Load Calculations

Accurate heating and cooling load calculations ensuring efficient system sizing.

What We Deliver

Our Load Calculations service provides accurate engineering analysis determining heating loads, cooling loads, electrical loads, and domestic water demand for building systems. We perform room-by-room HVAC load calculations following ASHRAE methodology, size equipment appropriately, and optimize system selection. Our electrical load analysis determines service size, panel schedules, and circuit requirements. We calculate plumbing fixture units, hot water demand, and gas loads. Accurate load calculations prevent oversizing (wasting money on unnecessary capacity) and undersizing (causing comfort and performance issues)—ensuring systems are properly sized for efficient, reliable operation throughout building lifecycle.

HVAC load calculations using ASHRAE Manual J/N methodology

Block and room-by-room analysis identifying peak heating and cooling demands

Electrical load calculations determining service size and distribution requirements

Plumbing fixture unit calculations sizing water, waste, and vent systems

Equipment selection and sizing based on calculated loads and project requirements

Documentation supporting permit applications and demonstrating code compliance

Frequently Asked Questions

Why are accurate load calculations important?

Proper calculations ensure systems aren't oversized (wasting capital cost, energy, and space) or undersized (causing comfort issues, equipment failure). Accurate loads enable optimal equipment selection, improve energy efficiency 20-30%, extend equipment life, ensure code compliance, and support permit approval.

What factors influence load calculations?

We consider building orientation, envelope construction (insulation, windows, infiltration), internal loads (occupancy, lighting, equipment), HVAC system type, outdoor design conditions, altitude, occupancy schedules, and diversity factors—creating site-specific, project-accurate load assessments.

Which calculation methods and tools do you use?

We use Carrier HAP, Trane TRACE, Elite CHVAC, ASHRAE methods, and Manual J/S calculations. However, we're not limited to these—our engineers work with any load calculation software, spreadsheets, or methodologies your organization requires, ensuring consistency with your engineering practices.

Do you size all MEP equipment?

Yes. We size HVAC equipment (chillers, boilers, air handlers, VAV boxes), electrical equipment (transformers, switchgear, panels), plumbing equipment (water heaters, pumps, fixtures), and specialty systems—providing complete equipment schedules with capacities, specifications, and selection criteria.

Can you optimize loads for energy efficiency?

Absolutely. We evaluate envelope improvements, daylighting, efficient lighting, plug load reduction, ventilation optimization, heat recovery, and equipment efficiency—identifying strategies reducing loads 15-40% compared to baseline, lowering capital and operating costs while improving sustainability.