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5 things you didn’t know about radiant heating

  • August 20, 2014
  • ConstructionDIY
  • 12 Comments
5 things you didn’t know about radiant heating

If you’ve been following along you know that we’ve finally got some walls up in this place & things are progressing. But we realized that we didn’t take any real time to fill you in on all the important stuff that happened behind the walls. So today we’re taking you back to talk about radiant heating. You might remember that earlier this year, Kes & I took some time off from our day jobs to work on installing our radiant heating system.  For those of you that aren’t sure what radiant heating is really all about, I thought I’d break it down into a few short points. So here we go…

5 Things You Didn't Know About Radiant Heating

1. There are different types:

There are 2 basic types of radiant systems: electric and hydronic. Electric radiant uses zigzagging loops of resistance wire that are usually pre-attached to mats which allows for easy installation. The heat mats are then installed over the subfloor, typically in a bed of thin-set mortar. Electric radiant systems tend to be easier to install, but with rising hydro costs, these systems are usually limited to small areas like bathrooms or kitchens & used as a supplemental heat source. Hydronic radiant systems, on the other hand are generally larger systems designed to heat an entire house. In hydronic radiant, water is circulated through loops of PEX tubing beneath the floors & heated to between 35 and 50 degrees Celsius by a boiler (that’s about 100 to 120 degrees Fahrenheit for all our Amerifriends). There are various ways that the pex can be installed: over an existing concrete slab in cement, embedded within a slab in specially designed subfloor panels that contain channels for the tubing to fit into, or stapled underneath the sub-flooring (how we installed ours).

2. It’s quiet

Have you ever found yourself adjusting your tv volume because the furnace kicked in & it sounds like you’re driving on the highway with the windows down? Or had to think twice about whether those clanks, tinks & groans you heard were from your radiator or some kind of paranormal activity? Well the good news is that by comparison, radiant floors are virtually silent. The bad news: if you’re still hearing those wooshes, clanks & groans, you might want to call in an exorcist.

3. It’s energy efficient (often more so than conventional forced air systems)

A radiant heat system by design is a much more effective method to distribute heat. Forced-air systems can efficiently heat the air, but they lose efficiency when you factor in distributing it throughout the house. Much of the energy ends up trapped in the air higher up in the room. We’ve all seen those “92% efficiency” ratings on a forced-air furnace. But all that really means is the furnace itself is efficient. It doesn’t have a whole lot to do with the method used to distribute the warmed air. Radiant heat systems can actually be as much as 30-40% more efficient than forced-air systems. Why the difference? Radiant heat warms the solid objects in the room which causes the air in the room to heat up as it comes in contact with those warmed objects. And because objects tend to hold heat longer than the air does, the system doesn’t need to work as hard.

4. It provides comfortable, even heat

In a conventional forced-air heating system, air blows out of the registers at well over 45 degrees Celsius and then it quickly rises to the top of the room where it sheds heat and then drops back down as it cools. This often causes the air in the room to have uncomfortably uneven temperatures. If you’ve ever been in a room where you felt a little warm under the collar, but your toes were freezing, you know what I’m talking about. Also because forced air registers tend to be located around the perimeter of the room you often end up with those areas of the feeling warmer than the rest. With radiant heat systems, on the other hand, your floors might reach 30 degrees tops on a really cold day, but as the warm air rises, it does so evenly over the entire floor. The result is more of the heat stays near the ground – where you are – instead of getting trapped up above your head!

via porcoenergy.com

5. DIY is an option

When we first started looking into the idea of having a hydronic radiant heating system and began inquiring on the cost, we had a major case of sticker shock! Every initial conversation we had with suppliers had us looking at an investment starting at upwards of $40-60K which is WAY beyond our budget. But if you know Kes, you know he isn’t one to give up on an idea that easily when he has his mind set on something. After many Google searches & Youtube tutorials we decided that installing a radiant system is not outside the realm of our capabilities. Which of course meant, that we immediately set out to find a supplier that could provide us with everything we needed. We happened across a supplier in Syracuse that builds radiant systems with a DIY install in mind and then ships the system & all the materials to you – and the best part – all at less than a THIRD of what it would have cost us to have it installed!

