- Heating
- Ventilation
- Air Conditioning
- Indoor Air Quality
- Monitoring & Analysis on Boiler Conversions and Replacements
- Natural Gas & Propane Systems
- Industrial Ventilation Systems
- Steam Systems
- Oil Systems
- Compressed Air Systems
- Energy Studies
- Direct Digital Controls for Building Automation
- Energy Recovery Systems
- Geo-Thermal Ground Source Heating Systems
- Septic Systems
- Sewer and Water Systems
- Kitchen / Restaurant Ventilation
- Gasoline & Diesel Storage & Dispensing
- Cogeneration