Recent Q&A

• Any experiences with Wool Life PureWool blown insulation?

  Hi GBA,I'm looking into using blown wool for an attic insulation project. In looking into vendor options, I tripped over Wool Life (wool.life).They claim their wool product is spun in…

• How to extend an HRV intake

  嗨,伙计们,我需要extend an HRV intake from just above the foundation (and therefore just above grade) to a better height.I'd like to hear from any of you who…

• Arctic Heat Pumps: any experience or installs out there?

  Hi,I'm wondering if anyone in the GBA community has experience with Arctic heat pumps. We are looking into cutting edge options for point source cooling and are interested in what…

• Using Coolcalc.com for DIY Manual J calculation

  DIY here:I recently discovered coolcalc.com and am grooving on being able to more closely (I don't think I'm a sizing fetishist ... yet) model my structure for sizing of a…

• Dealing with a high heat load room: skylight load

  Hi GBA, I've recently performed a Manual J myself on coolcalc. (this is probably the 4th time I've sized the house over the years, using a pro, loadcalc.net, and coolcalc).…

• Sizing a drain water heat recovery unit and combining DWHR with future graywater system

  Hi all, I have the opportunity to retrofit a drain water heat recovery unit into my home. I also, due to some plumbing oddities have the opportunity to plan for…

• Manual D/J questions

  Hi all, Awhile back, I had a Manual D/J performed. I reviewed it the best I could at the time but now that I'm looking into a system change-out and…

• Hot Spot Energy: anyone heard of them or used their products?

  Tripped over a company (small?) I'd never heard of with neat energy recovery products called hotspotenergy. Anyone ever worked with them or their products? I'm particularly interested in the ac…

• Effect of different exterior wall insulation schemes on sound control

  Hi all, While reading the recent write-up of an exterior insulation Q&A (//m.etiketa4.com/blogs/dept/qa-spotlight/making-case-exterior-foam-insulation), I noticed that no one mentioned any benefit impact to exterior sound transmission by increasing cavity insulation…

• Good source for minisplit turndown ratios and turndown vs. HSPF / SEER?

  Hi, I was going to ask this on this thread: But realized it was a separate question.