Makeup Air Unit Seasonal Service Report
Seasonal service report for makeup air units that documents burner condition, gas pressure, airflow, exhaust balance, and freeze stat performance. Use it to catch seasonal defects before they become comfort, safety, or shutdown issues.
Trusted by frontline teams 15 years of frontline software AI customization in seconds
Built for: Warehousing And Distribution · Manufacturing · Commercial Kitchens · Retail And Mixed Use Buildings
Overview
This template is a seasonal service report for makeup air units, built to document the checks that matter most when an MAU is brought into or out of seasonal operation. It walks the technician through unit identification and safe access, burner and combustion components, gas pressure and gas train condition, airflow and exhaust balance, and freeze stat and control verification. The structure matches the way a service tech actually works the unit, so the final record shows what was inspected, what was measured, and what needs correction.
Use it when the unit is being prepared for heating season, after a long idle period, after burner or airflow maintenance, or any time the site needs a defensible service record for a critical ventilation asset. It is especially useful where the MAU supports building pressure control, makeup air for exhaust systems, or freeze protection in cold weather. The report helps capture deficiencies such as dirty burners, unstable gas pressure, weak airflow, belt wear, or a freeze stat that does not trip and reset properly.
Do not use this as a substitute for a full commissioning report, a combustion analysis package, or a major repair work order. If the unit has active gas leaks, repeated flame failures, structural damage, or control faults that prevent safe operation, the inspection should stop and the issue should be escalated. The template is designed to document seasonal service and surface actionable findings, not to replace manufacturer procedures or site-specific safety requirements.
Standards & compliance context
- The template supports documentation practices consistent with OSHA general industry requirements for safe maintenance, hazard control, and lockout-tagout.
- Burner, gas train, and combustion checks align with common NFPA fire and fuel gas safety expectations for heating equipment.
- Freeze protection and control verification help document seasonal readiness for occupied spaces where loss of heat or ventilation could create a safety issue.
- If the MAU serves a regulated area, local code, the AHJ, manufacturer instructions, and site procedures may require additional testing or sign-off.
- This report is not a substitute for a formal combustion analysis, commissioning record, or permit-required repair procedure when a critical defect is found.
General regulatory context for orientation only — verify current requirements with counsel or the relevant agency before relying on this template for compliance.
What's inside this template
Inspection Setup and Unit Identification
This section confirms the right unit is being serviced safely before any internal access or testing begins.
-
Unit identification verified
Record the MAU asset tag, location, and unit nameplate information.
-
Service area accessible and free of obstructions
Access panels, roof access, and work area are clear for safe inspection.
-
Lockout-tagout applied before internal inspection
Verify equipment is isolated and secured per site LOTO procedure before opening panels or touching internal components.
-
Inspector name and service date recorded
Document who performed the service and when it was completed.
-
Required PPE used
Confirm appropriate PPE was worn for the task, such as gloves, eye protection, and fall protection if applicable.
Burner and Combustion Components
This section checks the combustion side of the MAU for cleanliness, damage, and clear airflow paths that affect ignition and safe operation.
-
Burner assembly clean and free of visible damage
Check burners for corrosion, soot buildup, distortion, loose mounting, or signs of flame impingement.
-
Ignition components secure and serviceable
Verify igniter, pilot components, and flame-sensing parts are properly mounted and not visibly damaged.
-
Combustion air openings unobstructed
Confirm combustion air intake paths are clear and not blocked by debris, ice, or nesting material.
-
Flue or exhaust path visually clear
Inspect venting path for visible blockage, deterioration, or disconnected sections.
-
Burner compartment cleaned as needed
Document whether dust, debris, or residue was removed from the burner compartment during service.
Gas Pressure and Fuel Train
This section captures the fuel delivery readings and leak checks that determine whether the burner can operate within the expected range.
-
Incoming gas pressure measured
Record the inlet gas pressure at the unit during service.
-
Manifold gas pressure measured
Record the manifold pressure and compare it to the unit nameplate or manufacturer requirements.
-
Gas train fittings free of leaks
Check accessible gas train connections, valves, and fittings for evidence of leakage using approved leak detection methods.
-
Gas shutoff valve accessible and labeled
Verify the manual shutoff valve is accessible, identified, and operable.
Airflow and Exhaust Balance
This section verifies that the unit is moving the right amount of air and that belts, pulleys, and filters are not limiting performance.
-
Supply airflow measured
Record the delivered supply airflow for the MAU.
-
Supply airflow within target range
Confirm measured supply airflow is within the project or TAB target range.
-
Exhaust balance verified
Confirm exhaust airflow is balanced relative to supply requirements and building operating conditions.
-
Belts and pulleys in good condition
Inspect belts for wear, tension, alignment, and visible cracking; verify pulleys are secure.
-
Filters clean or replaced
Document filter condition and whether filters were cleaned or replaced during service.
Controls and Freeze Stat Function Test
This section confirms the control system and freeze protection respond correctly before the unit is returned to seasonal service.
-
Freeze stat function test completed
Simulate or verify freeze stat operation per site procedure and document the response.
-
Freeze stat trips and resets properly
Confirm the freeze stat initiates the intended safety response and resets correctly after test.
-
Control panel free of active alarms or faults
Check the unit controller for active alarms, fault codes, or abnormal indications.
-
Safety controls operational
Verify applicable safeties such as high limit, airflow proving, and interlocks operate as intended.
How to use this template
- Start by confirming the unit ID, service area access, lockout-tagout status, inspector name, date, and required PPE before opening any access panels.
