Heating Installation in Studio City, CA

Heat Loss Through Glass Changes the Design

A conventional house loses heat fairly evenly through its envelope, which is why a central system delivering warm air to each room works well enough. A mid-century hillside home with single-glazed floor-to-ceiling windows does not behave that way at all. An enormous proportion of the heat loss is concentrated at the glazing, and it produces a strong downdraught of cold air off the glass surface that pools across the floor.

That is why these houses so often feel cold despite a system that appears adequate on paper. A ceiling register blowing warm air into the middle of a double-height room does very little about a cold current running along the floor from a glass wall twenty feet away. The heating needs to be positioned to counter the loss where it actually occurs, which means low-level delivery at the glazing rather than more capacity from above.

When Replacement Makes Sense

The case for replacing rather than repairing is usually clear:

• Fifteen to Twenty Years of Service: Past that, efficiency and reliability both fall away noticeably.
• Cracked Heat Exchanger: A safety fault that generally condemns a furnace rather than justifying repair.
• Two Significant Repairs in Consecutive Seasons: Normally the end of economical service life.
• A System That Never Warmed the Glass Rooms: Replacement is the opportunity to fix the design, not repeat it.
• Planned Renovation Work: The moment when otherwise impractical options become available.