Radiant Floor Heating/snow melting -driveway

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Question
in a 26'x40' x 6'' driveway what size pipe & spacing is needed in eastern mt. climate facing  north west it gets full sun in afternoon and wind blows snow off mostly plumber is saying 9'' o.c. 3/4''pex can it bend that tite with out crimping

Answer
Badger Snow/Ice Melting Systems
Badger Snow/Ice Meltin  
There is more to driveway snow/ice melting than PEX size and spacing--though you have mentioned some of the most important variables i.e. location (I have been to eastern Montana and found it a pretty big place), orientation (many of our snow/ice melting systems serve drives and sidewalks that never see the sun), wind speed (can easily double the required boilers output) and most importantly the Class of snow/ice melting system you require.

The last is more about expectations for performance based design.

See my web page for a description of the three classes of Snow/Ice melting.

http://www.badgerboilerservice.com/snowmelt.html

PEX size and spacing, or turn radius for that matter, is one of the last things I decide when designing snow/ice melting for a driveway but certainly one of the most important.

The manufacturer will specify the the minimum turn radius for their various radiant floor tubing. Generally, the smaller the tube, the shorter the turn.

If you send a drawing we can confirm the specifications and send back a CAD drawing denoting tube size, length, spacing. Not to mention Btu/sq.ft., flow rates, pumps, design water temperature, design surface temperature, gas boiler size and the concentration of antifreeze for snow/ice melting in Eastern Montana...no, it is not a 50/50 mix.  

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Morgan M. Audetat

Expertise

Radiant panel heating design, including floors and ceilings, European wall panels and snow melting for residential and light commercial buildings..............................................................-Master of Steam and Hot Water,City of Minneapolis....................................................--- Master Plumber, State of Minnesota...........

Experience

30 years..... Charter Board Member - Radiant Panel Association, former manufacturer of condensing boilers, former national distributor of radiant floor products, son and apprentice of mechanical & plumbing contractor. Current owner---www.BadgerRadiantDesigns.com---Minneapolis mechanical/plumbing contractor specializing in hydronic based, integrated HVAC systems. Radiant floor heating/cooling. Snow Melting. Condensing Boilers. Indirect water heaters. System design, consulting and technical training world-wide. Licensed contractor, designer, installer and consultant.

Education/Credentials
B.S. University WI 1981 CONTINUING EDUCATION: Viessmann Condensing boiler and Solar water heating certification 2010, N.D.S.U. Lead Worker RRP certification 2010, Knight condensing boiler certification 2009, Wrightsoft Manual J CAD certification 2009, RPA Designer & Installer Certification 2008, Nate Hydronic/Forced Air Certification 2008, Uponor/Wirsbo advanced design school certification 2007, Buderus Wall-hung certification 2007, Power Limited License (low voltage controls) 40 CE credits 2005, Basic Hydronic Certification IPEX & Northern Alberta Institute of Technology 1998, Charter Board Member - Radiant Panel Association 1994, Residential Off-Electric to Hydronic Conversion Heating School Canadian Hydronics Council 1994, B&G Little Red School House 1993, Rood Utilities (now Auburn Technical Institute) Oil Burner School 1993 ,Tekmar Controls residential and commercial 1993, Division Manager and Advanced Hydronic Seminar Instructor for the first Exclusively Hydronic Radiant Floor Distributor in the USA 1990, Hydronic Radiant Heating Association Workshop participant with Richard c. Bourne, PE spring 1988, Master Plumbing, Hydronic, Solar Course Red Rocks Community College 1987.

Awards and Honors
2009 System Showcase Award - Radiant Panel Association

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