Clark Ray Designs LLC
HVAC Design and Load Calculation &
Residential Drafting
Manual J • Manual D • Manual S — Design only. No sales, installs, or service.
Manual J — Residential Load Calculations
Precise room-by-room heating and cooling loads using ACCA Manual J. Ideal for new homes, additions, and remodels.
Manual D — Duct Design
Duct layouts sized and routed per ACCA Manual D for comfort and performance.
Manual S — Equipment Selection
Match equipment to calculated loads per ACCA Manual S for efficiency, comfort, and code compliance.
Custom Homes, and Remodels
Bring your Idea and we will make it buildable
Barns and Shops
Want a Custom shop or Barn?
Design-Only, No Sales
I do one thing well: HVAC design and load calculations. No equipment sales, no installs, no service.
Why Choose Clark Ray Designs
ACCA-compliant Manual J, D, and S methods
Transparent design-only scope—no upselling
Responsive support via email or phone