The ACCA-standard method for calculating exact heating/cooling capacity needs based on home characteristics and climate.

Why does Manual J matter?

Without it, contractors guess — usually oversizing by 30-50%, causing short-cycling, humidity, and waste.

How much does it cost?

Included with every Breezy system design. Standalone service starts at $500.

Is it required by code?

Yes. California Title 24 requires load calculations for all HVAC replacements and new installations.

How long does it take?

On-site measurement: 1-2 hours. Report delivery: 2-3 business days.

Free Manual J Load Calculations | 48-Hour Delivery | Breezy Air Services

Quick answer: A Manual J load calculation determines the exact heating and cooling capacity your home needs — measured in BTUs, not guessed by tonnage rules-of-thumb. Breezy Air Services performs ACCA-compliant Manual J calculations for every installation to prevent oversizing (which causes humidity problems) and undersizing (which causes comfort complaints). Included with system design. Call (714) 606-0814.

Free ACCA-compliant Manual J load calculations with plans delivered in 48 hours. Upload your blueprints and receive professional equipment sizing with Manual S selection and Manual D duct design. Free for builders working with Breezy Air Services on installation.

What's Included

ACCA Manual J room-by-room load calculation
Manual S equipment selection guidance
Manual D duct design recommendations
PDF report delivered in 48 hours
Title 24 compliance verification

Related Services

AC Installation — Properly sized systems
Heat Pump Installation
HVAC Zoning — Multi-zone design
Builder Services
Estimate Health Check — Verify your contractor's quote

Call (714) 606-0814 or upload your blueprints online. Breezy Air Services, CSLB #1077447.

Frequently Asked Questions

What is a Manual J load calculation?: Manual J is the ACCA-standard method for calculating exactly how much heating and cooling capacity a home needs based on square footage, insulation, windows, orientation, and climate data.
Why does Manual J matter?: Without Manual J, contractors guess your system size — usually oversizing by 30-50%. Oversized systems short-cycle, create humidity problems, and waste energy.
How much does a Manual J calculation cost?: Manual J is included with every Breezy system design. As a standalone service, it starts at $500.
Is Manual J required by code in California?: Yes. California Title 24 requires load calculations for HVAC replacements and new installations.
How long does a Manual J calculation take?: On-site measurement takes 1-2 hours. The calculation and report are delivered within 2-3 business days.