🔍 Key Concepts

• Manufacturer/installation notes on the illustration around the heater body • Required minimum clearance above deck for safe air circulation and fire protection • Pay attention to any dimension marked from the deck to the bottom of the heater

💭 Think About

• On the right side of the drawing near the unit heater, what dimension is shown between the deck and the heater? • Is the dimension given to the bottom of the heater casing or to some other part like piping or insulation? • How does that specific dimension compare with the answer choices given?

✅ Before You Answer

• Verify the dimension line that is labeled from deck (floor) up to the heater—do not use pipe heights or other equipment • Confirm that the note or arrow specifically refers to the heater mounting height, not coil clearances or trap locations • Match the exact number on that dimension line to the closest option in the choices without rounding