Mann-In, Inc.

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About Mann-In, Inc.
Mann-In, Inc. operates as an HVAC contractor serving the Chantilly and Herndon communities in Northern Virginia. The business holds a 4.8-star rating accumulated across 104 customer reviews, reflecting consistent service quality over nearly two decades of operation. Their service fleet handles residential heating and cooling equipment throughout this corridor of Fairfax County, responding to both scheduled maintenance requests and urgent breakdown calls.
The company positions itself as a Carrier dealer, offering new system installations alongside repair services for existing equipment. Beyond traditional forced-air heating and cooling, Mann-In installs ductless mini-split configurations, heat pumps, water heaters, and indoor air quality components including air filtration, humidification, and ultraviolet purification systems. Their financing options provide flexibility for homeowners facing unexpected equipment replacement, while twice-yearly service plans aim to extend system longevity through preventive maintenance.
Customer reviews document specific positive encounters with technicians named in feedback. One reviewer detailed how Colt arrived promptly during a heat wave when indoor temperatures reached 85 degrees, diagnosing a failed fan motor and completing repairs within two days at reasonable cost. Another customer praised sales representative Aaron for providing a detailed quote that included a necessary liquid line upgrade from an aging R-22 system. Install crew members Dan and Trevor received recognition for thorough, on-time work that included communication throughout the project.
What Customers Say
Four of five published reviews award five stars, citing specific technicians by name and detailed installation experiences. The sole one-star review describes failed communication attempts over a heating issue, suggesting inconsistent follow-through on scheduled appointments. Positive feedback emphasizes prompt same-day dispatch and transparent pricing, while the negative review focuses exclusively on responsiveness failures.
Working Hours
| Sunday | Closed |
| Monday | 7 AM–4 PM |
| Tuesday | 7 AM–4 PM |
| Wednesday | 7 AM–4 PM |
| Thursday | 7 AM–4 PM |
| Friday | 7 AM–4 PM |
| SaturdayToday | Closed |
Services
Air Conditioning Installation & Repair
Carrier brand AC installations and fix services for broken cooling equipment, with same-day emergency dispatch available.
Heating System Services
Furnace and heat pump installations, repair work, and heating system maintenance for residential homes.
Ductless Mini-Split Systems
Custom mini-split installations providing independent heating and cooling zones for specific rooms without ductwork.
Water Heater Installation
Installation of water heating equipment to ensure reliable hot water supply throughout the home.
Indoor Air Quality Solutions
Air filtration, humidifiers, and ultraviolet purification systems designed to improve residential air cleanliness.
Preventive Maintenance Plans
Twice-yearly service agreements that inspect systems for developing issues and extend equipment lifespan.