# Mallick Mechanical Services: HVAC System Replacement \& Service in Gaithersburg, MD \& DC

> Trusted HVAC services in Gaithersburg, MD for homes and businesses\. Expert installation, repair, and maintenance since 1994\.

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## Pages
- [Air Conditioning Replacement](https://mallickmechanical.com/air-conditioning-replacement/)
- [Tenant Fit\-Outs](https://mallickmechanical.com/tenant-fit-outs/)
- [Mission Critical](https://mallickmechanical.com/mission-critical/)
- [Air Conditioning Repair](https://mallickmechanical.com/air-conditioning-repair/)
- [Commercial Installer](https://mallickmechanical.com/commercial-hvac-installer/)

## Posts
- [5 Reasons to Upgrade to a Heat Pump](https://mallickmechanical.com/2026/07/5-reasons-to-upgrade-to-a-heat-pump/):  
- [Myths vs\. Facts: Air Conditioning](https://mallickmechanical.com/2026/05/air-conditioning-myths-vs-facts/): Let's Break Down The Answers to Common Questions We Receive
- [Everything You Need to Know About Mallick Mechanical Services](https://mallickmechanical.com/2026/05/mallick-mechanical-hvac-overview/): Get to Know Your Gaithersburg HVAC Experts
- [6 Signs It’s Time to Replace Your Home's Heating System](https://mallickmechanical.com/2025/11/heating-replacement-warning-signs-gaithersburg-md/): \(Before It's Too Late\)
- [AC Not Working? Here's What to do Next](https://mallickmechanical.com/2026/03/ac-not-working-heres-what-to-do-next/): 5 Easy Steps Before Calling a Professional

## Portfolio
- [Enhancing Energy Efficiency at American University](https://mallickmechanical.com/portfolio/american-university/): In one of its most complex projects to date, Mallick Mechanical served as the general contractor for American University’s transition from a steam system to a low\-temperature hot water system, replacing aging boilers with high\-efficiency condensing units, hydronic pumps, chillers, and a cogeneration system—enhancing energy efficiency, reducing carbon emissions by 50%, and modernizing campus heating infrastructure over two phased installations\.
- [Georgetown Day School](https://mallickmechanical.com/portfolio/georgetown/)
- [Reston Row District](https://mallickmechanical.com/portfolio/reston-row/)
- [Ryan Floors](https://mallickmechanical.com/portfolio/ryan-floor/)

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- [Sitemap index](https://mallickmechanical.com/sitemap_index.xml)