DIY radiant heating install

Now, having completed the first phase of our radiant install I can say with certainty that it IS INDEED a lot of work. But what it is not, is difficult work. Like anything else, stuff that is labour intensive always comes at a heavy price tag. But if you’re willing to put in the time and a little elbow grease, DIY is an option for having a radiant in-floor heating system.

Have you ever lived anywhere that had radiant heating?  Is it something you would ever consider for your home? Let us know in the comments!


Tagged

energy. efficiencyforced airin-floor heatingradiant heating

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12 Responses

  1. Meredith
    • August 20, 2014 - 7:49 am
    • Reply

    Hey guys! Great post…there were a lot of things there I didn’t know. We had considered radiant heat for our kitchen but chickened out at the price tag…wish we had known about your Syracuse connection! So pumped that you guys tackled it yourselves…day jobs, family, life and all!

    • Tash @ thedreamhouseproject
      • August 20, 2014 - 11:58 am
      • Post Author
      • Reply

      Thanks Mere! Yea the heavy price tag almost had us too. I’m pretty happy that Kes didn’t give up. 🙂

  2. beckipeckham
    • August 20, 2014 - 7:57 am
    • Reply

    This is a great post! One of my biggest regrets is not installing radiant heat in our kitchen floor, it was too expensive at the time but I think it would have been worth the extra dollars. Good on ya for doing the install yourselves! 🙂

    • Tash @ thedreamhouseproject
      • August 20, 2014 - 2:48 pm
      • Post Author
      • Reply

      Thanks Becki! Yea, taking on the install ourselves DEFINITELY made all the difference in being able to afford it.

  3. swellconditions
    • August 20, 2014 - 8:47 am
    • Reply

    Nope, never lived anywhere with radiant heating – one day I hope too though! I’ll have to show hubby this, if you can do it so can we!!

    • Tash @ thedreamhouseproject
      • August 20, 2014 - 5:16 pm
      • Post Author
      • Reply

      You definitely can!! Just takes a little time, patience & elbow grease. 🙂

  4. Last Week’s Loves: August 18th to 24th, 2014
    • August 25, 2014 - 8:27 am
    • Reply

    […] For those of you considering installing radiant heating in your homes, the Dreamhouse Project featured a great summary of things you might not know about it in this post. […]

  5. Kerry
    • August 28, 2014 - 8:39 am
    • Reply

    Totally would love to install radiant heating. Can you give me some good resources for learning how??

    • Tash @ thedreamhouseproject
      • September 1, 2014 - 10:47 am
      • Post Author
      • Reply

      Hi Kerry. Finding the right information really depends on the installation technique you’re planning on using. In general though we found Youtube to be our best friend – especially when it came to soldering the manifolds. We also posted a few videos of the staple up method for installing the pex underneath the subfloor that might be helpful. You can check out our post here: https://thedreamhouseproject.ca/2014/05/28/checkin-in-from-workcation-3-days-diy

  6. Sherry
    • August 28, 2014 - 2:19 pm
    • Reply

    Excellent post, very well written and great information! You guys did an awesome job. I plan to put radiant heating in my new Dream House next year. Looked into several options, the water & PEX seems to be best for long term. Wish I could afford geothermal but installation runs around $50,000, so that’s a no-go. But this sounds more doable. Electricity is going to go through the roof in future so all new construction should utilize radiant heating. Thanks for the help.

    • Tash @ thedreamhouseproject
      • September 1, 2014 - 10:40 am
      • Post Author
      • Reply

      Thanks so much Sherry! We looked into geothermal as well, but the price tag was definitely a huge deterrent.

  7. Tina
    • August 29, 2014 - 8:56 am
    • Reply

    Would you mind sharing who the supplier in Syracuse was? We purchased a 1880’s former B & B about 2 years ago (found there was NO INSULATION AT ALL and last winter was brutal on us, on top of an unexpected job loss the week before Christmas and not being able to find another one until the beginning of May..ugh) and we are planing on putting this type of heating in where we can. We found an outdoor would broiler that it will be hooked up to for a “can’t pass up price”. My husband found a place online that sells the clamps etc for use with PEX but we’ve been just getting the PEX itself at Lowe’s or our local hardware store. Wondering if it would be a little cheaper through where you get yours. Thanks in advance.

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