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Radiant Floor Heating/Consultation/Design radiant floor heating with wood boiler in Alaska


We are building a 6700 sf, 3 level (walk out basement + 2), green home in Talkeetna, Alaska.  The house is dried in and "out-sulated." There is radiant in the basement slab.  

We plan to use gypcrete on the main floor and baseboard on the 3rd floor.  We own and will install a wood gassification boiler & plan to add a backup heat source (TBD), we will install 2000 gallon water battery (4-500 gallon tanks), and future solar HW, there are 3 - 80 gallon expansion tanks.

The mechanical room is 20'x17' and our home town plumber cannot figure out how to organize the equipment and the manifolds into the room.  What experience do you have, if any, with this type of system and if so, would you consult with our plumber on the design? If you don't have experience or are not interested in the project, can you recommend an "expert?"

Badger Boiler Wood boiler radiant floors Alaska
Badger Boiler Wood boi  
I have been designing and installing low-temperature hydronic radiant floor heating systems since 1987 and wood boiler systems for the last 20 years or so. In fact, I have an outdoor wood boiler, with a propane burning condensing boiler backup, operating near Kasilof Alaska right now.

Yours seems like a good basic plan, but for one common design flaw i.e. adding a low-mass, high temperature emitter (fin-tube baseboard) to a radiant floor heating system, that is decidedly high-mass and low-temperature. I would suggest using European-style steel panel radiators more closely sized to the lower design temperatures you will enjoy with the radiant slab and gypcrete floors.

Please forward a drawing (CAD or pdf) to my attention.

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Morgan M. Audetat


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...........


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 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.

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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