SG Heating & Air Conditioning LLC
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About SG Heating & Air Conditioning LLC
SG Heating & Air Conditioning LLC is a residential HVAC contractor serving Central New Jersey and Bucks County, Pennsylvania, including Princeton, West Windsor, Hamilton, Cranbury, Millstone, Yardley, and Morrisville. The company operates under multiple licenses spanning heating, plumbing, and electrical work, and maintains a 4.9-star average across 175 verified client reviews. With a parent company supporting affiliated divisions including SG Plumbing LLP and SG Electrical LLC, the contractor offers coordinated multi-trade project management for homeowners undertaking comprehensive system upgrades or renovations.
What distinguishes this contractor from regional competitors is the breadth of in-house capabilities paired with round-the-clock availability. The team provides heating, cooling, plumbing, electrical, generator installation, and home performance auditing under a single contact point, a structure that eliminates the coordination burden typically imposed on homeowners managing multiple subcontractors. The company maintains 24-hour emergency service with transparent diagnostic communication, and offers free second opinions to help homeowners evaluate repair versus replacement decisions without pressure.
Customer feedback reveals consistent patterns of rapid response, detailed explanation, and respectful worksite conduct. Technician Antonio received specific praise for arriving within an hour of a distress call during freezing weather and delivering a same-day repair after a home warranty company had stalled for five weeks. Other reviewers described the team as punctual, knowledgeable, and thorough in explaining equipment options ranging from furnace and AC replacements to smart thermostat integrations. Multiple clients noted crews worked efficiently despite challenging conditions including winter storms.
What Customers Say
Every reviewer awarded 5 stars, with seven clients specifically praising technician Antonio for same-day arrivals and detailed explanations. Three reviewers highlighted the company stepping in after competitors or warranty companies failed to deliver, describing SG as responsive, punctual, and knowledgeable. Communication quality and clean worksite practices appeared in four separate reviews.
Working Hours
| Sunday | Open 24 hours |
| Monday | Open 24 hours |
| Tuesday | Open 24 hours |
| WednesdayToday | Open 24 hours |
| Thursday | Open 24 hours |
| Friday | Open 24 hours |
| Saturday | Open 24 hours |
Services
Heating Repair & Installation
Furnace repair, boiler service, and new heating system installation using current equipment and diagnostic tools.
Cooling & AC Services
Air conditioning repair, replacement, and preventive maintenance to maintain cooling performance and extend equipment life.
Plumbing Services
Water heater replacement, fixture repair, and general plumbing maintenance delivered through affiliated SG Plumbing LLP.
Electrical Services
Panel upgrades, wiring, and electrical repairs provided by licensed SG Electrical LLC technicians.
Generator Installation
Whole-home generator sizing, installation, and setup for backup power reliability.
Home Performance Auditing
Energy assessment services identifying efficiency opportunities and comfort issues throughout the home envelope.
24-Hour Emergency Service
Round-the-clock urgent response for heating failures, cooling outages, and othersystem emergencies.
Maintenance Agreements
Scheduled preventive maintenance contracts designed to extend HVAC system lifespan and reduce unexpected repair costs.