Manual J load calculation service for residential HVAC projects
Upload your plans and project details, and get a permit-ready ACCA Manual J residential HVAC load calculation report—room-by-room heat loss and heat gain, sensible and latent loads, and system totals—without touching the software yourself.
Ideal for HVAC contractors, design-build firms, energy auditors, and homeowners who need a one-off residential Manual J load calculation or a regular partner for permit-ready HVAC design.
When a done-for-you Manual J is faster than DIY
Many HVAC companies know they should run Manual J load calculations for every home, but the reality is that software, training, and time are all bottlenecks. Our white-glove Manual J service handles the entire residential HVAC load calculation for you, using the same calculation engine that powers the Load Calc Guru app.
Free up your calendar
Reduce sizing risk
Projects that fit our Manual J service
Single-family homes, additions, gut remodels, and light multi-family projects that need permit-ready Manual J load calculations.
Heat pump conversions (gas furnace to heat pump or dual fuel) where correct heating load and balance point are critical.
High-performance and energy-efficient homes where code officials, energy raters, and programs require documented Manual J HVAC load calculation reports.
Busy HVAC contractors who want consistent load calculations without buying and learning another software package.
For edge cases or large commercial jobs, contact us first so we can confirm scope and pricing.
How the white-glove Manual J service works
We use the Load Calc Guru Manual J calculation engine to produce a detailed residential HVAC load calculation report based on your drawings and project notes. You get a permit-ready PDF plus optional exports you can use for Manual S equipment selection and Manual D duct design.
Share project info and drawings
Send floor plans, elevations, window schedule, and any available specs: insulation levels, construction type, orientation, and blower door results if you have them.
Tell us whether it's a heat pump, furnace, or dual-fuel HVAC system design, and any zoning or ductless head preferences.
We run the Manual J load calculation
We model the building in Load Calc Guru, applying ACCA Manual J methodology to calculate heating and cooling BTU/hr by room and by system, including sensible and latent loads.
We use appropriate design temperatures for your climate zone and document assumptions so the HVAC load calculation is transparent for reviewers.
Receive your permit-ready Manual J report
You get a clean Manual J PDF report with room-by-room and whole-house load summaries, plus system totals for heating and cooling.
Use the report for permit submittals, equipment selection, and homeowner proposals. Repeat clients can have projects copied into their own Load Calc Guru account for ongoing edits.
What's included in every Manual J service project
Each residential HVAC load calculation includes the data most building departments, energy programs, and savvy homeowners expect to see in an ACCA-style Manual J report.
Detailed load reports
Room-by-room heat loss and heat gain in BTU/hr.
Sensible and latent cooling loads with totals by system.
Indoor and outdoor design conditions clearly documented.
Inputs and assumptions
Envelope R-values, window performance, and shading assumptions.
Infiltration rates, including blower door ACH50 if available.
Occupancy and internal gains assumptions suitable for Manual J.
Ready for Manual S and Manual D
Load breakdowns you can use for Manual S equipment selection: match capacity to design loads instead of rules of thumb.
Room loads and airflow targets that support Manual D duct design, zoning decisions, and ductless head sizing.
Who benefits most from Manual J service?
HVAC contractors & designers
Busy teams that need permit-ready Manual J reports fast.
Companies without in-house design staff or software.
Contractors who want consistent residential HVAC load calculations across every job.
Builders, energy pros, homeowners
Custom home builders and architects who want documented HVAC design loads.
Energy auditors and raters needing consistent Manual J data for programs and incentives.
Homeowners who want a one-time, independent Manual J to sanity check proposed HVAC equipment sizing.
Ready to request a Manual J load calculation?
Pricing depends on project complexity and turnaround time. Simple single-family homes cost less than multi-zone or high-performance projects, but every job includes a full Manual J load calculation report generated with the Load Calc Guru engine.
Share your plans, timeline, and any program requirements, and we’ll confirm scope, price, and an estimated delivery date before we proceed.
Manual J service FAQ
Common questions about the Load Calc Guru white-glove Manual J load calculation service for residential HVAC projects.
Tell us about your project
Fill out this form and we'll follow up about pricing, scope, and turnaround for your residential Manual J HVAC load calculation. Your message is sent directly to our white-glove team.