---
title: How Often Should Preventive Maintenance Be Done?
description: Learn how often commercial HVAC preventative maintenance should be done. Harold Brothers explains bi annual, quarterly & monthly PM schedules for buildings
---

[Harold Brothers Answers ](https://www.haroldbros.com/harold-brothers-answers)

# [How Often Should Preventive Maintenance Be Done?](https://www.haroldbros.com/harold-brothers-answers/preventive-maintenance-schedule-faq)

 Written by [Bethany sousa](https://www.haroldbros.com/harold-brothers-answers/author/bethany-sousa) | Dec 30, 2025 4:59:59 AM

## How often should HVAC preventative maintenance be performed?

Harold Brothers typically recommends service [bi annual maintenance for commercial buildings, quarterly HVAC preventative maintenance](https://www.haroldbros.com/blog/how-often-commercial-hvac-preventative-maintenance-be-done-massachusetts), or even monthly HVAC maintenance for high demand facilities depending on the building size and system load.

## What should be included during each maintenance visit?

A visit usually includes filter changes, coil cleaning, refrigerant checks, electrical testing, and system calibration. To see what this looks like step by step, review [what happens during a preventative maintenance visit](https://www.haroldbros.com/blog/commercial-hvac-preventative-maintenance-visit).

## What determines how often PM should be done?

Harold Brothers bases the schedule on building size, equipment type, age of the system, and how heavily the facility relies on heating or cooling. 

## Why is a consistent PM schedule important?

Regular maintenance prevents breakdowns, reduces energy waste, and helps equipment last longer. You can learn more about the financial impact in [commercial HVAC preventative maintenance cost.](https://www.haroldbros.com/blog/commercial-hvac-preventative-maintenance-cost)

## Where can I learn more about Harold Brothers’ PM services?

If you want to explore service plans or schedule a walkthrough, visit [Harold Brothers preventative maintenance services.](https://www.haroldbros.com/services/preventative-maintenance)

 

 

[View full post](https://www.haroldbros.com/harold-brothers-answers/preventive-maintenance-schedule-faq)

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