Arc by StrataForge · HVAC heat load calculations

Floor Plan In. Quote-Ready Heat Load Out.

Turn floor plans into clear, professional heating and cooling load reports, so HVAC professionals can make faster, more informed decisions. From residential projects to multi-floor homes, Arc organizes building specifications, room-by-room loads and HVAC system requirements in one place.

Spend less time preparing calculations and more time designing systems, preparing estimates and moving projects forward.

Request a Demo See How It Works

Arc's review screen: a one-story floor plan with 17 numbered pins, one on every room it detected, and the header Rooms Detected, 15 conditioned rooms, 1,747 square feet.

Arc on a phone: Calculation complete, 3 ton, 1 unit, with total cooling 2.83 tons and total heating 14,888 BTU per hour.

Sample job: Juniper Ridge Residence · Sacramento, CA
Total cooling: 2.83tons
Total heating: 14,888BTU/h
Nominal size: 3ton
Conditioned: 1,747ft²

Fictional demo house. Screens are from the current build; values come from the sample drawing.

One floor plan

One Floor Plan. A Complete Picture of Your HVAC Requirements.

Upload your floor plan. Get the information you need.

Arc makes HVAC heat load calculations and quote preparation easier by eliminating complicated data entry. Upload a floor plan, enter a few basic building details, and generate an organized heat load report to support system selection, project planning and quoting.

No complicated drawings or perfect plans required. Arc reads everything from detailed engineering drawings to basic floor plans.

Engineering drawings
Basic floor plans
Digital PDFs
Screenshots
Handwritten notes

Arc on a phone: a zoomed floor plan with numbered room pins and the label Rooms Detected.

Using the mobile app?

Take a picture of your plans with your phone, much like depositing a check through a banking app.

Designed for HVAC contractors, estimators, builders, engineers and MEP professionals. Spend less time gathering information and more time moving projects forward.

Arc's Upload a floor plan screen, with a drop zone that reads Drop a floor plan, or click to browse.

Arc analyzing a drawing: Analyzing your drawing, measuring dimensions.

Drop in a plan and Arc reads the drawing: rooms, dimensions, windows and exterior walls.

Smart defaults

Simple to Upload. Easy to Use. Faster to Quote.

Intelligent defaults and suggested building profiles simplify the quoting process. Customize the details, or move forward with recommended values.

Preloaded Construction Profiles
Suggested building types, insulation values and thermal performance assumptions.
Smart Defaults
Standard values for ceiling heights, slab or crawl space foundations, attic insulation and other building characteristics.
Flexible Inputs
Adjust project details when they're available, without requiring a complete building model.
Simplified Workflow
Reduce repetitive data entry and skip the CAD drawings during initial quoting.

ProfileStick-Built (Code) · R-21 walls · R-49 ceiling

Ceiling heightTypical 8 ft · 9 ft in newer builds

Design tempsPick the city · ASHRAE 1% / 99% filled in

How it works

You Don't Need to Know Everything to Make It Work.

Add the drawings. Multi-story homes get one upload per floor.

The report

What's Included in Your Report?

Detailed documentation, room by room. Every report is organized to make information easy to find, review and share.

Arc · Heat Load Calculation Report Generated 10/16/2026Report ID ARC-6D1F8A52

Residential Project Overview

Juniper Ridge Residence · Sacramento, CA

Total cooling: 2.83tons
Total heating: 14,888BTU/h
Nominal size: 3ton
Conditioned: 1,747ft²

Summer design101 °F

Winter design32 °F

Summer indoor75 °F

Winter indoor72 °F

Room-by-room loads
Room	Cooling BTU/h	Heating BTU/h	CFM
Kitchen	4,639	1,402	155
Dining Room	3,421	1,234	114
Living Room	4,678	2,536	156
Pantry	882	388	29
Laundry	1,159	538	39
+ 10 more conditioned rooms, then the appendix

Calculation disclaimer printed on every reportPage 1

Illustrative report layout. Actual values are calculated from project inputs. PDF reports are currently designed for internal use, with a focus on clear, useful information rather than visual design.

Source Drawings
Uploaded floor plans, one page for each floor.
Building Specifications
Envelope characteristics and the inputs entered by the estimator.
Room Audit
Room dimensions by floor, with conditioned and excluded area totals.
Room-by-Room Loads
Individual cooling and heating requirements for every room.
Detailed Appendix
Supporting load calculations and breakdowns for each room.
Report Identification
Generated date, unique report ID, reference standard and the required disclaimer.

Cooling in navy blue Heating in mustard gold

The same two colors run through the app and every report, so cooling and heating never get mixed up.

Who it's for

Built for the Professionals Who Keep Projects Moving

Whether you're designing an HVAC system, preparing a construction estimate or coordinating building systems, Arc organizes critical information into one accessible report.

Sizing · proposals
HVAC Contractors
Support equipment sizing, project estimates and customer proposals.
Takeoffs · bids
Estimators
Review room loads and building requirements in a consistent format.
Early coordination
Builders & Developers
Improve early coordination of heating and cooling needs.
Systems planning
MEP Professionals
Use organized load information to support broader mechanical and building systems planning.

More than HVAC

Supporting Smarter MEP Coordination.

Arc is a valuable starting point for HVAC planning and for broader mechanical, electrical and plumbing (MEP) coordination.

By bringing project drawings, building specifications and calculated loads together, Arc helps project teams set a clearer foundation for equipment discussions, estimating and coordination with other building trades.

As more MEP solutions become available, the same approach can support a more connected building design and estimating workflow.

Project drawings

Building specs

Calculated loads

One shared referenceArc by StrataForge

MechanicalAvailable now

ElectricalFuture

PlumbingFuture

Less manual work

Less Manual Work. More Project Clarity.

Clear reports. Organized calculations. Better-informed decisions.

With Arc, your team can reduce repetitive documentation, standardize how project information is presented, and move more efficiently from drawings to HVAC estimates.

A heat load calculation report tells HVAC contractors, builders, engineers and estimators how much heating and cooling a building needs, so they can select correctly sized equipment, prepare accurate estimates and plan installations. It turns architectural floor plans and building specifications into actionable information for HVAC design and construction.

Why these reports matter

General notes · 7

1.
Proper HVAC System Sizing
Determine the heating and cooling capacity a building requires, and avoid oversized or undersized equipment.
2.
More Accurate Project Quotes
Give contractors the load data they need to estimate equipment, materials and installation costs with greater confidence.
3.
Improved Energy Efficiency
Support system selections that reduce unnecessary energy use and improve operating efficiency.
4.
Better Indoor Comfort
Identify each room's heating and cooling requirements to keep temperatures consistent throughout the building.
5.
Faster Project Planning
Move from floor plans to documented load calculations without relying entirely on manual processes.
6.
Clearer Coordination
Give builders, HVAC professionals and MEP teams a shared reference for equipment selection, airflow planning and installation requirements.
7.
Professional Documentation
Provide organized reports with project details, room-by-room calculations, building specifications and supporting technical information.

Ready to Simplify Your Next HVAC Estimate?

Upload your floor plan. Review your loads. Prepare your next quote with greater confidence.

Floor Plan In. Quote-Ready Heat Load Out.

Schedule a Demo Get Started

Floor Plan In. Quote-Ready Heat Load Out.