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Radiant Floor Heating/Zoning radiant floor heating system


QUESTION: currently my home uses a furnace to heat the house. The thermostat is located on main floor living room.
So there will always be cold/hot spots around the house. The basement will be always be 3 degrees colder.

I'm going to be building a new house and my contractor said we would be using radiant heat with 6 zones.
I assume each zone means an individual room heat control.
But yesterday I asked my contractor and he said there is only going to be 1 room that controls the heat for entire house.
I'm not familiar with radiant heat, but wouldn't it be the same as the house I live in now?  wouldn't there be cold and hot spots
if there is only 1 room that controls the heat for entire house?

ANSWER: A radiant floor heating zone is area controlled by one thermostat.

When designing a radiant floor heating system for a new home we always start with a room-by-room Manual 'J' heat load analysis. From this analysis we glean the essential information needed to properly control the temperature in every room in the house.

It is not always essential, or beneficial to control every room, but special loads such as rooms located at an outside corner, the master bedroom, bath and great room, should almost always be on their own zone/thermostat.

Insist on a room-by-room heat load analysis and get some professional radiant floor heating design help before you go further with your new radiant floor heated home design.

---------- FOLLOW-UP ----------

QUESTION: I just want to be sure of something before I talk to my contractor.
On contract it says 6 zones radiant heating.
Does 6 zones Literally mean 6 individual thermostat controls?

ANSWER: "A radiant floor heating zone is an area controlled by one thermostat."

Yes. But your general might not know this.

Never trust a general contractor with an HVAC question.

Always confirm the information given with a real HVAC technician before writing the check.  

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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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