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"According to the ASHRAE HVAC Applications Handbook, the estimated life of an air-to-air heat pump or a rooftop unit is 15 years while a boiler life expectancy is between 24-35 years, depending on the boiler type. So, you will install two heat pumps or rooftop units for every boiler. Where do you think those old units will end up?" I ask the class.

Scalding in the home or burns from hot liquids is dangerous to anyone, but is a particular concern to the youngest and oldest Americans. Plumbers are charged with protecting the health of the nation. Thus, plumbers can play a key role in reducing the risk, starting with homeowner education.

Codes and standards are intended to provide a minimum level of protection for the public’s health, safety and welfare. And, generally, these documents accomplish that intended purpose in the urban/metropolitan areas of the United States. However, that may not be accurate when one gets into the rural or more isolated areas of the country.

Attending trade shows both large and small have always been an integral part of keeping our business abreast of changes within the PHVAC industry. Our employees knew that upon my return, there would be new innovative products joining the tried and true offerings we provided for our customers.

In order to be an effective leader, you need to first understand what leadership actually is. Many people mistakenly believe that leadership is simply overseeing a group or organization. However, there's much more to it than that. Effective leaders possess a number of qualities that allow them to successfully navigate through challenges and inspire others to do the same.

April 2023. I don't know where the days and weeks have gone, but here we are again, PM Engineer readers. This time we'll discuss the important changes to the code development process in Canada!

Can you spot at least six design or installation details that are going to create problems?

In 1885, when you could still buy a milk cow for $29.70, Albert Butz, a Swiss immigrant living in St. Paul, Minnesota, invented what he called the damper-flapper. He patented it the following year. The flapper opened a damper that allowed outside air to enter a coal-fired home furnace. This increased the oxygen in the furnace and made the fire burn hotter. When the temperature rose to a desired point, the damper closed.

More and more hydronic heating and cooling systems are being designed around air-to-water and water-to-water (geothermal) heat pumps. When the heating distribution system is extensively zoned, a buffer tank is typically installed between the heat pump and that distribution system.

Are you an ace troubleshooter? We pose a question to you, our readers, to review a system’s schematic layout and discover its faults, flaws and defects.