Blog Posts

PROTECTING YOUR ROOF, YOUR EQUIPMENT, AND YOUR INVESTMENT

Published in the 2023 AHR Tradeshow Journal on 2/7/23 Did you know that brand new HVAC/R equipment all over the world is being supported by blocks of wood (and other makeshift supports) that will rot and warp over the years, potentially damaging expensive equipment and…

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New Mechanical System for Supporting HVAC Equipment

GreenLink has introduced an engineered mechanical support system for mounting a wide range of HVAC equipment including AC units, mini splits, heat pumps, condensers, and associated pipelines and conduit.  The system is designed to produce an extremely secure installation, especially in the face of high…

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The toxic top:  The environmental and structural risks of treated lumber supports on rooftops.

The market has been shifting away from treated wood blocks for rooftop support of pipes, HVAC equipment, and ductwork, etc., largely because they are subject to biodegradation—in other words, rot.  When the sleepers deteriorate, they cause pipe sag and unbalanced HVAC equipment which shortens operational…

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The origin of the KnuckleHead Name

The first KnuckleHead At the turn of the century, it became evident that woodblocks, bricks and other improvised supports for rooftop equipment were no longer sustainable. The first engineered support system was designed by Dr. Tibor Keller, a master machinist. This component was capable of…

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Tall VRFs/Mini-Splits: Blowing in the Wind? Here’s an Answer.

Mini splits are becoming increasingly popular on commercial buildings as well as residential housing. Usually, they can be mounted on any number of support systems, but the taller, narrower profile of the larger units creates a level of vulnerability. In windy conditions, it can tip…

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Securing HVAC Equipment on Mod-Bit Roofs without Mechanical Fastening

Modified bitumen roofs continue to maintain a significant share of the domestic market.  Mod bit is often described as “rubberized” asphalt, meaning it consists of asphalt and a polystyrene or polypropylene polymer infused into a reinforcing fabric.  It is applied in 4’ squares as a…

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Case Study: A Public School in Michigan

Clearing the Way for Coating A public school roof in central Michigan, was scheduled to be resealed with a liquid applied coating.  Two adjacent roof sections were involved separated by a parapet wall over which line sets needed to pass.   Prior to coating  five mini…

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Improved Universal Base

Rough-Ride for Roof Mounted Equipment

Field reports from HVAC and roofing contractors indicate an increasing issue relating to the stability of rooftop equipment installations.  Earthquakes at 6.4 magnitude in January ran through the Caribbean wreaking havoc with the electrical grid and power lines, not to mention rooftop-mounted equipment.  Elsewhere, high…

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Attachment: The KnuckleHead Base and the Rooftop “Junkyard.”

In a perfect world, low-slope roofs would have nothing on them. This was the opinion of the NRCA in 1990. Since then, the proliferation of rooftop equipment and utility lines such as gas pipes and conduit is seen everywhere on low slope roofs. Different trades…

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KnuckleHeads Prevent Split Tip-overs in High Winds

KnuckleHeads Prevent Split Tip-overs in High Winds Roof-mounted heat pump splits are often attached to 4’ X 4’ treated wood beams, which are loose laid on the roof membrane.  While this has been common practice for many years, the emergence of taller “double stacked” units…

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