Radiant Heating & Cooling w/ Messana | Episode 30
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- Опубликовано: 14 авг 2022
- Alessandro Arnulfo is the Founder and CEO of Messana, a San Francisco based company that specializes in radiant heating and cooling technologies. Their goal is to move the HVAC industry away from traditional convection methods towards radiant heating and cooling, a more eco-friendly product.
Link to my Patreon page: / belinda_carr
Messana
Website: radiantcooling.com/
Instagram: / messana.tech
#hvac #radiant #ecofriendly #sustainability 
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Its incredible that the questions I am thinking of during this interview and others, Belinda fires them off. Challenging the technology in a professional, courteous manner but getting to the "meat and potatoes" of cost, potential roadblocks and future plans. Another excellent show, I really look forward to these.
Thank you for the kind words!
Correction: Daikin does sell heat pumps in the USA. I'm looking forward to Belinda's follow up evaluating the potential energy savings and appropriateness of radiant panels with conditioned ventilation systems in each climate zone.
I'm doing a deep energy retrofit project in Toronto (Canada) and following some building science principles. One of the primary constraints we decided on was to avoid forced air systems for heating and cooling the house. Messana is at the top of our list for these systems and their control system is, by all accounts, second to none, but we are also considering alternatives as the Canadian market is not well established for radiant (ceiling/wall) panel systems, except in commercial work. We are looking at the Beka Klima system as well as Aermec's Kilma Belt system. Beka is similar to Messana, but I don't know what, if any, control system is used. Aermec's system is installed more like crown molding as opposed to ceiling/wall panels, but they have a condensate drain so control systems aren't as critical for humidity management. There are few, if any, incentives to move away from forced air systems and unless the costs come down significantly, the residential adoption rate will be relegated to the luxury/custom home market. I'd be interested in an episode that contrasts/compares these radiant systems.
Thanks for bringing Aermec's tech to my attention! I hadn't heard about them. I agree, cost constraints are going to prevent wide adoption of this technology, unfortunately. It seems to have so much potential and I'd love to experience a space with radiant cooling.
I’ve been waiting for this one! Thank you so much for this! I really want to go this route on a new build but there isn’t much info out there on it!
THANKS BELINDA …FOR SHARING…A TECHNOLOGY THAT HAS A FUTURE 🤗👍😎💚💚💚
HOW DOES IT COMPARE IN PRICE TO MORE TRADITIONAL AIR CONDITIONING SYSTEMS?
Can you please create a video comparing heat output of the various available Hydro Heating solution out right now. Im trying to decide between Quick Track , Upror , Eco Boards radiant heating & Warmboards. There is no information comparing these systems.
I think a big issue is a lack of code requirement. The apartment building I live in is dangerously hot in the summer, and there's no requirement for our private housing firm to invest in any hvac, let alone Hydronic cooling/heating. If there was more regulation forcing real estate firms to invest where it's necessary the market would have a lot more demand. Issue is these housing conglomerates can just go without installing necessary hvac, so they do. We end up stuck with in window units and portable ACs which are inefficient compared to central cooling and frankly hazardous to our electrical grid
I find the portable window units to be better for the tenants. They pay the utilities in some cases and choose not to cool the entire home. A well insulated home is what is needed.
In this area, the new buildings with central HVAC literally cost three times the money to live in. This isn't a benefit to the renter.
With time old housing stock gets phased out through demolition or substantial remodeling. Affordable housing is goal which is increasingly harder to reach.
Why would you involve big daddy regulations into a legitimate market and business. Government and regulations kill all progress - do not be part of that, please.
Yea but sun is casting light yours a dark room stays dark. Reason is light has photons say 380-740 nm.
The only thing I wish they would do is use cork insulation as the backing as opposed to foam.
I am not a fan of foam insulation due to the potential VOCs and also in fires. Cork seems to be a much more friendly and fire resistant material, albeit not as good R values as foam.
These videos are fascinating, but cost seems to be the barrier that will prevent any of these products from ever going mainstream. With the wildly inflated cost of new construction, even an optimistic assumption of a high performance home costing 20% more than a code minimum home could be tens of thousands of dollars more. Especially in regions with low energy costs, assuming 90% savings in heating and cooling costs, the system may not pay for itself before it reaches its end of life and needs to be replaced anyway. Perhaps the government should consider subsidies for upgrading the millions of homes in the US instead of tax incentives for expensive electric cars and solar panels that only benefit a very small portion of the population and have very little effect on reducing energy usage as a whole.
I agree with your perspective, government subsidies might be the only way people will get on board with more sustainable buildings.
The analogy of radiant heating of the ceiling being like the sun is ludicrous. The sun emits light waves which then heat the surface where the light waves land. That is nothing like radiant heating the ceiling. Personally I do not want water running through my walls and my ceilings everywhere because if there's a leak it destroys the house. Also I live in the midwest where the humidity is really high so condensation would be a serious concern. I just don't buy what this guy is selling.
The sunlight vs radiant heat panel is not an analogy. They are the same process: radiation. The distinction is sunlight radiates photons of visible light at 300-700 nanometers that cause objects on earth to heat up on contact. A 120F radiant ceiling radiates at around 9,000 nanometers, which is less energy but the same form. Radiation is a confusing subject! Try this next time you're in front of a fire: "feel" the heat emanating from the flame (that's the sun) then from the hot rock or unlit coal (that's the radiant panel). Put a piece of paper in between - the heat is immediately blocked.
As for Midwest and humidity you're correct that this system is inappropriate for an existing house with high air infiltration or unconditioned ventilation. But this may be effective in new, air tight houses with conditioned ventilation air. It would be enlightening to read a BTU or kWh air vs water comparison based on high efficiency heat pumps or hybrid gas/electric systems.
@@ciclotan I get that but in the summer the heat in my house goes up to the upper story and the cold goes down into the basement. If I have a radiant heat source in the ceiling it's not going to want to work its way down to the floor very well. It's going to want to stay up near the ceiling. And with a multi-storied house this is going to become even more of a problem. Personally I think putting a radiant heated floor in the basement and allowing that heat to work its way up stairs is the way to do heating. At least in my house. As for cooling it would be nice if it worked its way from the top down but I really don't want water flowing through my whole house because if there's ever a leak it will destroy parts of my house. Water damage is horrible.
Thanks for explaining this so clearly, Alex!
I understand the concern with water damage, Aaron. However, the directional flow you are referring to is a concern with convection/air movement. Perhaps you mean radiation would heat up surfaces and then eventually air in the basement which would slowly move upward?