For the residential HVAC industry, home performance contracting is exciting, is luring more people into the mechanical systems trade, and is helping to evolve HVAC contractors to new levels of professionalism....More
A growing number of highly successful HVAC contractors are adding duct renovation and commissioning to most of their equipment replacement jobs. This added service is paying big dividends to their customers, and at the same time is leading their companies to double digit net profits....More
There are several high-capacity variable speed/variable torque replacement blower assemblies on the market today that may provide an invaluable solution when you need to increase system airflow....More
This is the third in a series of HotMail articles by ‘Doc’ Falke focusing on specific techniques designed to test, diagnose and improve the performance and efficiency of residential HVAC systems....More
For decades government and utility programs have provided HVAC contractors cash incentives to install high-efficient equipment and seal ducts. A major shift is underway uncovering a wealth of never before realized energy savings....More
When airflow increases 10%, motor amp draw will increase 33%. It’s because of this little known fact that thousands of blower motors are cooked each year as technicians adjust fan speed to increase fan airflow....More
Most filter manufacturers only provide pressure drop ratings for each filter at one rated airflow. So what do you do when you want to install that filter in a system that requires a higher airflow than what’s listed by the manufacturer?...More
Adjustable pulleys are the most commonly used method of changing fan speed in light commercial balancing. Let’s take a look at how adjustable pulleys work on a fan and blower motor and learn how to adjust them. We’ll also learn how to use Fan Law One to calculate how to change the dimensions of a pulley. This will result in a predetermined change in the fan speed....More
If each of us searches our memories we can remember a system or two that we designed which never quite performed like we intended it to. Let’s take a look at four of the top reasons HVAC system designs fail and consider a few tricks that will assure we ......More
Redesigning an existing HVAC system is completely different than designing a new HVAC system from scratch. The primary difference is that you redesign an existing system to remove the defects that prevent it from operating at maximum capacity....More
First of all, a big thank you to those of you who took the time to sign the online petition urging the California Energy Commission to continue allowing the use of traditional balancing hoods in the Title 24 energy regulations....More
Just as other energy standards have chosen to embrace air balancing as a specified method to measure the performance of HVAC systems, the State of California has proposed a ban on air balancing hoods as we know them....More
ContractingBusiness.com is accepting nominations for its 2015 HVAC Residential Contractor of the Year Award.
This award is given to a residential contractor who represent the best the residential HVAC industry has to offer....More
Sporlan Division of Parker Hannifin Corporation, a manufacturer of HVAC/R components, is pleased to announce the grand opening of their new state of the art refrigeration system training center....More
Join Sean Kilcarr, Senior Editor at Fleet Owner, to hear about advancements in light vehicle manufacturing and technology. Sean will cover the latest manufacturing trends, including aluminum body frames, new van models for 2015 and how manufacturers are addressing fuel efficiency through technology....More
The U.S. Bureau of Labor Statistics reported that by 2030, Millennials will be 75 percent of the workforce. With an aging contractor workforce, businesses will need to appeal to and hire this generation of workers.
A recent study from the National Institute of Standards and Technology found that even if a customer purchases the best, most energy-efficient air conditioners, heat pumps and other tools, it may go to waste if the equipment is not properly installed.