ACCA HVAC System Design – Manual J, S & D – The Basics

When you are building a house, it is very important to make sure your HVAC equipment is properly sized for the space that you are building in. Building a system that is too big or too small can cause many problems down the line that you won’t want to deal with because you’ll just want … Continue Reading »

WrightSoft ACCA Compliant to Get It Right – WrightSoft Manual J Designers

ACCA approved Wrightsoft programs include Right-J for residential heat gain and heat loss calculations, Right-D for residential duct sizing and Right-N for light commercial loads.   WrightSoft also bundles their various design modules into Right-Suite.  Bill Wright and his team are continuously adding new easy-to-use features.

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The Second Step – Select Efficient and Properly Sized Heating and Cooling Equipment using ACCA Manual S Equipment Selection

So you are getting ready to replace an old HVAC system or perhaps you are building your new dream home.  Before making that purchase or even selecting the installing contractor, there are three important factors to investigate to ensure optimum comfort in your home for many years to come.  This blog addresses the 2nd step … Continue Reading »

Manual S HVAC Equipment Selection – Just the Right Size

When it comes to choosing adequate equipment to provide central heating and air conditioning to a home, it’s of utmost importance to have pinpoint accuracy when calculating the necessary load. If the calculations are too conservative, the homeowner may be stuck with a system that can’t handle the needs of the home. If the calculations … Continue Reading »

Is Your HVAC Design ACCA Manual S Compliant?

Most permit offices, LEED, Energy Star and Interna­tional Residential Code (IRC) defines the requirement for sizing HVAC equipment: “Heat­ing and cooling equipment shall be sized in accor­dance with ACCA Manual S based on building loads calculated in accordance with ACCA Manual J or other approved heating and cooling calculation methodologies” (emphasis added).

Manual S Equipment Selection – Selecting Home Systems

While Manual J lets you know how to maximize your efficiency when designing heating and cooling systems for a client, Manual S is really a vital component and companion to Manual J. This manual is a must-have for all aspiring contractors and builders. This manual will give you everything you need to know about how … Continue Reading »

Risks Associated with Oversizing HVAC Systems – Bigger isn’t Always Better

Oversizing any HVAC system will result in increased energy use, reduced comfort, indoor air quality, building, and HVAC equipment durability. The oversized comfort system will “short cycling” in both the heating and cooling modes. In order to reach peak operational efficiency and effectiveness, the HVAC system needs to run for as long as possible to … Continue Reading »