Certified HVAC Heat Load Calculations
— ACCA Manual J, S, D & Mechanical Plans
Get fully compliant HVAC load calculations for residential, commercial, and industrial projects. Our experts provide Manual J (Load Calculations), Manual S (Equipment Sizing), and Manual D (Duct Design) reports that meet city permit and code compliance requirements. Fast, accurate, and permit-ready.
What’s Included In Your HVAC Design Package?
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Complete Manual J Load Calculation Report (Heating & Cooling Loads)
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Manual S Equipment Sizing & Selection Report
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Manual D Duct Sizing & Layout Plans
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Mechanical Plans for City Submittal (PDF & CAD available)
Manual J
Tonnage Calculation Only
Manual JSD
Manual JS with Duct Design
Manual JS
Includes Equipment Sizing
Mechanical Plan
HVAC Plan for City Permit
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Conditioned Square Foot
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Select Service:
Manual JSD - Load Calculation, Equipment Sizing, Duct Design
Manual JS - Load Calculation, Equipment Sizing
Manual J - Load Calculation
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We provide Non-Stamped Mechanical Plan for City Permit
Calculated Price
Minimum Price:
Manual J: $150 | Manual JS: $175 | Manual JSD: $250
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Upload Plans PDF File, Autocad Plans
Upload Plans or email them to support@heatload.net
 We provide Duct Design for installation purpose |  Mechanical Plan showing register sizes, duct routing, duct sizes, and equipment location |  Mechanical Plan showing equipment schedule, fan schedule, detail notes |
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 Expert in VRV, VRF, Multizone, Multiport, ERV, HRV, Split system - Heat Pump / Roof Top Packaged |  VRV System piped to multiple airhandlers - ducted or ductless. |  Manual D is performed after running the load calculation and sizing the equipment. |