Free checklist
Unit heater quarterly maintenance checklist
A quarterly unit heater round is short on purpose: it catches the wear items that fail between annual services. This checklist is sized for a tech with a phone. Every item says what to look at and the photo that proves the round happened. Work is commonly verified against IMC, manufacturer's published instructions. Confirm the edition your authority having jurisdiction has adopted.
- Items
- 6
- Photos required
- 9
- Built for
- Subcontractors
Who runs it
The HVAC or facilities tech on the quarterly round through the warehouse and mechanical spaces.
When in the schedule
Every quarter, with a pass just before the heating season so a dead unit heater is found before the space it serves freezes.
The checklist
Every item, and the photo that proves it
The photo count on each row is what RTI would require before the item can be submitted. Copy the list as is, or load it into RTI and let the gate enforce it.
Heat and air delivery
- 2 photos
Heat proven by calling the unit on
Thermostat driven up, gas unit lights or hydronic valve opens, warm air felt at the discharge louvers within the normal delay.
- 1 photo
Discharge louvers aimed and unobstructed
Louvers set to throw the air where it's needed, nothing hung or stacked in front of the discharge.
Fan and mounting
- 1 photo
Fan and motor run checked
Propeller or blower turns freely and quietly, motor not overheating, guard in place and clear of debris.
- 2 photos
Hangers, rods and brackets checked for movement
Suspension hardware tight, no swaying or vibration walking the unit, isolators intact where fitted.
Clearances and controls
- 2 photos
Clearance to storage and combustibles maintained
Required clearances kept below and around the unit, no pallets, boxes or racking encroaching on the heater or its vent.
- 1 photo
Thermostat response verified
Unit starts and stops on the thermostat call, setpoint matches what the space needs, no unit left running against a dead stat.
What usually sends this back
The failures are almost always the evidence, not the work
- Pallets and racking crept in under the unit heater over the season, so the required clearance to combustibles is gone and the throw is blocked.
- Fan runs but no heat because a gas unit locked out on a fault or a hydronic zone valve stayed shut, and nobody stood under it to feel the discharge.
- Unit humming and walking on its hangers from a worn bearing or loose rod, dismissed as normal warehouse noise.
Run it with the Photo Gate
A checklist nobody can submit half-finished
Load this list into RTI, stick a QR tag on the area it covers, and the submit button stays locked until every mandatory item is answered and the 9 required photos exist. Approved walks roll into a branded turnover package with a tamper-evident record behind every line.
Submission state
The gate is enforced on the server, so it holds even if the phone is offline when the walk happens.
Verified against
Common questions
- What does this unit heater quarterly checklist cover?
- 6 items across 3 sections, covering heat and air delivery, fan and mounting, clearances and controls. Each item spells out what the person walking the job is actually looking for, not just a box to tick.
- Who should run this inspection?
- The HVAC or facilities tech on the quarterly round through the warehouse and mechanical spaces.
- When in the schedule should this walk happen?
- Every quarter, with a pass just before the heating season so a dead unit heater is found before the space it serves freezes.
- Why does every item ask for a photo?
- 9 of the 6 items call for photo evidence. A checklist answer without the photo is a claim; the photo is what makes the record worth something in a dispute and lets a reviewer approve work without re-walking the job.
- What most often fails a unit heater quarterly inspection?
- Pallets and racking crept in under the unit heater over the season, so the required clearance to combustibles is gone and the throw is blocked. Fan runs but no heat because a gas unit locked out on a fault or a hydronic zone valve stayed shut, and nobody stood under it to feel the discharge. Unit humming and walking on its hangers from a worn bearing or loose rod, dismissed as normal warehouse noise.
- Can I use this checklist in RTI?
- Yes. Start a free RTI workspace, build this list as a checklist, and the Photo Gate holds the submit button until every mandatory item is answered and its photos are attached. Approved inspections roll into a branded turnover package with a tamper-evident audit trail.
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