Residential HVAC Design & Construction Knowledge Center

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    What Our Customers Say

    This will save you money!
    This was well worth the money. Quick and easy to work with. The heat and air guys wanted me to buy 7 tons and after it was all said and done I only need 3.5tons. Was a great service to capitalize all of my energy efficient components of my new house.”

    Michelle and Billy Fields – Carney, Oklahoma

    My wife and I employed David Brown to design HVAC for our dream retirement home. David gave us a great usable working plan, one that we could do some of the work ourselves. David helped us with sizing requirements and with some space difficulties. David told us he would not be finished with the plan until we were happy with the plan. We couldn't be happier with the working plan that David provided for us. After living for years in a house where the plumber designed the system and all the faults that came with that we are looking forward to the comfort provided by ConsultAir in our custom designed plan. David's fee has been the best money we've spent on our house so far. You just can't go wrong with ConsultAir and David Brown.”

    Rod Williamson – Grand Saline, TX

    I recently contracted with ConsultAir to perform a Manual J, S, and D for a custom home i am building (General Contractor). The experience was very positive. I had previously performed a Manual J analysis on an install i did about a year ago, so i have some experience on what to look for. David Brown was very thorough about collecting all the data needed to get the most accurate heat loss, heat gain, equipment and duct sizing. He was particularly good at explaining the various options for fresh air recovery as well as the benefits of single stage, two stage, and modulating equipment.

    His expertise helped catch a few errors that would have been made by the HVAC contractor. Great experience!”

    Mike Capozzi – Fall Church, New Jersey

ConsultAir provides residential HVAC design services built around ACCA’s Manual J, Manual S, and Manual D standards, the same three connected calculations required by most current building codes to properly size, select, and deliver conditioned air throughout a home.

Each of these standards has its own dedicated guide below, covering not just what each one does, but the level of detail and accuracy that separates a properly performed calculation from a shortcut.

In addition, you’ll find other useful topics related to residential HVAC design and home building.

Residential HVAC Design & Home Building Topics

Manual J Load Calculation

The foundation of every proper residential HVAC design. Learn what separates an accurate Manual J heat load calculation, one built on real window ratings, true orientation, and precise inputs, from a rushed or shortcut version.

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Manual S Equipment Sizing

Once heating and cooling loads are known, Manual S determines the correct equipment size needed to meet them. Proper equipment sizing provides lasting comfort and energy efficiency for the life of your home.

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Manual D Duct Design

Manual D duct design isn’t just sizing ducts to fit the space available. By properly calculating the airflow, friction rate, and total effective length your Manual J and Manual S calculations call for, this process also identifies where adequate space for duct routing doesn’t exist before framing is complete.

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Installable HVAC Duct Design

Satisfying the local building department with a code-compliant Manual D report and designing a duct system that’s actually installable aren’t always the same thing. Discover the difference between a duct design that satisfies the plan reviewer and one your HVAC contractor can actually install.

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Let ConsultAir help you enjoy enhanced year-round comfort, reliability and maximized energy efficiency by ordering your heating and cooling load calculation today.

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