Noise from radiant emission plates,

hot_rod

could be the tube expansion in the groove, or the plate to floor attachment method.

Loose or not enough fasteners will allow too much plate movement and noise. Determine which is the cause.

Limiting the temperature swing, especially wide and quick ones as Paul suggested should help either problem.

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Rich Riddle

emission plate noise

I have a client who is complaining about noise in radiant staple-up w/emission plates. Any suggestions. G C has removed sheetrock in room with the problem.

ALH_4

Plates

Are these the sheet metal "Omega Plates" or extruded aluminum plates? Does the system have outdoor reset?

Rich Riddle

extruded aluminum, w/outdoor reset

ALH_4

Couple More Questions

What brand and type of pex? What brand of plates?

Rich Riddle

infloor

Rich Riddle

infloor plates and infloor b-pex

UniR_3

Are they susing setback?

ALH_4

Radiant Side Track

One thing I know about pex and extruded plates is that the fit has to be just right. Too tight and it wont go in, and too loose and it makes noise. I think the Radiant Side Track probably falls into the latter category.

What to do now? I would run the system with constant circulation on the lowest heating curve possible. Other than that, there isn't much you can do other than to glue all the tube into the track, which is a horrible mess.

Paul Pollets

OD reset + automixing

We've fixed many of these systems with plate noise. A 3 or 4 way mixing valve and motor needs to be installed. This prevents hot slugs of water hitting the tubing and plates on startup. A gentle flow of modulated water temps reduces the "ticking" sound with dramatic effect. OD reset on the boiler only usually doesn't work.

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Unknown

I did a job

I did a job with concrete embedded tubings and stapled up with alum plates at differnrt temps. Customer said it made noise during the first year and thereafter its fine.. As I learned from others and here, usually the first year the tubings make expanioson noises and then stop

Rich Riddle

emission plate noise

This job also has thin slab and staple-up w/plates. It also has od reset and modulating mixing valves, tekmar controls w/logic, Munchkin 199 LP

Shawn Newcity

Transfer plate noise

If you are using outdoor reset and constant circulation you should not be getting any noise. Sounds like you have a thermostat in the system and that will give you the noise. Radiant floor should be modulated and run at the lowest possible water temperature not turned on and off. Constant circulation will give your customer the best comfort and efficiency. We use Hydronic Alternatives perc pipe and radiant side trak plates. The pipe does not give any expansion noise but we also spray 2 inches of close cell foam over all plates, piping and floor.
This gives great, even heat transfer and will not let the heat drop down. It also drops the water supply temperatures down below 100 degree's f at 20 below. Also it won't let any pipe move whatsoever. You should ask your tubing tubing manufacture if foam can be sprayed on it. Most don't like it , they are afraid the chemicals in the foam won't react well with the pipe. Hydronic Alternatives will stand behind their product. I have read a few articals lately on the increasing failure rate of B pex so I probally would not foam it. Good luck