51–60 of 133 posts
I bought a CO2 monitor. What a shock it was to see my office go over 1000ppm. I had no idea. Now I crack the window, and tweak that till the CO2 stays below 600 or thereabouts.
Why would you want airtight home (unless you are WW3 prepper)? Sounds to me like asking for problems with mold and stale air. But I guess I should not be surprised seeing supposedly intelligent people wearing face masks for health reasons.
Very efficient way of keeping your house warm. That's why it's used a lot in northern European countries.
I bought a CO2 monitor. What a shock it was to see my office go over 1000ppm. I had no idea. Now I crack the window, and tweak that till the CO2 stays below 600 or thereabouts.
Aren’t there heat exchanging ventillation systems that do this (maybe even better) without wasting a ton of energy?
Why would you want airtight home (unless you are WW3 prepper)? Sounds to me like asking for problems with mold and stale air. But I guess I should not be surprised seeing supposedly intelligent people wearing face masks for health reasons.
Earlier quoted context omitted.
Aren’t there heat exchanging ventillation systems that do this (maybe even better) without wasting a ton of energy?
Opening a window is free, and not everyone has the freedom to modify their living arrangements(rented houses etc)
We did something similar recently. This looks like standard, low cost modern construction to me. If you’re in a warmish climate (like the SF bay area), you probably don’t want to insulate the concrete slab. You get lots of passive heating of the slab in winter already, and having the ground suck that heat out is a win almost year round. South facing windows can be designed with an eave, etc to lower passive heating i…
Insulating the slab doesn't matter as much as it may appear, as the ground "below" the house eventually reaches equilibrium. Insulating the side foundation walls can be much more useful. http://www.sensiblehouse.org/nrg_heatloss.htm
IIRC it took c. 18 months for the floor to reach equilibrium, but once there, virtually no other heating was required, winter or summer (in the UK).
Air tight homes and health problems. https://www.cibsejournal.com/news/airtight-new-homes-creatin...
FTA: > It was to determine how well the HRVs How many of those homes tested installed a proper mechanical ventilation system? Anyone that is serious about air tightness will tell you that you need to manage the air transfer with an HRV or an ERV so it's filtered, controlled, and avoids these problems. --- I found the study you are quoting: https://pureadmin.qub.ac.uk/ws/portalfiles/portal/31281945/C... Results from t…
Earlier quoted context omitted.
> "The unit has produced a public awareness film urging people to ventilate their homes properly by ‘keeping vents or windows open when cooking, showering and cleaning..." Why showering?
Why cooking? Only minority of people in developed countries cook on gas nowadays.
But it's pointless to go to such lengths for airtightness if you have massive thermal bridges in the walls and roof in so many places.
If you want to be really efficient, the insulation should be constant thickness with no nails or screws poking into it, and certainly no bits of wood across it. Since the insulation has no mechanical strength, that really means you're building two houses - an inner house and an outer house, both of which need to stand up without the help of the other.
I bought a CO2 monitor. What a shock it was to see my office go over 1000ppm. I had no idea. Now I crack the window, and tweak that till the CO2 stays below 600 or thereabouts.
Aren’t there heat exchanging ventillation systems that do this (maybe even better) without wasting a ton of energy?
I have a one-way system, an air pump that sucks air in through vents and out through the ceiling in a few points; I have it set to the lowest at all times because it produces a constant noise otherwise. We usually have our bedroom windows open and the back door open a crack, it should be fine even if it's not the most energy efficient.
Call me selfish, but I'd like my country to crank up electricity production, reduce its usage by datacenter and industry, and use it to heat or cool houses instead.