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Claim This BusinessC V Longo Heating & Air Conditioning has earned a perfect 5-star rating across 6 client reviews in Stamford, Connecticut. The family operated business serves homeowners throughout Fairfield County, including neighboring Norwalk and Darien. Licensed and insured technicians arrive at each service call with fully stocked vehicles, ensuring repairs are completed in a single visit whenever possible.
This contractor distinguishes itself through meticulous job site housekeeping. Multiple reviewers note the crew left work areas cleaner daily than when they arrived, a detail that speaks to professional standards rarely seen in the HVAC trade. The company handles comprehensive heating system replacements including boiler conversion from oil to gas, hot water tank upgrades, and underground oil tank removal requiring soil remediation coordination.
Homeowners who called during heating emergencies speak directly to the team's responsiveness. Harlow Prince praised technician Upul for walking through the entire replacement process step by step, answering every question with patience. Michael Gossett has referred Carmine and his staff to friends for over a decade, calling the service the best he's ever received. Both clients highlight the team's willingness to explain technical details rather than simply completing the work.
All three detailed reviews award 5 stars, with two clients naming specific technicians (Upul and Carmine) as reasons they'd recommend the company. References to boiler and oil tank replacements appear in the most recent review, suggesting these system conversions are a significant portion of current service calls.
| Sunday | Closed |
| Monday | 9 AM–4 PM |
| Tuesday | 9 AM–4 PM |
| Wednesday | 9 AM–4 PM |
| ThursdayToday | 9 AM–4 PM |
| Friday | 9 AM–4 PM |
| Saturday | Closed |
Complete furnace and boiler replacements including new equipment selection, permitting, and installation.
Switching from outdated oil boilers to modern gas systems with proper venting and safety controls.
Removing old tanks and installing new water heaters with code-compliant connections.
Decommissioning and removing underground heating oil tanks, including soil assessment coordination.
AC tune-ups, diagnostics, and repair to restore cooling performance before summer heat.
Scheduled HVAC maintenance to extend equipment lifespan and maintain manufacturer warranties.
Same-day service calls for heating or cooling system failures requiring immediate attention.