Differant temps for diff. zones

Michael_8

We have downstairs zone in slab, upstairs zone with fin type radiators. Can they both run at the same temperature or is it recommended to utilize a mixing valve to change temps. Thanks for any advice you can provide. P.S. What temperatures do you recommend. Thanks Michael

chuck shaw

> We have downstairs zone in slab, upstairs zone

> with fin type radiators. Can they both run at

> the same temperature or is it recommended to

> utilize a mixing valve to change temps. Thanks

> for any advice you can provide. P.S. What

> temperatures do you recommend. Thanks Michael





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chuck shaw

The first thing

to do is have a full heat loss done, compare it to what you have for fin tube, and also for spacing on the in slab. Once this is done, then you can determine the temperatures you need. Normally, they will be two different temps. Varying as much as 90*F. I would be very suprised if they could both run at the same temperature.

You most likely have to set up some type of mixing. The piping arangement will vary, depending on how it is done, you can use a tempering valve, a 3 way motorized valve, a 4 way motorized valve, or injection mixing.

You may want to call in a pro to help with this.

Check the "Find a Contractor" link above the posts.

good luck with your project.

Chuck Shaw

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Michael_8

More info

I guess I should have mentioned that this is a 50 year old home with no real way of knowing what the spacing is in the slab, I do know the radiator count but the boiler was removed previously and we were called in to replace the boiler. Unfortunately I have nothing to go by.

chuck shaw

is the tubing

copper, steel, or something else? It may be worth it to invest in a inexpensive metal detector. Or maybe borrow one if you can.

You still need to do a heat loss to determine the boiler size. You cant do anything with temps, untill you know your heat loss. Then, figure out what type of fin-tube you have, and find out how many BTU/foot the baseboard puts out at what temp. Compare your loss to the baseboard output at certian temps, then you have your numbers.


If you can find out the spacing on the stuff in the slab, then use the same procedure. May want to test the slab first, see if it is even going to be an issue. It may not hold any pressure, and you dont have to worry about it.

Hope this has helped

Chuck



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Jason Horner

Try www.raytek.com for handheld infrared temp. devices. They have ones from about $100 up to $10,000+

Will help you find hot tubing in floors and walls, and overheating pumps and motors that are out of arm's reach.