Multi Mount 120V (Primary) 24V (Secondary) 40VA Transformer

When adapting to use smart thermostats, many dated boilers and furnaces are not equiped to delive static power to such thermostats. Getting this 40VA transfomer along with the Argo isolation relay board puts any system in position to mulitple smart thermostats (three per board). This has convenient punch-out mount for its 120V primary so I attached it to juction box on my boiler.

Quick delivery, good smart staff

Excellent quality part for a good price. Capable of multiple mounting options. Fit my application well and worked great

Needed to replace these because one did not work and the other two were beginning to fail.

Perfect replacement in a 60-year-old lighting system. Prompt delivery.

Exactly what needed for my boiler and radiant heat.

very fast delivery. excellent product description on the website

Connected into the oil burner circuit. Was a bit concerned that the item showed damage as if it had been dropped, but works fine. I like that it is attached through a junction box knock out and is more permanently installed than some plug in transformers that do the same job.

The flange that holds the transformer to my furnace didn't fit on any of them. It was too big for one spot and too small for the other but still was able to screw it on on 1 end and install. Works great and had my furnaces running again after a lightning strike nearby knocked the transformers out. Good solid build with metal casing.

The price was good and the tripe was attachment was right, but based on the way the secondary wires enter the transformer I vin not recommend. The secondary wires look and feel like they attach to the coil and are not secured otherwise. This will not end well.