil burner<\/p>\n

Solenoid valve<\/p>\n

PSC motor<\/p>\n

Solid state ignitor<\/p>\n

Cast iron sections with built-in air separator<\/p>\n

Insulated heavy-gauge steel jacket[\/et_pb_text][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#004C97″ text_line_height=”1.4em” custom_margin=”-6px|||8px|false|false” custom_padding=”0px|8px|5px||false|false” link_option_url=”https:\/\/www.williamson-thermoflo.com\/williamson\/products\/owt-oil-fired-water-boiler-series-3\/” link_option_url_new_window=”on” global_colors_info=”{}”]<\/p>\n

Read more here.<\/p>\n

[\/et_pb_text][\/et_pb_column][et_pb_column type=”1_5″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/spx.com\/wp-content\/uploads\/2025\/08\/W-Pump.jpg” alt=”W-Pump” url=”https:\/\/www.williamson-thermoflo.com\/williamson\/products\/pmp-packaged-multi-position\/” url_new_window=”on” show_bottom_space=”off” _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||10px||false|false” custom_margin_tablet=”||10px||false|false” custom_margin_phone=”44px||||false|false” custom_margin_last_edited=”on|phone” border_radii=”off|3px|3px||” global_colors_info=”{}”][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” text_font=”|600|||||||” text_line_height=”1.4em” custom_margin=”||12px|8px|false|false” custom_padding=”|8px|||false|false” global_colors_info=”{}”]PMP \u2013 Packaged Multi-Position Oil Furnace[\/et_pb_text][et_pb_divider color=”#F15623″ _builder_version=”4.27.4″ _module_preset=”default” width=”20%” custom_margin=”0px||0px|5px|false|false” custom_padding=”0px||0px||false|false” global_colors_info=”{}”][\/et_pb_divider][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” text_line_height=”1.4em” custom_margin=”-6px||5px|8px|false|false” custom_padding=”0px|8px|5px||false|false” global_colors_info=”{}”]<\/p>\n

AFUE\u2019s to 84.3%<\/p>\n

Multi-position installation \u2013 Up flow (High Boy), Horizontal \u2013 left or right<\/p>\n

Heat exchanger \u2013 Front flue, Heavy gauge stainless steel primary heat exchanger, Tube style aluminized steel secondary heat exchanger with removable baffles. Large front access clean-out secured with studs and nuts, Spring-loaded observation port with test port<\/p>\n

Blower \u2013 Multi-speed direct drive, Slide-out blower\/motor \u2013 easily removed for service<\/p>\n

Cabinet \u2013 Appliance finish powder coat paint, Heavy gauge with \u201cSeal-Tite\u201d construction, Foil-faced insulation for hand-cool surface<\/p>\n

Burner and controls \u2013 Factory-wired, PSC motor, Solid state ignitor<\/p>\n

[\/et_pb_text][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#004C97″ text_line_height=”1.4em” custom_margin=”-6px|||8px|false|false” custom_padding=”0px|8px|5px||false|false” link_option_url=”https:\/\/www.williamson-thermoflo.com\/williamson\/products\/pmp-packaged-multi-position\/” link_option_url_new_window=”on” global_colors_info=”{}”]<\/p>\n

Read more here.<\/p>\n

[\/et_pb_text][\/et_pb_column][et_pb_column type=”1_5″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/spx.com\/wp-content\/uploads\/2025\/08\/T-GL.jpg” alt=”MUH-Pro Series – Bundled Unit Heater” url=”https:\/\/www.williamson-thermoflo.com\/thermoflo\/products\/gl-glass-lined-water-heaters\/” url_new_window=”on” show_bottom_space=”off” _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||10px||false|false” custom_margin_tablet=”||10px||false|false” custom_margin_phone=”44px||||false|false” custom_margin_last_edited=”on|phone” border_radii=”off|3px|3px||” global_colors_info=”{}”][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” text_font=”|600|||||||” text_line_height=”1.4em” custom_margin=”||12px|8px|false|false” custom_padding=”|8px|||false|false” global_colors_info=”{}”]GL \u2013 Glass Lined Water heaters[\/et_pb_text][et_pb_divider color=”#F15623″ _builder_version=”4.27.4″ _module_preset=”default” width=”20%” custom_margin=”0px||0px|5px|false|false” custom_padding=”0px||0px||false|false” global_colors_info=”{}”][\/et_pb_divider][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” text_line_height=”1.4em” custom_margin=”-6px||5px|8px|false|false” custom_padding=”0px|8px|5px||false|false” global_colors_info=”{}”]Inspection opening provides easy access to clean & inspect tank<\/p>\n

