Beat the Texas Heat with Precision-Engineered HVAC Designs from Winsupply of Midlo
Beat the Texas Heat with Precision-Engineered HVAC Designs from Winsupply of Midlo

Partner with Winsupply of Midlo for Fast, ACCA-approved HVAC load calculations and duct layouts.
Partner with Winsupply of Midlo for Fast, ACCA-approved HVAC load calculations and duct layouts.
Why Choose LG Mini
Split Systems?
Eliminate callbacks, guarantee code compliance, and ensure peak performance with ACCA-certified Manual J, S, D, and N design services powered by Wrightsoft.
Eliminate callbacks, guarantee code compliance, and ensure peak performance with ACCA-certified Manual J, S, D, and N design services powered by Wrightsoft.

Manual J: Precise Load Calculations
The Foundation of Every Great System
Stop relying on outdated "rules of thumb" that lead to oversized equipment, short-cycling, and high humidity callbacks in the brutal Texas summer. Our Manual J load calculations analyze the complete thermal envelope of the structure—including insulation R-values, window orientations, solar heat gain, and local climate data.
What you get: Exact heating (BTUs) and cooling (Tons) requirements mapped out room by room.
The Benefit: Guaranteed code compliance, optimized equipment costs, and zero sizing liabilities.
Manual J: Precise Load Calculations
The Foundation of Every Great System
Stop relying on outdated "rules of thumb" that lead to oversized equipment, short-cycling, and high humidity callbacks in the brutal Texas summer. Our Manual J load calculations analyze the complete thermal envelope of the structure—including insulation R-values, window orientations, solar heat gain, and local climate data.
What you get: Exact heating (BTUs) and cooling (Tons) requirements mapped out room by room.
The Benefit: Guaranteed code compliance, optimized equipment costs, and zero sizing liabilities.
Manual D: Engineered Duct Design
Balanced Airflow, Maximum Comfort
The best equipment in the world will fail if the ductwork can't deliver the proper amount air. Our Manual D duct design uses your room-by-room loads to map out an aerodynamically balanced distribution system. We calculate available static pressure, equivalent lengths of fittings, and exact duct sizes for supply and return runs.
What you get: Clear, easy-to-read duct layouts and sizing blueprints for your installation crews.
The Benefit: Eliminates hot and cold spots, reduces system noise, and speeds up field installation.
Manual S: Comprehensive Equipment Selection
The Perfect Match for Real-World Conditions
Just because a unit says "3.5 Tons" on the box doesn't mean it delivers that capacity under real-world conditions. Our Manual S equipment selection cross-references your Manual J loads against manufacturer performance data sheets (expanded ratings). We factor in local outdoor design temperatures and indoor airflows to pick the exact right model.
What you get: Definite equipment verification sheets showing sensible and latent capacities.
The Benefit: Prevents premature equipment failures and ensures the system can handle intense peak-load days.
Manual S: Comprehensive Equipment Selection
The Perfect Match for Real-World Conditions
Just because a unit says "3.5 Tons" on the box doesn't mean it delivers that capacity under real-world conditions. Our Manual S equipment selection cross-references your Manual J loads against manufacturer performance data sheets (expanded ratings). We factor in local outdoor design temperatures and indoor airflows to pick the exact right model.
What you get: Definite equipment verification sheets showing sensible and latent capacities.
The Benefit: Prevents premature equipment failures and ensures the system can handle intense peak-load days.
Other offering:
HVAC design services
Residential HVAC design
Wrightsoft HVAC design
ACCA Manual J calculation
Commercial Manual N design
Manual S: Comprehensive Equipment Selection
The Perfect Match for Real-World Conditions
Just because a unit says "3.5 Tons" on the box doesn't mean it delivers that capacity under real-world conditions. Our Manual S equipment selection cross-references your Manual J loads against manufacturer performance data sheets (expanded ratings). We factor in local outdoor design temperatures and indoor airflows to pick the exact right model.
What you get: Definite equipment verification sheets showing sensible and latent capacities.
The Benefit: Prevents premature equipment failures and ensures the system can handle intense peak-load days.
We also offer comprehesive HVAC Training classes at Winsupply of Midlo
Visit our training schedule form


