For Box Heaters: Dust and Debris Clearance: Are all heaters clear of dust or debris inside? Connection Integrity: Are any connections inside the box corroded or wires frayed? Flame Strength: Do any heaters have a weak flame? Throttle Valve Setting: Is the throttle valve set correctly for the season? For Tube Heaters: Shield Segments: Is any shield segment disconnected? Emitter Tube Condition: Are there noticeable issues with the emitter tube or hot spots above the heater? Air Intake Hose: Is the fresh air intake hose connected? Exhaust Spout: Is the exhaust spout connected and not leaking? Building: Curtains: Holes or Gaps: Are there any noticeable holes or gaps that need to be fixed? Movement Check: Are the curtains moving freely? Check pulleys, strings, and cables for issues. Curtain Machine Maintenance: Is the curtain machine greased? Curtain Drop Test: Test curtain drop and override thermostat if present. General Building: Insulation Check: Has the attic insulation settled or moved? Look for condensation spots. Gaps Check: Are there gaps around doors, inlets, or wall joints that leak air? Soffit Condition: Are the soffits clear? Snow Doors: Are snow doors closed?
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