2 inches of dense foam insulation, CFC free & environmentally safe<\/p>\n

Adjustable leveling legs<\/p>\n

Low off cycle losses<\/p>\n

Pressure relief valve provided<\/p>\n

Tank & coil are 100% air pressure\/water tested<\/p>\n

Factory installed sacrificial magnesium anode rod[\/et_pb_text][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” text_font=”|600|||||||” text_text_color=”#004C97″ text_line_height=”1.4em” custom_margin=”-6px|||8px|false|false” custom_padding=”0px|8px|5px||false|false” link_option_url=”https:\/\/www.williamson-thermoflo.com\/thermoflo\/products\/gl-glass-lined-water-heaters\/” link_option_url_new_window=”on” global_colors_info=”{}”]<\/p>\n

Read more here.<\/p>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_button button_url=”https:\/\/www.williamson-thermoflo.com\/” url_new_window=”on” button_text=”@ET-DC@eyJkeW5hbWljIjp0cnVlLCJjb250ZW50IjoicG9zdF90aXRsZSIsInNldHRpbmdzIjp7ImJlZm9yZSI6IlZpc2l0ICIsImFmdGVyIjoiIn19@” button_alignment=”center” _builder_version=”4.27.4″ _dynamic_attributes=”button_text” _module_preset=”default” custom_button=”on” button_text_color=”#FFFFFF” button_bg_color=”#004C97″ button_border_radius=”6px” background_layout=”dark” global_colors_info=”{}”][\/et_pb_button][\/et_pb_column][\/et_pb_row][et_pb_row disabled_on=”on|on|on” _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||0px||false|false” custom_padding=”||12px||false|false” disabled=”on” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_divider color=”#ececec” _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][\/et_pb_divider][\/et_pb_column][\/et_pb_row][et_pb_row disabled_on=”on|on|on” _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||0px||false|false” custom_padding=”||0px||false|false” disabled=”on” global_colors_info=”{}”][et_pb_column type=”4_4″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” header_4_text_align=”center” header_4_text_color=”#004C97″ header_4_font_size=”24px” global_colors_info=”{}”]<\/p>\n

Our Brands:<\/h4>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][et_pb_row column_structure=”1_3,1_3,1_3″ disabled_on=”on|on|on” _builder_version=”4.27.4″ _module_preset=”default” disabled=”on” global_colors_info=”{}”][et_pb_column type=”1_3″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/spx.com\/wp-content\/uploads\/2025\/08\/schonstedt.jpg” alt=”MARLEY website logo” title_text=”Print” align=”right” _builder_version=”4.27.4″ _module_preset=”default” module_alignment=”right” height=”40px” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][et_pb_column type=”1_3″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/spx.com\/wp-content\/uploads\/2025\/08\/RADIOlogo-1.png” alt=”Radiodetection Logo” title_text=”RADIOlogo” align=”center” _builder_version=”4.27.4″ _module_preset=”default” module_alignment=”left” height=”40px” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][et_pb_column type=”1_3″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}”][et_pb_image src=”https:\/\/spx.com\/wp-content\/uploads\/2025\/08\/logo1-01.png” alt=”Sensors and Software from Radiodetection” title_text=”Print” _builder_version=”4.27.4″ _module_preset=”default” height=”40px” global_colors_info=”{}”][\/et_pb_image][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"

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