Dale. Please keep in mind that some of us are talking about heating the interior of a house while I and others are talking about melting snow and ice off of a walkway or driveway. I know it is done because there are homes right here in Bowling Green that have heated driveways. The electric company had to run a 400 amp service to those homes.
Regards. Max. K 4 O D S. Email: m...@maxsmusicplace.com Transistor site http://www.funwithtransistors.net Vacuum tube site: http://www.funwithtubes.net Music site: http://www.maxsmusicplace.com To subscribe to the fun with transistors group send an email to. funwithtransistors-subscr...@yahoogroups.com To subscribe to the fun with tubes group send an email to, funwithtubes-subscr...@yahoogroups.com ----- Original Message ----- From: "Dale Leavens" <dleav...@puc.net> To: <blindhandyman@yahoogroups.com> Sent: Wednesday, February 24, 2010 9:26 PM Subject: Re: [BlindHandyMan] Radiant floor heating. >I don't believe that for a moment. > > If it is below freezing it is going to take a lot of heat just to raise > the temperature of the surface above freezing. A cement walkway has a lot > of mass to bring up to temperature. Then there is the latent heat. it > takes something like 40 calories of energy to change the state of water > from solid to liquid alone without actually raising the temperature. > > finally, you need to heat enough area to keep the snow and ice liquid > distant enough for it to run away and not just freeze again. > > In locations where one only gets occasional snow and ice and the ambient > temperature does not drop much below freezing then electric may be > effective. Other locations like small areas, steps which are sheltered for > example may be cost effective. Even the hot water systems aren't widely > used except under a loading area like for example an ambulance entrance > and that usually under a roof and behind a wall. The ambient atmosphere > will draw huge amounts of heat off a surface very effectively. > > > If I was Han Solo I'd probably pet my wookie > ----- Original Message ----- > From: Michael baldwin > To: blindhandyman@yahoogroups.com > Sent: Wednesday, February 24, 2010 9:17 PM > Subject: RE: [BlindHandyMan] Radiant floor heating. > > > > I installed the SunTouch brand in our last house, and it was great on the > feet. It didn't raise our electric bill by any noticeable difference. I > installed 45 square feet on a 120 volt system. After the tiles were > warmed > up, it never really ran that much. > > I am now installing it here at our new place, under the tile. it is > expensive to install. I think it was over $300 for the 30 inch wide by 14 > foot long mat. i tried to find the watts per square foot on there site, > but > was unable to. I know i saw it there before. > > So, there is my recommendation for a brand if you want to do this. > > It does look like they have heating mats for the snow. 120 volt mats draw > 36 watts per square foot, and 240 volt ones draw 50 watts per square > foot. > There is a sensor, so they only operate when it is snowing, so unless you > get a lot of snow, or are doing a large drive way, the cost would not be > all that bad. > > Michael > > _____ > > From: blindhandyman@yahoogroups.com > [mailto:blindhandy...@yahoogroups.com] > On Behalf Of Dan Rossi > Sent: Wednesday, February 24, 2010 7:03 PM > To: blindhandyman@yahoogroups.com > Subject: [BlindHandyMan] Radiant floor heating. > > I've been doing a lot of research into heated floors. There are two main > kinds of radiant floors, electric or hydronic (water). You can bury pipes > in the cement floor, or place them in the joist bays beneath a wood > floor, > then use hot water flowing through the pipes to heat the floor. > > You can also use electric mesh mats under a layer of cement or cyramic > tile to heat the floor. Depending on where you live, this could be pretty > expensive. > > Heating a floor inside a house is a lot less expensive than heating a > driveway or sidewalk. Electrically heating a driveway to melt snow would > be for the rich only I would expect. heating the floor in the house would > be much more cost effective. > > -- > Blue skies. > Dan Rossi > Carnegie Mellon University. > E-Mail: d...@andrew. <mailto:dr25%40andrew.cmu.edu> cmu.edu > Tel: (412) 268-9081 > > [Non-text portions of this message have been removed] > > > > > > [Non-text portions of this message have been removed] > > > > ------------------------------------ > > Send any questions regarding list management to: > blindhandyman-ow...@yahoogroups.com > To listen to the show archives go to link > http://www.acbradio.org/pweb/index.php?module=pagemaster&PAGE_user_op=view_page&PAGE_id=33&MMN_position=47:29 > Or > ftp://ftp.acbradio.org/acbradio-archives/handyman/ > > The Pod Cast address for the Blind Handy Man Show is. > http://www.acbradio.org/news/xml/podcast.php?pgm=saturday > > Visit The Blind Handy Man Files Page To Review Contributions From Various > List Members At The Following address: > http://www.jaws-users.com/JAWS/handyman/ > > Visit the archives page at the following address > http://www.mail-archive.com/blindhandyman@yahoogroups.com/ > > If you would like to join the JAWS Users List, then visit the following > address for more information: > http://www.jaws-users.com/ > For a complete list of email commands pertaining to the Blind Handy Man > list just send a blank message to: > blindhandyman-h...@yahoogroups.comyahoo! 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