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Home » Authors » John O’Reilly

John O’Reilly

John O’Reilly has devoted his entire professional career to the design and construction industry — particularly plumbing and HVAC. Before entering the agency business in the mid-1990s, John worked for over 20 years as an editor with Supply House Times, developing business management content on and for plumbing and heating wholesaler-distributors. That professional background eventually brought him to the attention of a suburban Chicago-based agency that served building-product manufacturers. O’Reilly joined the agency in 1996, purchased it from the founder in 2004, and eventually re-branded it as GreenHouse Digital + PR.

O’Reilly can be reached at john@greenhousedigitalpr.com.

Articles

ARTICLES

Six tankless water heaters that feed the nutraceutical manufacturer’s operations.
Case Study

How to deliver large volumes of hot water quickly and intermittently

California-based nutraceutical manufacturer meets large, spiking hot-water needs with a combination tankless-and-tank system.
John O’Reilly
May 13, 2025

Proper water heater sizing in any application hinges primarily on user consumption within a given period. That much is probably obvious, even to someone who has never sized a water heater. What complicates matters, especially in a large commercial application, is the cadence of that usage.


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17-unit, Noritz tankless water heater system at Wedgworth’s fertilizer blending facility in Lake Placid, Florida

Tankless water heaters offer reliable, cost-saving alternative for fertilizer producer

Florida fertilizer producer replaces boilers with multiple-unit tankless water heater systems
John O’Reilly
September 20, 2024

Tankless water heating technology has proven to be a great success for Wedgworth's, a custom blender of dry and liquid fertilizers for agriculture, sod, nursery, and golf-course applications in Florida.


Read More
assisted living facility

Hydronic pressurization unit helps maintain Chicago-area assisted living facility

Mikrofill 3 helps 235-unit retirement community identify potential costly leaks.
John O’Reilly
April 17, 2023

The very first installation of the Mikrofill 3 hydronic pressurization unit in North America took place recently in a mechanical room of an assisted- and independent-living community in Southwest-suburban Chicago. You might say the flower of this innovation grew from the soil of an old industry friendship.


Read More
View of Atrium

Iowa building integrates striking aesthetics with innovative mechanical systems

Five-story, 126,000-square-foot, LEED Gold building features numerous structural and mechanical innovations.
John O’Reilly
April 10, 2020

The Visual Arts Building (VAB) at the University of Iowa in Iowa City, Iowa, is a marvel of both aesthetic design and mechanical engineering. 


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