HVAC Load Calculation Analyzer
Calculate HVAC heating/cooling loads with equipment sizing and code compliance
What You Can Do
Process building data through a structured analytical framework to develop defensible heating and cooling load estimates that meet ASHRAE and ACCA standards. You'll generate equipment sizing recommendations (furnace, AC, heat pump, boiler capacity), calculate ductwork and diffuser requirements, and produce documentation suitable for permit submissions and contractor bids. The skill handles single-zone and multi-zone projects with climate-specific parameters across residential and commercial applications.
Features
Applies ASHRAE design conditions, solar heat gain factors, and regional weather data to your building location
Calculates BTU/h requirements and suggests furnace, air conditioner, heat pump, or boiler capacity with efficiency ratings
Converts load estimates to design airflow (CFM) and recommends duct sizing and diffuser placement by zone
Cross-checks calculations against ACCA standards and flags design parameters for code approval
Handles residential and commercial projects with separate load calculations per zone or floor
Evaluates walls, windows, roof, foundation thermal resistance and air leakage impact on loads
Produces justification summaries and calculation sheets suitable for permit applications
Compares sizing and operational costs across different efficiency ratings and equipment types
Example Output
Example 1: Residential Load Calculation
- Sensible Heating Load: 42,500 BTU/h | Sensible Cooling Load: 38,200 BTU/h
- Recommended Equipment: 4-ton AC unit (48,000 BTU/h) + 50,000 BTU/h furnace (AFUE 95%)
- Ductwork: 1,600 CFM return + 1,400 CFM supply; 8" main duct, 6" branch ducts
- Compliance: ✓ ASHRAE 90.1 compliant | ✓ Local code verified
Example 2: Commercial Multi-Zone Load
- Floor 1 (Office): 125,000 BTU/h cooling | 95,000 BTU/h heating
- Floor 2 (Lab with higher internal gains): 165,000 BTU/h cooling | 78,000 BTU/h heating
- Total System: Dual 10-ton units recommended with VAV distribution
- Critical Design Notes: Lab zone requires 1.5× safety factor; north facade has minimal solar gain
What's Included
- SKILL.md instruction file: Complete framework for load calculation analysis
- Building Data Template: Structured checklist for collecting building dimensions, envelope properties, window specifications, and occupancy data
- Load Calculation Worksheet: Step-by-step calculation breakdown showing heating/cooling load by component (transmission, infiltration, solar, internal gains)
- Equipment Sizing Reference Chart: Quick-lookup table correlating BTU/h loads to furnace, AC, and heat pump capacities across efficiency tiers
- Code Compliance Checklist: Verification points for ASHRAE 90.1, ACCA Manual J, and local mechanical code requirements
Who It's For
- HVAC design engineers — Develop load calculations for new construction and renovation projects
- MEP consultants — Support mechanical design phases on commercial and institutional buildings
- HVAC contractors — Size equipment and justify system specifications for bids and proposals
- Mechanical code officials — Verify design loads and equipment adequacy during permit review
- Facilities managers — Evaluate whether existing equipment is adequate after building modifications or envelope improvements
Best For
- Preliminary and detailed HVAC design for residential homes and small commercial buildings
- Equipment sizing and selection across furnaces, air conditioners, heat pumps, and boiler systems
- Ductwork and diffuser layout planning based on room-by-room load distribution
- Design justification documents for mechanical code compliance and permit applications
- Comparison analysis of equipment efficiency ratings and life-cycle operational costs
You might also like
Turn project descriptions, timelines, and structured data into professional draw.io diagrams instantly. You can generate flowcharts, org charts, Gantt charts, swimlane diagrams, and process flows by describing what you need. Claude creates draw.io XML that you can open directly in the editor or modify further.
by skillslib
You can design culturally appropriate survey instruments tailored to international development contexts, analyze mixed-methods data by integrating quantitative findings with qualitative insights, and implement robust data quality management systems for your field operations. Claude helps you create survey templates with adaptive logic, develop validation protocols, and produce data quality reports that highlight issues before analysis begins.
by skillslib
You can evaluate whether products are viable remanufacturing candidates by conducting systematic disassembly analysis and identifying recovery opportunities. The skill helps you design efficient remanufacturing workflows, calculate ROI and environmental impact metrics (including embodied energy recovery of 85-90%), and create remanufacturability scorecards that guide design improvements and supply chain decisions.
by skillslib
You can diagnose warehouse bottlenecks using structured data analysis, then generate optimized layouts and flow improvements. The skill models space utilization, labor deployment, and throughput constraints to identify quick wins and long-term improvements, delivering quantified cost savings and performance gains for your specific facility.
by skillslib
You can systematically code qualitative data against your evaluation framework, surface patterns and themes across multiple responses, extract compelling impact stories with supporting evidence, and generate summary matrices that link narrative findings to your outcomes claims. This skill maintains analytical rigor while reducing the 40-60 hours typically spent manually reviewing transcripts and open-ended survey responses per evaluation cycle.
by skillslib
Get complete, ready-to-deploy lead magnets tailored to your ideal customer profile. Claude designs the concept, writes the persuasive copy, builds the email sequences, and creates deployment strategies that attract qualified prospects and build engaged lists fast. You'll capture 3-5x more subscribers with magnetic offers that actually resonate.
by skillslib
You can convert raw discovery call notes into polished, multi-section sales proposals that include executive summaries tailored to buyer personas, needs analysis mapped to your solution architecture, tiered pricing options with competitive positioning, ROI projections with financial justification, and realistic implementation timelines. The skill preserves personalization and strategic positioning while automating structural components, letting you respond to RFPs and time-sensitive opportunities without sacrificing quality or consistency.
by skillslib
This skill generates optimized facility layouts by analyzing material and personnel flow patterns, validating against operational constraints, and comparing multiple design options with quantified metrics. You provide your facility's dimensions, equipment locations, and operational requirements, and Claude produces detailed layouts with flow efficiency scores, space utilization analysis, and cost-benefit comparisons. Each layout option includes specific recommendations for improving throughput, reducing congestion points, and enhancing safety compliance.
by skillslib