Humphrey Radiantfire No. 31 Value Guide

The Humphrey Radiantfire No. 31 is a hallmark of early 20th-century American engineering, developed by the General Gas Light Company to mimic the warmth of coal fires. Its combination of ornate cast iron scrollwork and innovative ceramic radiant bricks makes it a highly sought-after piece for industrial-era collectors.

What Is Humphrey Radiantfire No. 31 Worth?

The typical price range for Humphrey Radiantfire No. 31 is $115 - $125 based on recent sales. However, values can vary depending on the item's condition, rarity, and other factors such as:

• The physical condition of the cast iron, specifically the absence of cracks or heavy oxidation, significantly impacts the $115-$125 price range.
• The completeness of the ceramic radiant interior, as these fragile components are often damaged or missing.
• The preservation of original brass components and the clarity of the decorative scrollwork details.
• Market demand for early 20th-century American industrial heating technology and Michigan-made antiques.

How to Identify Humphrey Radiantfire No. 31?

• Look for the 'Humphrey Radiantfire' branding and the specific 'No. 31' model designation cast into the metal frame.
• Verify the presence of the original ceramic radiant bricks, which are designed to fit into the interior slots.
• Examine the heavy cast iron construction and brass fittings typical of the 1915-1925 manufacturing period.
• Check for the distinctive ornate scrollwork patterns that characterize the Kalamazoo-produced units.

History of Humphrey Radiantfire No. 31

Developed by the General Gas Light Company of Kalamazoo, Michigan, the Humphrey Radiantfire revolutionized home heating in the early 20th century. Unlike earlier heaters that simply warmed the air, these used ceramic 'radiants' to project heat directly into the room, mimicking the warmth of a coal fire without the soot or labor.