confused about Heat-Timer Varivalves ...

bklynick

OK, so I guess I'll stick to the Varivalves since I want the quickest venting on the top floor.

A few weeks ago I changed the back coldest room to a C, looks like I should try reinstalling the Varivalve to see if that makes a difference.

I'm about to order a whole bunch of books!

thanks.

bklynick

confused about Heat-Timer Varivalves ...

The small 3 story building I just purchased had Heat-Timer Varivalve air vents on all the radiators and risers at the top floor.

I've been slowly changing them with new Gortons and a few Danfoss thermostatic valves in an attempt to balance the system.

What I'm confused about is what the Varivalves are equivalent to in relation with the Gorton air vent size charts found here: http://www.gorton-valves.com/specify.htm

For example, my research leads me to believe for best results on the cold top floor I should probably install size 'D' on the radiators. Is leaving the Varivalve all the way on the "open" position equivalent to a D? a C? Also, even when the Varivalves are "closed" the radiators still heat up completely. I removed them and tested them by blowing air inside, and the air stopped when closed. Why would the radiator still fill with steam and get hot?

Anyway, I like the concept, but I just don't trust them. I'm about to change the last 3 on the top floor with some Gorton D's, but I'd like to see if anyone can offer some insight.

thanks for any advice!

Brad White

Vari-Valves

when fully open, exceed the venting capacity of a Gorton D by a fair degree. I have found Vari-Valves, when closed, to still pass enough air to be considered "not a positive shut-off". Maybe you were not blowing too hard?

I recommend that you go to the Online Store and purchase SKU #300, the Gill and Pajek guide to balancing a steam system with vents. Well worth it and for a good cause. Such a deal.