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I will do manual j heat load calculation and hvac duct sizing
About this Gig
Need an accurate, code-compliant Manual J heat load calculation and duct design report for city permit approval or HVAC equipment selection?
I am Henry, a Licensed Mechanical Engineer with 15+ years of experience in HVAC load calculations, duct sizing, and MEP design. I perform precise heating and cooling load calculations using ACCA-approved methodology (Manual J, D, & S) to prevent costly equipment over/undersizing.
What I Offer:
- ACCA Manual J load calculations (Heating & Cooling)
- Manual D duct design & airflow (CFM) distribution
- Manual S equipment selection & sizing
- Room-by-room CFM breakdown & psychrometric calculations
- Detailed PDF engineering report ready for permit submission
Why Work With Me?
- Years of professional engineering experience
- Compliant with ACCA, ASHRAE, and local energy codes
- Fast turnaround & highly accurate engineering reports
- Post-delivery support for city permit questions
Suitable For: Single-family homes, additions, multi-family units, commercial spaces, and HVAC contractors.
Please contact me before placing an order to confirm project scope and floor plan details.
Project scale:
Building
Building type:
Residential
•
Commercial
•
Other
Delivery style preference
Please inform the freelancer of any preferences or concerns regarding the use of AI tools in the completion and/or delivery of your order.
FAQ
What documents do I need to provide for a Manual J calculation?
Please provide architectural floor plans (with window/door sizes and wall insulation details), building orientation/address, and any specific HVAC equipment preferences. Hand sketches with clear dimensions work too.
Are your Manual J and Manual D reports accepted for permit approval?
Yes. Calculations are performed according to ACCA standards (Manual J, D, and S) and ASHRAE guidelines, making them acceptable for city building departments, energy code compliance, and permit submissions.
Why is a Manual J calculation necessary before buying an HVAC system?
Manual J calculates exact heat gain/loss based on insulation, climate, and structure. It prevents buying oversized units (causing high humidity and short-cycling) or undersized units (failing to cool/heat adequately).