- Inspect the burner compartment, combustion openings, and flue path, then clean visible debris and record any damage, corrosion, or restricted airflow conditions.
- Measure incoming gas pressure and manifold gas pressure, check gas train fittings for leaks, and verify the shutoff valve is accessible and labeled.
- Measure supply airflow, confirm it is within the site target range, verify exhaust balance, and document belt, pulley, and filter condition.
- Test the freeze stat and related safety controls, confirm trip and reset behavior, and note any alarms, faults, or corrective actions needed.
- Review all findings, assign follow-up work for deficiencies, and save the completed report with photos, readings, and technician sign-off.
Best practices
- Record actual pressure, airflow, and balance readings instead of writing only 'pass' or 'OK'.
- Apply lockout-tagout before opening the unit and document it in the report before any internal inspection begins.
- Photograph burner condition, gas train defects, belt wear, and any freeze stat or control faults at the time they are found.
- Compare measured gas pressure and airflow to the unit nameplate, manufacturer data, and site target ranges before clearing the unit.
- Treat a failed freeze stat test as a service-stopping deficiency until the control is verified and reset correctly.
- Check filters, belts, and pulleys in the same visit so airflow problems are not mistaken for burner or control issues.
- Note any recurring defects from prior seasonal reports so trend patterns are visible to maintenance and supervision.
What this template typically catches
Issues teams running this template most often surface in practice:
Common use cases
Frequently asked questions
What does this makeup air unit seasonal service report cover?
It covers the core seasonal checks that keep a makeup air unit operating safely and at the intended airflow: unit identification, lockout-tagout, burner and combustion components, gas pressure, gas train condition, supply and exhaust balance, and freeze stat operation. It is designed to produce a service record with measurable findings and maintenance notes, not just a pass/fail checklist. If your MAU includes additional items such as economizers, VFDs, or building automation points, you can add those sections.
When should this template be used?
Use it at seasonal changeover, before heating season, after long idle periods, or whenever the MAU has shown combustion, airflow, or freeze-protection issues. It is also useful after filter changes, belt service, burner cleaning, or gas train work to confirm the unit is back in service correctly. If the unit is under active repair or has a major safety defect, use a corrective maintenance work order in addition to this report.
Who should complete the inspection?
A qualified HVAC technician, maintenance mechanic, or service contractor should complete it, with a competent person assigned to verify lockout-tagout and safe access. Gas pressure readings, burner checks, and freeze stat testing should be performed by personnel trained on the specific unit and local code requirements. If your site has a facilities manager or EHS reviewer, they can sign off on the completed report after the service visit.
Does this template satisfy OSHA or other compliance requirements?
It supports documentation aligned with OSHA general industry expectations for safe maintenance, lockout-tagout, and hazard control, but it is not a substitute for a site-specific compliance program. For combustion equipment, it also helps document maintenance practices consistent with NFPA fire and fuel gas safety expectations. If the MAU serves a foodservice, healthcare, or regulated process area, you may need additional checks tied to local code, the AHJ, or facility standards.
What are the most common mistakes when using this report?
The biggest mistake is recording only 'OK' without the actual measured values for gas pressure, airflow, or balance. Another common issue is skipping lockout-tagout or documenting it after the inspection instead of before internal access. Teams also miss freeze stat reset verification, which can hide a control problem until the next cold snap.
Can I customize this for my equipment and site standards?
Yes. You can add fields for unit model, serial number, burner type, filter size, belt part numbers, BAS point names, and your target airflow or pressure ranges. Many teams also add a corrective action section, photo upload fields, and a signature block for the technician and reviewer. If your site has multiple MAU types, clone the template and create a version for each standard configuration.
How often should a makeup air unit seasonal service report be completed?
Most sites use it once before heating season and again before cooling or shoulder-season operation if the unit changes modes significantly. Units in harsh environments, high-use facilities, or locations with freeze risk may need more frequent checks or a mid-season follow-up. The right cadence depends on runtime, exposure, and how critical the unit is to occupied-space ventilation and pressure control.
How does this compare with an ad hoc service note or work order?
An ad hoc note usually captures only the immediate repair, while this template creates a repeatable seasonal record of the unit's condition and performance. That makes it easier to spot recurring deficiencies like drifting gas pressure, dirty burners, belt wear, or weak freeze protection. It also gives supervisors a consistent record for trend review, warranty discussions, and follow-up maintenance planning.
Related templates
Go deeper on the topic
-
A daily huddle is a brief (10–15 minute) standing meeting held at the start of a shift or workday to align the team on priorities, surface issues, and...
-
A deskless worker is any employee whose job happens without a desk, a company laptop, or a fixed workstation. They're roughly 80% of the global workforce —...
-
A frontline employee app is a phone-first application that gives hourly, field, and deskless workers access to their schedule, pay, announcements, training,...
-
A frontline worker is any employee whose job happens away from a desk — on a production floor, in a patient room, behind a store counter, in a customer's...
-
Learn how nonprofit tracking of KPIs, donations, and operational workflows reduces turnover and improves decision-making with the right knowledge management...
-
Spring '26 adds real-time Google & Outlook calendar sync, Google Workspace file creation in Files, upgraded Messenger, and expanded mobile parity.
-
See how MangoApps Forms helps teams collect, track, and analyze employee data in real time — with mobile access, file uploads, and enterprise-grade security.
-
MangoApps AI agents now take action across 21 apps—approving leave, advancing candidates, managing schedules—not just surfacing recommendations.
Ready to use this template?
Get started with MangoApps and use Makeup Air Unit Seasonal Service Report with your team — pricing built for small business.
