I will do manual d hvac duct design, sizing and airflow calculation

United States

I speak English

Hvac engineer

I’m Alex Carter, an HVAC design engineer specializing in residential heating and cooling systems. I provide Manual J load calculations, Manual D duct design, Manual S equipment selection, and heat pum...
About this Gig

Need properly sized HVAC ductwork and balanced airflow for your residential project? I will professionally develop a Manual D-based duct design using your project requirements and available load information.


My service can include supply and return duct sizing, main trunk sizing, branch sizing, room-by-room CFM, airflow calculations, duct layout, and a detailed duct sizing report.

I can work with new construction, existing homes, HVAC replacements, additions, heat-pump systems, and residential HVAC layouts.


What I need:

  • Architectural/floor plans
  • Room dimensions
  • Manual J loads if available
  • HVAC equipment information when available
  • Project location
  • Existing duct information when applicable


If you already have a Manual J calculation, I can use the room-by-room loads to develop the duct sizing and airflow requirements.

For heating and cooling load calculations, see my Manual J service. For equipment selection, see my Manual S service.


Message me before ordering large, multi-zone, or complex projects.

Project scale:

Building

Building type:

Residential

Commercial

Industrial

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.