Commercial HVAC (H02)
Commercial HVAC systems are more complex than residential – serving multiple zones, managing ventilation for occupancy, and requiring redundancy to prevent business disruption.
This BidScope guides you through commercial systems: rooftop units (RTUs – packaged heating and cooling, most common commercial), split systems (remote condensers), variable refrigerant flow (VRF – highly efficient, zone control), chillers for large buildings, and boilers for heating.
Learn system selection by application: office buildings (VAV for zone control, dedicated outside air), retail spaces (constant volume, quick response), restaurants (heavy ventilation for cooking, makeup air), warehouses (destratification fans, spot heating/cooling), and multi-family (individual units or centralized).
Understand sizing complexity: occupancy loads (people generate heat), equipment loads (computers, machinery, cooking), ventilation requirements (outdoor air per person per code), diversity factors (not all zones peak simultaneously).
Master distribution systems: ductwork (supply, return, outside air), VAV boxes for zone control, terminal units (fan-coil, induction), hydronic piping for chilled water or hot water.
Navigate controls: building automation systems (BAS), DDC (direct digital control), zone sensors and thermostats, scheduling based on occupancy, demand-controlled ventilation (DCV) based on CO2.
Learn efficiency standards: ASHRAE 90.1 energy standard, economizers for free cooling with outside air, heat recovery (energy recovery ventilators), variable speed drives for fans and pumps.
Understand maintenance requirements: quarterly preventive maintenance typical, filter changes more frequent than residential, belt and bearing lubrication, refrigerant leak detection, water treatment for chillers.
Navigate code requirements: mechanical code (IMC), energy code, ventilation rates (ASHRAE 62.1), refrigeration safety.
Know when equipment replacement makes sense versus ongoing repairs.
Calculate total cost of ownership including energy.
Budget for commercial scale: small RTU $8,000-15,000 installed, large rooftop unit $25,000-75,000+, VRF systems $15-30 per square foot, chillers $500-1,500+ per ton.
This tool ensures commercial HVAC systems meet business needs reliably and efficiently.
What’s Included:
- Commercial HVAC system types (RTUs, split systems, VRF, chillers, boilers)
- Rooftop units (RTUs, packaged heating/cooling, common commercial)
- RTU tonnage (3-50 tons typical commercial)
- Split systems (remote condensers, flexibility)
- Variable refrigerant flow (VRF, highly efficient, zone control)
- VRF benefits (energy efficiency, simultaneous heating/cooling)
- Chillers (large buildings, centralized cooling)
- Chiller types (air-cooled, water-cooled)
- Boilers for commercial heating (hot water, steam)
- System selection by application
- Office buildings (VAV, outside air, zone control)
- Retail spaces (constant volume, quick response, customer comfort)
- Restaurants (heavy ventilation, makeup air, grease exhaust)
- Warehouses (destratification, spot heating/cooling, high ceilings)
- Multi-family buildings (individual units vs centralized)
- Sizing commercial loads (occupancy, equipment, ventilation, diversity)
- Occupancy loads (people generate heat, CO2)
- Equipment loads (computers, machinery, process equipment)
- Ventilation requirements (outdoor air per person, ASHRAE 62.1)
- Diversity factors (zones don’t peak simultaneously)
- Distribution systems (ductwork, VAV, terminal units, hydronic)
- Supply and return ductwork sizing
- Variable air volume (VAV) boxes for zone control
- Constant air volume (CAV) systems
- Terminal units (fan-coil units, induction units)
- Hydronic piping (chilled water, hot water distribution)
- Building automation systems (BAS) and controls
- Direct digital control (DDC)
- Zone sensors and thermostats
- Scheduling based on occupancy
- Demand-controlled ventilation (DCV with CO2 sensors)
- Economizers for free cooling
- Heat recovery systems (energy recovery ventilators)
- Efficiency standards (ASHRAE 90.1, energy code)
- Variable speed drives (VFDs) for fans and pumps
- High-efficiency equipment selection
- ENERGY STAR certification
- Maintenance requirements (PM quarterly, filters, belts, refrigerant)
- Preventive maintenance programs
- Filter changes (monthly to quarterly)
- Belt and bearing maintenance
- Refrigerant leak detection and repair
- Water treatment for chillers and cooling towers
- Code requirements (IMC, ASHRAE, refrigeration safety)
- Ventilation rate requirements
- Refrigerant regulations and safety
- Equipment replacement decisions
- Total cost of ownership (capital + energy + maintenance)
- Energy audits and efficiency upgrades
- Cost factors ($8,000-15,000 small RTU, $25,000-75,000+ large RTU, $15-30/sf VRF, $500-1,500/ton chillers)
- Finding qualified commercial HVAC contractors
- Design-build vs design-bid-build
- Commissioning for new systems
