Recent Comments and Answered Questions on Green Building Advisor

  • William Oldaker | Jan 21,2018 06:09 PM EST
    It is my understanding uplift can also occur due to the force against the side of a building attempting to push it up and or over. Think of the side of a building as a large piston, a small amount ...
  • Malcolm Taylor | Jan 21,2018 05:13 PM EST
    William, I had always understood foundation uplift only to be a problem when the soils underneath were subject to freezing. Is there another reason so suspect that your house may be subject to ...
  • Dana Dorsett | Jan 21,2018 05:07 PM EST
    Most of the modulating ducted heat pumps don't have extended temperature capacity tables below -20C/-4F, and many don't even go that low. They also don't have turn-down ratios more than about ...
  • Dana Dorsett | Jan 21,2018 04:53 PM EST
    With the fuel-use load math you don't have to derate for altitude. (In fact for most newer burners there is no derating necessary at only 5200' anyway, even if the manuals say you do, but that's ...
  • | Jan 21,2018 04:44 PM EST
    Martin: sure. But gas won't be cheap forever and doesn't play well with solar (planned none yet) and supports fracking (a problem in my area). So no opinions anyone on a central heat pump with ...
  • | Jan 21,2018 03:35 PM EST
    I like that heat load, math. I wish I seen it before. last year I ran the trane xv90 in first stage only 62,400 Btu's. in feb. it was running non stop just barley keeping up. my new heater @ ...
  • Bennett G. | Jan 21,2018 03:31 PM EST
    An alternate approach would be to seal the holes in the cans with foil HVAC tape, seal around the perimeter to the drywall with tape or caulk and use LED edison base bulbs in your current eyeball ...
  • | Jan 21,2018 02:43 PM EST
    last years winter gas bill was 494.00 with 75 gal. hot water heater. I have a 10kw sun power solar system, no power bill.
  • | Jan 21,2018 02:39 PM EST
    I looked up other homes on heater size, I figure a manual J of around 80k to 85k. r36 in ceilings r19 in walls 2x6. no floor insulation, just r19 around foundation. it can get to minus 6 to ...
  • | Jan 21,2018 02:35 PM EST
    yes the heater is over sized, I am at 5200 feet altitude. so first stage input is 70,200 second is 108,000k this new heater is only downrated at 10% the last one was 20% last heater was 93% ...
  • | Jan 21,2018 02:28 PM EST
    oh, the duct system is under the house, its set up like a mini basement. I close the vents in winter. its vary dry in NV 20% humidity.
  • Dana Dorsett | Jan 21,2018 02:17 PM EST
    Not to be throwing gasoline on a brush fire... A high stage of 120,000 BTU/hr (in or out) is 3x or more oversized for most houses in the US, 2x oversized even for fairly leaky poorly insulated ...
  • | Jan 21,2018 02:17 PM EST
    I have 12 vents 8-8" 3-4" 1-6" the duct system is a pinto, no point in putting racing tires on it. I should of had it redesigned for two smaller heaters, but now I have a new heater, so ill have ...
  • | Jan 21,2018 01:57 PM EST
    thanks, they did the heater and ac uint in 2004. the heater failed in oct. my new heater installer pointed out how it was installed wrong. it had a cracked cold header. I sent the first ...
  • Steve Knapp CZ 3A Georgia | Jan 21,2018 01:00 PM EST
    It is likely you have Asian Ladybugs. They are relentless when looking for a comfortable overwintering spot. I have it fairly tight, but some number still manage to get inside each year. I usually ...
  • stephen sheehy | Jan 21,2018 12:49 PM EST
    If it's any consolation, they are carnivorous. They eat aphids and similar bugs.
  • rich cowen | Jan 21,2018 12:00 PM EST
    These are the options I wanted to list above (spam filter wouldn't let me add links): a) Deltamethrin 4.75% soution (can be mixed with water and sprayed in corners or foundation areas) like ...
  • Walter Ahlgrim | Jan 21,2018 10:57 AM EST
    From your photos is look like you duct work is inside the thermo envelope. If that is true then the leaks are irrelevant because all the heated air is staying in the home. It seems you ...
  • Jonathan Lawrence CZ 4A New Jersey | Jan 21,2018 10:36 AM EST
    To echo what Andrew said, some of these flush mount, pancake style LED's have beam spreads as high as 120 degrees, and you will get all of that in a high ceiling.
  • andrew c | Jan 21,2018 07:58 AM EST
    Regarding gimbals - I found that the LED retrofit lights that I use have a much larger beam angle than the recessed lights that they replace. I currently have several standard LED retrofit ...
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