Selecting HVAC Manual J Designer – Base YOUR Decision on ACCA Manual J8 Appendix A Criteria

It is critical a proper Manual J load calculation be performed prior to installing an HVAC system.  It is also important the person performing your load calculations is knowledgeable in Manual J, S & D theory and ACCA Certified Manual J Software.

Insist on an ACCA Certified Manual J Load Calculation – Get the Best

When it comes to the HVAC design process and Manual J load calculations, you can’t go wrong by simply following in the footsteps of those who came before you. The Manual J load calculations are clear, tested, and true, and there is a reason they have truly become the industry standard. Builders and contractors who … Continue Reading »

Manual J Load Analysis – knowing the heat waves and cold fronts

Heating, Ventilation, and Air Conditioning equipment (HVAC) is known as essential appliance to a building. Whether it is a home, residential building or a commercial building, HVAC equipment effectiveness is hard to measure. The problem is the volume for HVAC has to be pre-planned to fit to the environment. How many rooms in the building, … Continue Reading »

Location, Location, Location – Manual J Indoor and Outdoor Design Conditions

The building location is described by its latitude and elevation. The outdoor design conditions such as the elevation of the location, latitude, winter heating dry bulb temperatures, summer cooling dry bulb temperatures and relative humidity (RH) information is determined by your geographical location. Tabulated data for various cities throughout the United States are listed in … Continue Reading »

How an ACCA Certified Manual J Can Set You Apart From Your Competition

Residential HVAC Contractors: make your lives easier and increase your revenues by utilizing an ACCA Compliant Manual J Load Calculation on every home you build or remodel. By utilizing the Manual J Load Calculation you set yourself apart from your competition by guaranteeing your client will have the industry standard in home heating and cooling … Continue Reading »

ACCA Certified Manual J – Accept No Imitations

The Air Conditioning Contractors of America (ACCA) is the largest organization of heating, ventilation, and air conditioning (HVAC) contractors in the United States. As such, it’s committed to always highlighting the latest trends in the industry, and for providing HVAC contractors with access to cutting-edge resources that allow them to be the best at their … 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 »

This House is TOO HOT – How an ACCA Certified Manual J will avoid the Goldilocks Home

Utilizing ACCA certified Manual J load calculations, a professional can provide you with the right HVAC design for your home.  It is important to understand that there is a lot more involved in the efficient heating and cooling of any home then simply turning the dial on the thermostat.  In order to get the maximum … Continue Reading »

Manual J Load Calculations – Don’t Make Assumptions, Design Does Matter!

The use of commercial software to calculate the heating and cooling loads greatly simplifies the process. Various software applications that provide results certified by ACCA to meet all requirements of MJ8 are available such as WrightSoft Residential.  Heating and cooling load calculations are dependent on many factors.  This blog covers building orientation, AED (Adequate Exposure … Continue Reading »

Oversized or Undersized HVAC Equipment – Neither makes for a Comfortable Home

Many contractors think a bigger system will reduce the number of complaints they get.  Or the HVAC unit may be oversized because you have added insulation or double-pane windows and the contractor just replaces your old inefficient system with a new efficient system of the same size.  What good is it to you when your … Continue Reading »