06/12/2026
There was a clear and noticeable focus on passive solar designs and applications during the late ‘60s through the early ‘70s. Research into passive heating became very popular as a place where numerous scenarios were developed to absorb and retain the Sun’s heat during the evenings.
What began as a practical design approach in ‘primitive’ cultures where engineering took into account natural convection and basic physics. Heat a rock during the day and enjoy its warmth throughout the night…. A basic need with simple deductive thinking.
Marketing has known that folks are enticed by almost anything espousing “new”. Oil and the subsequent rise of electrical power’s siren song pulled people towards the new ‘convenience’ of active, powered heating systems such as steam, were touted strongly by the market, seeking to acquire a growing base of customers.
Passive heating (and cooling) methods tend to be ‘slow’ and moderate; working tirelessly and continuously with little to no maintenance.
At that time, many of us were seeking escapes or alternative lifestyles to that which was being sold by the utility powers. “Ready Kilowatt” urged people to enter the future in an “all-electric” home. Hundreds of thousands of homes were sold under the description of “Gold Medallion Homes”, an assurance that this home operated exclusively on electrical energy that replaced all of the former methods and their more involved maintenance requirements.
At the tail end of the ‘60s the market was booming pushing new, modern conveniences and appliances that took advantage of the prodigious investments made into energy production. Oil was inexpensive and could power all of our needs.
Some of us saw this as a bait operation designed to sell the ‘benefits’ of modern convenience over the economy and functionality of the passive designs that had been effectively employed for centuries.
This simple box passive heater is a great concept that can be utilized in many ways to enhance the interior environment of our homes. From simple to more complex in design, arrangement and materials used, there are a thousand options between a box and a more complex tromba wall approach in architectural design.
Addition of architectural details that employ this technology should be a standard aspect of any design consideration. Even in these days of readily available direct heating sources, passive enhancements can greatly reduce overall operational costs of heating a home at no additional cost other than the details installed.
Can you think of how this approach might be used in contemporary residential building design?