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Claim This BusinessKeystone HVAC Inc operates as a locally owned heating and cooling contractor in Northampton, Pennsylvania, delivering round-the-clock service across the Lehigh Valley region. The company maintains a 4.6-star rating derived from 22 verified client reviews, reflecting consistent performance in both residential new installations and emergency repairs. Owner Hussain directly manages service calls, ensuring accountability from initial diagnosis through final inspection.
What distinguishes Keystone HVAC from regional competitors is their commitment to completing full system replacements within tight timeframes. Reviewers document furnace and indirect water heater installations completed within three days of first consultation, a critical advantage during temperature emergencies. The team handles aging equipment concerns with clarity, explaining diagnostic findings and presenting multiple resolution pathways rather than defaulting to immediate replacement recommendations.
Customer narratives highlight specific technicians and resolution scenarios. David Hodes described Hussain responding to a heating pressure emergency the same day, conducting measurements and outlining replacement options before completing a full furnace and hot water heater installation three days later. Rajender Totlani noted technicians Dan and Munir meticulously verifying all connections, assisting with warranty registration and manufacturer rebate paperwork. These accounts demonstrate the company's capacity to manage complex retrofits while maintaining project timelines.
All seven published reviews award five stars, with three clients specifically praising same-day or next-day response during heating emergencies. Two reviewers highlight equipment installed over twenty years ago still functioning, indicating long-term parts quality and workmanship. Five-star reviews uniformly describe the owner directly overseeing projects and technicians explicitly verifying system performance post-installation.
| Sunday | Open 24 hours |
| Monday | Open 24 hours |
| Tuesday | Open 24 hours |
| Wednesday | Open 24 hours |
| ThursdayToday | Open 24 hours |
| Friday | Open 24 hours |
| Saturday | Open 24 hours |
Complete forced-air heating system installation including new setup, thermostat wiring, and post-installation performance verification.
Residential steam boiler replacement and heating coil maintenance for older radiator-based heating systems.
Indirect hot water heater installation integrated with existing or new heating system infrastructure.
Pressure gauge evaluation, combustion efficiency analysis, and detailed repair option presentations.
24/7 availability for heating system failures with same-day response and rapid parts ordering.
Seasonal heating system inspection, filter replacement, and performance optimization services.