Bob Hot Rod Rohr

Bob “Hot Rod” Rohr has been a plumbing, radiant heat and solar contractor and installer for 30 years. Rohr is a longtime RPA member and Plumbing Engineer and Phc News columnist. Bob joined Caleffi North America as manager of training and education. He can be reached at hotrodradiant@mac.com.

Radiant Insider

Future Energy, Multifuel Options

Become the expert in your community on using renewable energy sources such as solar PV for water or space heating.

February 5, 2020

Bob Hot Rod Rohr

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I predict a big swing in energy sources in the upcoming years. Splashed across the news on a regular basis these days is the push toward electricity as the primary energy source.

Radiant Insider

Seminar Attendees, We Salute You

Training increases your skill level, making you more valuable as an employee — as well as helping raise standards in the industry.

December 5, 2019

Bob Hot Rod Rohr

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If you are an active, in-demand tradesperson, attending seminars can be a challenge. I understand, from being there myself, how your workload often plans for you, not vice versa.

Radiant Insider

Our Future Energy Sources

Those in the heating and cooling comfort industry should pay close attention to the everchanging cost and availability of energy.

September 5, 2019

Bob Hot Rod Rohr

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Allow me to share some thoughts about energy in general, and what’s got my attention in particular.

Radiant Insider

Toys, Tools and Trucks

I hope parents still encourage their kids to explore working with their hands.

June 4, 2019

Bob Hot Rod Rohr

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I hope parents still encourage their kids to explore working with their hands. There’s productive work to be done and fun to be had.

Radiant Insider

Switching Gears

Some things to consider when making the jump to commercial work.

February 4, 2019

Bob Hot Rod Rohr

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There comes a time when opportunities arise to make a jump to commercial work. Here are some things to consider when making that jump.

Radiant Insider

A Number to Know and Trust

As boring and redundant as it may sound, the very first step of every hydronic job should always be determining the actual load, as accurately as possible.

December 5, 2018

Bob Hot Rod Rohr

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As boring and redundant as it may sound, the very first step should always be to determine the actual load, as accurately as possible. The load should include the heat as well as domestic hot water (DHW), if the boiler or heat source supplies both.

Alternative Energy

Valves, Valves Everywhere

Selecting the right type for an application requires flow, pressure and temperature information.

September 10, 2018

Bob Hot Rod Rohr

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Almost every plumbing and HVAC installation uses valves. Information such as the type of fluid, temperature, pressure and flow rate is needed to select the best type of valve for the application.