New books available now!

Check out our shop page to see the new books all about HVAC and how to create the perfect environment in your home.

RESIDENTIAL & LIGHT COMMERCIAL

LOAD CALC, ENERGY CALC AND HVAC DESIGN EXPERTS

ENGINEERING QUALITY AT PRICES YOU CAN AFFORD
ProCalcs specializes in HVAC Load Calculations, Energy Calculations, Manual D, Manual S, Manual T, and more!

Energy Efficient Products

Affordable, High-Quality HVAC Load and Energy Calculations

Why Choose ProCalcs?

ProCalcs addresses the needs of residential and commercial builders, architects, engineers, HVAC companies, and homeowners by delivering high-quality results and flexible turnaround times.

Services

Manual J – Residential Calculations

Manual N – Light Commercial

Manual S – System Design

Manual T – Air Distribution Basics

Manual D – Residential Duct Design

Load Calculations

Energy Calculations

Duct Design

HVAC Design

And More!

layer-11

Find out how much you can save on your project!

tom-book NewCover

LEARN MORE ABOUT HVAC MISCONCEPTIONS

In this world, we often find ourselves at the mercy of those whom we assume know more than us. This can cost us time, money, energy, and even our health.

Heating and Air Conditioning systems run on simple principles and ignorance of those can cost you more than you can dream! This book gives you the tools to empower yourself so you will never again have to blindly trust what others are telling you and you can troubleshoot minor problems yourself.

In a rush? Ask about our
Expedited Services*

*when available. Extra fees apply.

OUR SERVICES

Manual J Calculations

Manual J Load Calcs – Determines the total amount of heat gained or lost externally or internally in residential properties.

Manual N Calculations

Determines the total amount of heat gained or lost externally or internally, in small- to medium-sized commercial buildings.

Manual T Calculations

Feeling drafts? We can help eliminate your problems associated with moving air or having an inadequate mixing of the air.

Manual S Calculations

Covers sizing strategies for all types of cooling and heating equipment, as well as how to use manufacturer’s performance data!

Manual D Calculations

The ANSI-recognized national standard for residential HVAC duct design will help you design a duct system in less time.

HVAC Design for Contractors

ProCalcs’ Calculations is certified for duct design, test and balance, Manual D certified, and holds a class “A” license.

HVAC Design for Builders

ProCalcs’ professionals determine the best HVAC and duct systems to meet state codes to ensure your project goes smoothly. We offer complete HVAC design solutions.

HVAC Design for Homeowners

Are you getting the right system for YOUR home? We ensure your new system meets all applicable codes and is sized exactly for your needs.

HVAC Design for Architects

We understand the mechanics, designs, flows, and formula required for a specific project so your bids are as accurate as possible.

Recent Reviews

  • Thank you Procalcs for the prompt attention to our needs. we were in need of an Energy calculation, Manual J, and mechanical layout. We provided Procalcs with the brand and model of unit that we wanted to install, and they did the calculations. we needed few corrections from the original documents, and Procalcs did the modification no question ask. Thank you to the team of Procalcs.
    read more
    carlos Noto (SEACAT) Avatar
    carlos Noto (SEACAT)
    5/25/2024
  • Procalcs is fantastic!!! They did a full manual j load calc manual s system calc manual d duct design manual t air flow etc... on my residential new build near Columbus Ohio They did a great job!!!! The entire staff was very professional They responded to my initial inquiry almost immediately and gave a very quick and precise estimate for my job They provided a fantastic duct design and did it in record time!!! My residential new build required two systems due to the square footage Jerson was fantastic on the design and the entire staff was very good about staying in contact with me I received professionally done duct and system layout as well as all of the associated data that my local building department required Could not be happier!!!!! Thanks Procalcs!!!!!!
    read more
    Robert Laflin Avatar
    Robert Laflin
    10/29/2023
  • We switched to this out-of-town Manual J service when our previous provider was backed up and slow. ProCalcs is quick to respond, thorough, and even took the time to "override" and correct the errant findings of a Professional Engineer that reviewed one of our projects, contesting the sizing of the HVAC equipment. Kudos for going over and above on all aspects of product delivery and customer service!
    read more
    Harris Woodward Avatar
    Harris Woodward
    7/29/2023
  • ProCalcs were very helpful with my design and working within the constraints of my project. I had been looking for a good HVAC designer for a while, glad I found ProCalcs. I would highly recommend ProCalcs for any HVAC designing.
    read more
    Richard Strand Avatar
    Richard Strand
    7/29/2023
  • Their staff treats each project professionally from a small remodel to an 11k SqFt custom home. They itemize their services and allow you to choose what scope they will perform. The results are well presented and in a very timely manner.
    read more
    Brian Eckstein Avatar
    Brian Eckstein
    6/29/2023
  • My experience with ProCals was professional, timely, educational and kind. I'm a 46 yr old woman in charge of a $500k+ project. As we ran into issues with the complexity of our HVAC system design, our original architect outsourced the mechanical calculations and drawings to ProCals. The City of Doral had rejected the plans and I didn't understand all the codes on the remarks. At this point, time & money on my mind, I was very anxious. Ashley was the first one we spoke with. She was listen to my frustration then took time to go through each of the remarks and explain. There were about 10 of them. After the changes, my architect and I were able to resubmit the plans and they got approved. So construction could finally start. John and Richard were so kind through all of the issues that came during the mechanical installation. Kimberly and Ashley always responded to emails if the guys were not able to right away. We had a few change request charges, but to me surprised, many if them they simply updated. Here are a few changes we had them do. FIRST We could not get the RTU anymore and needed to change the plans again. ---and if I recall correctly, we had them put this one on the plans but by the time we got through City approval. Somehow that unit wasn't available anymore. The units that we could get we had them change the plans to the new units and do all the calculations again. THEN....! We needed to change all the exhaust and returns in the common areas THEN....! We had them change all the the dimensions of the return ducting to allow for the interference of the fire riser, roof, plumbing vents, electrical, sprinkler systems and everything else that is in the face that required are returns to go through. THEN...! The exhaust unit we told him we were getting became unavailable so we call to change the plans again and recalculate again. This pandemic has been very crazy securing parts, things have disappeared, contractors and everything they're going through, he is an owner and managing the project, all of these variables has made this project much crazy than previous projects. So that is SOME of the detail behind why I say My experience with ProCals was professional, timely, educational and kind. I've never met Tom, but he was copied on all communications. So all I can say about Tom is that HE HAS AN AMAZING TEAM. So he MUST be pretty cool at well.
    read more
    Anne Johnson-Bey Avatar
    Anne Johnson-Bey
    5/29/2023
  • ProCalcs did a great job completing the HVAC design reports for our new home. They were very accommodating to all my questions and changes.
    read more
    Lance McEwan Avatar
    Lance McEwan
    5/29/2023
  • They always do an excellent job. Very fast delivery
    read more
    Fernando Urdaneta Avatar
    Fernando Urdaneta
    5/29/2023
  • The quality of product exceeded my expectations. Value was very fair. I would recommend.
    read more
    mike scheurich Avatar
    mike scheurich
    5/29/2023
  • They did an excellent job with energy calculation of new and existing HVAC for proposed home addition
    read more
    Madge Fannell Avatar
    Madge Fannell
    5/29/2023

Choose US For Your HVAC Design Needs

Get your Free Consulting

Have an idea, a dream? We can make it happen.