This Duo-Therm Whole Home Heater advertisement from the 1940s showcases the efficiency and affordability of America's most popular heaters. The ad features a family enjoying the warmth and comfort provided by the Duo-Therm heater, highlighting its sleek design and advanced heating capabilities. The imagery and text emphasize the product's ability to heat multiple rooms economically, making it an attractive option for homeowners of the era.

• Original 1949 Duo-Therm advertisement
• Measures approximately 8" x 11"
• Features full-size circulating heater with Dual Chamber Burner
• Highlights quick-opening doors for spot radiant heat
• Showcases the heater's ability to provide comfort for up to 5 rooms