max tile floor temp?

PG

I'm putting hyd. rad. in the floor of a kitchen and family room. Both rooms added on over crawl (I will insulate the heck out of the crawl!) I'd like to do hardwood floor in the family room and tile(ceramic) the kitchen. Problem.......wife likes it hot (I'm talking direct heat she used to ocassionally nod off in front of her favorite heat duct in our old house). So I'd like to have the option to crank up the infloor ocassionally. What was that general rule on to hot to be uncomfy for a floor? Is the 85 degrees (max for hardwood?) going to please my bride? Whats the max for tile? Also what's a fair response time if we come home and want fast heat? (Also assume a gyp pour).

Thanks for heating the little one up!

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rb_6

ASHRAE says...

“Occupants may feel uncomfortable due to contact with floor surfaces that are too warm or too cool. The temperature of the floor, rather than the material of the floor covering, is the most important factor for foot thermal comfort...”

PG

Thank You......but outside the box?

I appreciate the post but would anyone read my first post and think outside the box. I mean really read it all. I don't mean to run the floor at 90 degrees (or whatever?) a lot, but could I do it ocassionally? Would I destroy the tile? Would I destroy the hardwood?

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PG

Still havn't got the hang of the Wall!

My second post was actually a response to "ASHRAE says....." post.

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Mark Hunt

Patrick


Max floor surface temp for hardwood is 80*.

I will let bathroom tile floors go up to 90* since you aren't in there very long and when you are in there you are quite often naked!

DO NOT set back your rad floors! Set it and forget it. Your bride will NOT be happy waiting for the floor to respond, I promise.

Good luck!

Mark H

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jim lockard

I am hearing U

Patrick --I have cermic tile in my kitchen and I can run it up to where you can all most not walk on it so far no problems. As for wood Mark E pointed out sometime ago that the sun shining through glass will raise the surface tempture of wood to over 100 degrees I do not think I would go that high but just so you know. Best Wishes J.Lockard
P.S Is she throwing dishes yet LOL??

Weezbo

Radiant Patrick can only be ramped just so fast....

hotter and hotter fluids sorta hit on a saturation level of what they are contained in and the ability of that material to disperse heat to a colder space. ramping it simply with hotter supplies wont necessasarily work,planning can to a certain degree. you can shoot some heat to the tubing mind you,and this is just my take on the deal to have it(the zone)crank up 8 degrees two and a half hours before you got home,and then turn itself back down to normal room temp about 20 mins before you are opening the doorwell, thats probably just about whatever it can do in the way of fast.other than that by pass that idea and install a pannel rad with a trv or a toe kick heater ,or bench heater or something that can blast heat over the space like an electric umbrella:)with foot attachments:)

PG

Thanks a bunch !!

Do you think she is reading this? Life is hard enough.

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PG

Thanks



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PG

Thanks Weezbo. Could I crack tile heating it to fast?



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Mark Hunt

You won't crack the tile


but make sure that the grout has had plenty of time to cure before you fire the system up. You could dry it out and then you will have an unhappy bride again.

Best wishes!

Mark H

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PG

I'm assuming.........

you mean I won't crack it by being too hot. What about thermal shock , too much hot water to quick?

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Weezbo

Ithought my electric umbrella with foot attachmens ...

was "out side the Box" *~/:) tile can taake some heat ... i rally think bumping the heat up a couple hours ahead of time to like78 80 degrees would doit.it will ramp as fast as it can and cop a residual from the experience:)

Steve Eayrs

Patrick, you could always..........

leave the zone for the tile area in question, in a manual open position and just let it always operate, whenever any of the zones in the system call for heat. (radiant part of system is running on one pump, w/ telestats/zone vlvs for zoning) My wife likes the bathroom tile nice and warm too. The zone for the bathroom was stuck open and I found she is happier since I just didn't bother to fix it. One of the few honey-dos that I don't have to do.
Not something I would usually do on someone elses house, but maybe outside the box enough for ya.


Steve

Mark Hunt

Impossible


unless you have a nuclear power plant driving it.

Just set a temperature and leave it alone.

Physical comfort combined with psychological comfort! It doesn't get any better than that!

Mark H

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PG

Good enough



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rod robbins

One thing I found with the kitchen was that my wife also liked the floor warm but when the kitchen zone is raised and the floors feel nice on your bare feet but combined with the lighting heat you need to be naked in the kitchen and it will still be to hot.I reduced the supply to a trikle and she thinks its fine.
ps Mabee some of you want to see your wife naked but i dont

PG

Maybe once in awhile.



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Mitch_4

i Dont know

what does she look like?

Just a joke...

Mitch

PG

She looks pretty good actually.........



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rb_6

the floor temp graph

is the result of ASHRAE research published in ASHRAE/ANSI Standard 55 -2004 , Thermal Enviromental Conditions for Human Occupancy.

What it says is the hotter the floor the more complaints one will generate. It was hot floors which generated the health warnings against floor heating in Europe back in the 90's.

Jumping from 84 deg F to 94 deg F increases the dissatisfaction from 10% of occupants to 30%.

Also as the floor temperature is increased the body is exposed to an ever expanding difference in temperatures which also causes complaints. Think about standing next to a cold window or sitting in front of the fireplace...this temperature difference from the front to back/top to bottom is called radiant asymmetry and the bigger the spread the more people will complain. Finally, as the floor temperature is increased so is the air temperature difference between the ankles and head which causes further complaints.

If true interior comfort is desired then the enviromental specifications below would make the majority of humans happy...if that were the goal.

PG

Honestly........i'm impressed. Thanks



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