Recent Q&A

• Gree Minisplit Performance Numbers – too good to be true?

  We have a 24K multi unit spec'ed for a DER in northern NH. In the original contract the unit was said to be the Fujitsu AOU24RLXFZH. The contractor is now…

• Minisplit ice and pan heaters

  We recently had a Mitsubishi FH12NA hooked up. Its been running for 6 days with a few below zero nights (northern NH). The ice formed below the pan is substantial…

• Air sealing baffles

  Just re-reading Joe's roof venting article in FHB and wondering about a common warning - that baffles (even for a vented attic) MUST be air sealed. If we assume that…

• Purchasing cellulose

  We are doing a large retrofit and will be blowing our own cellulose. The project will use 18K to 20K lbs of cellulose. Where do people typically purchase their cellulose…

• Roofing without sheathing

  We are currently doing a retrofit that includes a vented attic with lots of cellulose. The baffles will be ripped PIC with FG facings. The current roof is metal over…

• Cellulose density in rafters

  In a retrofit project we are looking at insulating 24" deep Larsen-esque rafter cavities with cellulose. This will be vented with baffles. I have been doing some research to choose…

• Comments always trigger the spam filter

  Does anybody else have this problem? There are no links, every word is carefully chosen (nothing to set off red flags) and still, if its a comment on a thread,…

• Why insulate stemwalls?

  slab-on-grade建设有3insulation locations - edge, sub-slab, and stemwall (down to the footings). In FHB 245, Martin says it is important to insulate stemwalls to a…

• Slab-on-grade exterior threshold detail

  I am beginning a DER of an old commercial building - our new workshop - in zone 6, northern NH. The framed floor on piers is first being upgraded with…