Getting a New HVAC System? Here's What Every Homeowner Should Know First.
Before you talk to a single contractor, get the facts. Our free guide gives you everything you need to make a confident, informed decision — in plain English.
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Getting a new HVAC system sounds simple. Until it isn't.
That's exactly what The Homeowner's HVAC Buying Guide is for — so you go into every conversation informed, confident, and ready to ask the right questions.
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ProCalcs is an independent, licensed HVAC design firm — not an installer, not a salesperson, and not affiliated with any equipment brand. We don't install systems. We don't sell equipment. What we do is provide the load calculations and design work that tell you — and your contractor — exactly what your home actually needs.
Get your own load calculation — and walk in with confidence.
The guide gives you the knowledge. But if you're ready to get your actual numbers, we can help with that too. Our team will prepare a complete load calculation for your home — giving you an independent, permit-ready document that tells you exactly what size system you need before any contractor sets foot in your door.
PROCALCS
HVAC Designs for Homeowners and Contractors
When it comes to HVAC design, homeowners must find an energy calculation team with the right experience and up-to-date training for the job. ProCalcs is here to serve as your nationwide source for load calculations and more, taking every step to ensure your home is fitted for the most comfortable and effective outcome.
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HVAC DESIGN FOR HOMEOWNERS
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Most homeowners will purchase one new HVAC system in their lifetime, and it’s important to select the best one for your needs. Unfortunately, the first source most people turn to is HVAC contractors, who often rely on outdated methods for determining load and capacity for these systems. They also fail to understand how to manage air distribution to avoid drafts and stagnant air problems.
If you or your builder are considering working directly with an HVAC contractor, ask them these questions first:
- What are the U factor and SHGC of the windows in the building?
- What is the difference between foam roof deck and attic insulation?
- How does duct work design impact air flow?
- Why are these issues important in determining HVAC capacity?
For light commercial building, another important question is whether the capacity calculations have included code requirements for fresh air flow.
The truth is that most HVAC contractors can’t answer these questions, and worse, don’t understand why they are important. In most situations, they recommend a system that has too great a capacity for your needs. This results in increased mold growth, high humidity, and inconsistent temperatures throughout the building.
ProCalcs’ HVAC design pros are here to create the best system for your personal needs through our professional services. Our team takes each of these factors into account, working solely for you and your builder. We have no incentives to recommend one HVAC system over another, except to ensure that your design meets all local codes while perfectly meeting your needs.

