4-L Engineering Co. offers a wide array of services in heating, air conditioning, plumbing and mechanical. In every department, we bring an engineering approach with layers of supervision and oversight from managers and highly qualified engineers.
Services
PRIMARY EQUIPMENT
Centrifugal • Screw / Rotary • Absorption • Reciprocating • Packaged Units • Refrigeration • Cryogenic Freezers • Ultra-Low Temp Chambers • Air Compressors
SECONDARY EQUIPMENT
Boilers • Air Handlers • Van Axial Fan • Speed Controls • Coils • Cooling Towers • Pumps • Controls • Air Compressors • Filters • House Pumps
TESTING
Eddy Current Testing • Vibration Analysis • Oil Analysis • Refrigerant Analysis • Lithium Bromide Analysis • Water Analysis • Electrical Analysis • Overload Relay Testing • Thermography • Failure Analysis • Log Analysis • Laser Alignment • Sewer Gas Pressure Monitoring • Building Leakage • Duct Leakage • Plumbing Leakage • Balance Domestic Water System
PLUMBING SERVICES
Repair / Installation • Drain Cleaning • Jetter Services • Camera Inspection / Recording • Line Locaters • Smoke Testing • Backflow Service • Sewage Ejectors • House Pumps • Grade Evaluating • Disinfecting Domestic Water Systems
MECHANICAL SERVICES
Repair / Installation • Pipe Fitting • Welding • Rigging • Sheet Metal • Air/Water Balancing • Carbon Dioxide / Monoxide Control • Refrigerant Planning
ENGINEERING SERVICES
Due Diligence • Load Analysis • Expert Testifying • Energy Star Inspection • Life Expectancy Evaluation • Oncor's Energy Program • Retrofit Design