HVAC Engineering & Estimating Pro — Complete Excel System

Take your HVAC design and estimating workflow from scattered calculations to one structured, professional Excel system.

HVAC Engineering & Estimating Pro is a contractor-ready engineering and estimating workbook designed for HVAC engineers, designers, estimators, consultants, installers, and mechanical contractors.

Instead of maintaining separate spreadsheets for load calculations, airflow, equipment selection, duct sizing, costing, and quotations, this system connects the complete workflow in one organized workbook.

WHAT'S INCLUDED

01 — Project Information

• Project name and number

• Client information

• Project address

• Engineer / estimator

• Building type

• Number of floors

• Currency and measurement system

• Project notes

02 — Design Conditions

• Outdoor summer design temperature

• Outdoor winter design temperature

• Indoor cooling temperature

• Indoor heating temperature

• Relative humidity

• Elevation

• Heating and cooling design margins

• Ventilation requirements

• Configurable engineering conditions

03 — Room Inputs
Create room-by-room design inputs including:

• Room area

• Ceiling height

• Volume

• Orientation

• Wall, window and door areas

• Roof / ceiling and floor areas

• Construction information

• U-values / R-values

• Window U-value and SHGC

• Occupancy

• Lighting

• Equipment loads

• Fresh-air requirements

• Infiltration / ACH

• Adjacent-space temperature

• Operating schedule

04 — Cooling Load Calculations
Formula-driven room cooling calculations including:

• Wall transmission

• Roof / ceiling transmission

• Floor transmission

• Window conduction

• Solar window gain

• Door conduction

• Occupant sensible load

• Occupant latent load

• Lighting load

• Equipment load

• Ventilation sensible load

• Ventilation latent load

• Infiltration sensible load

• Infiltration latent load

Automatically calculates:

• Room sensible load

• Room latent load

• Total cooling load

• Sensible Heat Ratio

• Design safety factor

• Required cooling capacity

• BTU/h

• Tons of refrigeration

05 — Heating Load Calculations
Calculate room heating requirements for:

• Walls

• Windows

• Doors

• Roof / ceiling

• Floors

• Infiltration

• Ventilation

• Other applicable losses

Outputs:

• Heating load

• Design heating capacity

• BTU/h

• kW

06 — Ventilation & Infiltration
Calculate:

• Ventilation airflow

• Infiltration airflow

• Sensible ventilation load

• Latent ventilation load

• Sensible infiltration load

• Latent infiltration load

07 — Room-by-Room Summary
A consolidated view of room:

• Cooling loads

• Heating loads

• CFM

• Ventilation

• SHR

• Tons

• Design airflow

08 — Airflow / CFM Calculations
Calculate required airflow using:

• Room sensible load

• Indoor design temperature

• Supply-air temperature

• Ventilation requirements

• Air changes per hour

Outputs:

• Required sensible CFM

• Ventilation CFM

• Final design CFM

• CFM/ft² or CFM/m²

• Airflow warnings

09 — Equipment Sizing & Selection
Select equipment from an editable equipment database.

Compare:

• Required capacity

• Nominal capacity

• Sensible capacity

• Latent capacity

• Heating capacity

• Rated airflow

• Static-pressure capability

• Efficiency

• Voltage

• Phase

• Refrigerant

• Equipment price

The workbook calculates:

• Capacity margin

• Oversizing %

• Undersizing warnings

• Recommended equipment

• Equipment cost

10 — Duct Sizing
Supports configurable:

• Friction-rate method

• Velocity method

Calculate:

• Round duct diameter

• Rectangular duct dimensions

• Air velocity

• Friction loss

• Equivalent length

Includes fittings such as:

• Elbows

• Tees

• Reducers

• Transitions

• Dampers

• Grilles / registers

11 — Static Pressure
Calculate pressure losses through:

• Supply duct

• Return duct

• Filters

• Coils

• Dampers

• Grilles

• Registers

• Elbows

• Transitions

• Other fittings

Automatically calculates:

• Supply-side pressure

• Return-side pressure

• Total external static pressure

• Equipment pressure requirement

• Fan/static-pressure warnings

12 — Equipment & Material Database
Maintain your own database of:

• Manufacturers

• Models

• Equipment types

• Capacities

• Airflow

• Static pressure

• Efficiency

• Prices

• Availability

13 — Labor Database
Create reusable labor rates for:

• Installation

• Ductwork

• Equipment installation

• Controls

• Testing / commissioning

• Other HVAC tasks

14 — Job Costing
Calculate:

• Equipment cost

• Material cost

• Labor cost

• Subcontractor cost

• Other project costs

• Overhead

• Contingency

• Markup

• Profit

• Tax

• Final selling price

15 — Professional Quotation
Automatically generate a client-ready quotation containing:

• Company information

• Client information

• Project information

• Scope of work

• Equipment

• Materials

• Labor

• Optional items

• Exclusions

• Subtotal

• Overhead

• Markup

• Tax

• Grand total

• Payment terms

• Quote validity

• Terms and conditions

16 — Management Dashboard
Monitor key project and commercial information including:

• Project value

• Equipment cost

• Material cost

• Labor cost

• Gross profit

• Gross margin

• Average project value

• Cooling capacity

• Heating capacity

• Total CFM

• Equipment quantities

• Quote status

17 — Assumptions & Engineering Constants
Engineering assumptions and constants are separated from the calculations so users can review and modify them instead of relying on hidden hard-coded values.

18 — Checks / Warnings
Built-in checks identify:

• Missing inputs

• Invalid values

• Missing U-values / R-values

• Missing design temperatures

• Missing airflow

• Equipment undersizing

• Excessive oversizing

• Excessive duct velocity

• Excessive pressure loss

• Insufficient fan capability

• Unit inconsistencies

• Other calculation issues

19 — Example Project
A fully populated example demonstrates the complete workflow:

Project → Room Inputs → Cooling / Heating Loads → CFM → Equipment Selection → Duct Sizing → Static Pressure → Materials & Labor → Job Cost → Quotation → Dashboard

WHY THIS SYSTEM IS DIFFERENT

This is not simply a collection of formatted Excel tables.

The workbook is structured as an interconnected engineering and estimating workflow. Major calculations are formula-driven, inputs and assumptions are separated from calculations, and warnings are surfaced instead of being hidden.

DESIGNED FOR

• HVAC Engineers

• HVAC Designers

• Mechanical Engineers

• HVAC Estimators

• Mechanical Contractors

• HVAC Installers

• MEP Consultants

• Building Services Professionals

• HVAC Companies

• Engineering Students and Professionals

IMPORTANT NOTE

This workbook is an engineering calculation and estimating tool. It does not replace applicable local codes, project specifications, manufacturer data, professional engineering judgment, or required review/sealing by a qualified engineer. Users are responsible for verifying design conditions, construction properties, equipment performance, code requirements, and final selections for each project.

FILE FORMAT

Microsoft Excel (.xlsx)

The workbook is designed to be editable so you can adapt project conditions, engineering assumptions, equipment, materials, labor rates, pricing, and quotation settings to your own workflow.