Home Inspector Test Study Guide 2026

Solid fuel heating systems generate heat by burning solid materials such as wood (e.g., woodstoves, fireplaces) or coal (e.g., coal furnaces). An electric heater, in contrast, operates by converting electrical energy directly into heat through resistance. Therefore, an electric heater does not use solid fuel and belongs to a different category of heating systems.

Home inspectors check for heat exchanger cracks by observing flame deflection when the blower starts, noting odors at registers, and using a combustion gas detector — not by disassembly.

Residential building codes typically require a minimum of 6 feet 8 inches of headroom measured vertically from the stair nosing to any obstruction above.

Moss holds moisture against the roof surface, accelerating the breakdown of shingle granules and potentially causing wood rot in the underlying deck.

The flame sensor sends a signal proving ignition; if it fails to sense a flame within a set period, the control board shuts off the gas valve to prevent unburned gas accumulation.

A material defect is defined by its impact on safety, habitability, or property value — not simply by repair cost or visibility.