4 ms·
I paid real money to have my ducts removed. They cause issues installing comprehensive insulation and caused hot/cold spots on the ceiling.
by fifteenforty 4y ago
I paid real money to have my ducts removed. They cause issues installing comprehensive insulation and caused hot/cold spots on the ceiling.
- metadat 4y agoHonest question: Why would one care about cold or hot spots on the ceiling? I don't spend much time up there.
- 0_____0 4y agoIt’s still a thermal path between inside and outside, and thus wastes energy if you’re trying to maintain an internal temperature that is different from the external temperature. Also there are radiative effects - hot spots on ceiling will radiate IR into your space. Just try standing under a corrugated steel roof in the summer.
- fifteenforty 4y agoApproximately 70% of the heat loss from your body is as radiated heat. Ceiling insulation is critical for thermal comfort. Have a look at the Efficiency Matrix YouTube channel videos on insulation consistency.
- Dylan16807 4y agoThe average temperature sure. But would uneven spots have that much effect on the thermal radiation I get sitting over a meter away?
- EricE 4y agoLess that 2% of insulation being out of place can waste something like 40% or some ridiculous amount of energy. It's quite nuts how even just a little break in insulation can have a significantly negative effect. A few years after I moved into my first home - a townhouse - I added some R-16 bats to the already existing R-12 insulation in the attic and it more than cut my heating bill in half. It was a three story narrow, townhouse - not that much square footage of ceiling compared to the walls/rest of the house but it made ALL the difference. If I didn't live it, I wouldn't have believed it. And I kind of did it on a whim since I didn't need that many and Lowes was having a sale on insulation. I would have done it the first week I moved in and had a couple far more comfortable winters!
- Dylan16807 4y agoOkay but that's not what I was asking. That much heat loss will affect the overall temperature.
- mrexroad 4y agoHe did answer what you asked, but I think you may be losing sight of the forest for the trees here. Maybe re-phrasing will help?
- Dylan16807 4y agoThey explained how something could cause uneven spots and low average, as far as I can tell. Because those spots leak so much. But I want to know if there is a way uneven spots could cause a problem without some effect tanking the average. What do uneven spots themselves do?
- kgwgk 4y agoThe uneven spots may indicate the presence of leaks. The leaks can have an effect on the average temperature.
- Mikeb85 4y agoHot air rises and thus heat escapes through the ceiling if there's spots that aren't well insulated.
- mrexroad 4y agoBecause in the winter the thermal energy within your room will “flow” out of those “cold spots” at surprisingly high rates; in summer those spots act as space heaters. In both scenarios they will adversely affect the ambient temp of the room. In short, whatever method you use to heat/cool the room will have to work harder and will take longer. Here’s [0] a good overview of heat flow in this context, with some hints towards the math behind if you wish to go deeper. [edit: add link] [0] https://www.energyvanguard.com/blog/Flat-or-Lumpy-How-Would-You-Like-Your-Insulation https://www.energyvanguard.com/blog/Flat-or-Lumpy-How-Would-...
- fifteenforty 4y agoI might be totally misled, but I think of it as a parallel resister circuit. One area of low resistance is extremely significant.