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Coil Freeze Plugs vs Freeze Block

Coil Freeze Plugs vs Freeze Block

by Caitlin Buglione | Aug 12, 2026 | Education, Engineered Solutions

3 Reasons to Use a Shell & Coil Heat Exchanger

3 Reasons to Use a Shell & Coil Heat Exchanger

by Caitlin Buglione | Jul 5, 2026 | Education

Understanding Cold Climate HVAC Design and Coil Freeze Protection

Understanding Cold Climate HVAC Design and Coil Freeze Protection

by Caitlin Buglione | Feb 1, 2024 | Education, Engineered Solutions

Frequently Asked Questions

How do I know if I need a new tube bundle or a whole new heat exchanger?

In most cases, the shell outlasts the bundle inside it. A Cooney site visit measures the existing shell and tells you whether a bundle replacement is enough or whether the unit itself needs to be replaced.

What’s the difference between a plate & frame and a shell & coil heat exchanger?

​A plate & frame unit stacks gasketed plates and is compact but relies on gaskets that wear under steam service. A shell & coil unit uses a single continuous coiled tube instead of a tube bundle and tube sheet, with fewer joints and less to leak. Watson McDaniel's Heat Miser® is designed around a plate & frame core; the Heli-Flow® is a shell & tube design with baffles, and Thermo-Pack® is a shell & coil design.

What is a double wall heat exchanger, and do I need one?

A double wall heat exchanger has two physical barriers between the fluids, so a leak vents to atmosphere instead of mixing the fluids. It's typically required for potable water, food & beverage, and process applications.

Can Cooney match my existing AIC or Watson McDaniel unit?

Yes. Cooney supplies heat exchangers across the AIC line and is a stocking Watson McDaniel distributor, including Heat Miser® and Heli-Flow® components. A site visit confirms model and configuration before anything is quoted.

Do you build tube bundles for other manufacturers’ shells?

Yes. Cooney supplies replacement tube bundles engineered to fit shells from Patterson-Kelley, Thrush, American Standard, Taco, CEMLine, Bell & Gossett, and other major manufacturers, in straight tube or U-tube, single or double wall.

How long does a replacement take?

Lead time depends on configuration and materials. Standard OEM tube bundle rebuilds commonly run 6–12 weeks industry-wide, which is why an on-site measurement early is worth doing before a unit fails completely.

What is Thermo-Pack® and how is it different from what I have now?

Thermo-Pack® is Cooney’s own engineered shell & coil system: fully welded 316L stainless steel with no tube bundle to ever replace, 10–15% more efficient than a standard shell & tube unit, and backed by a 5-year warranty.

Do you offer site visits?

Yes, at no cost. A Cooney Technologies Sales Consultant measures your existing equipment on site and recommends the right replacement or upgrade path.

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