What is the best exterior wall insulation - HVAC-Talk
2008年3月24日 · super insulation = R60 in ceiling, R40 in wall, R10 under slabs. adding some foam inside of wood framing will help seal the wall -- be sure to not use foam which may shrink, say after 5y. having foam between framing will not stop 'bridging'. foam should prevent having bridging across gaps common with batts.
R-value ext. walls 110 yr old brick house for Manual-J - HVAC-Talk
2007年7月28日 · The only option for exterior insulation will be to add 2" tongue and groove type polystyrene insulation on top of the plaster, and fur out the drywall with some steel channel. That may be a short term option for the exterior walls that need some serious plaster repair (and our bedroom and master bath), but to do the entire house like that will ...
Cons of running duct up exterior wall? - HVAC-Talk
2008年10月22日 · With all the cost and hassle of exterior ducts, why not just put a seperate system in the attic upstairs. then you have 2 zones, which has a lot of advantages. The downside is you have 2 systems to purchase and maintain. Sometimes high velocity makes sense for these types of rennovations.
Condensation on exposed basement walls - HVAC-Talk
2007年1月19日 · sounds like vapor barrier is not sealed properly. i would not finish basement until corrected, use the green board when you do sheetrock. The condensation needs to be solved before you drywall. Make sure the vapor barrier is sealed correctly. Put a humidity meter in the basement and keep the humidity below 50%.
Hvac close door - HVAC-Talk
2024年8月17日 · As to your garage situation it goes back to the insulation. Yes you are adding sq footage but exterior walls only 2ish of the three exterior walls of the garage. Say your garage is just a straight extension of the end of your house, then only the front and back walls are added as the area of the end wall of the house was already included.
Which way should ceiling registers point -- into or out of room?
2007年12月20日 · If it is closer, the high velocity can cause drafts, noise, poor mixing of room air, stratification, and streaking. If it is close to the outside wall and pointed inwards the the drop will most likely be in the occupied zone causing drafts. Ideally ceiling diffusers should be near the middle of the room. Reply.
Cooling small bedrooms with minisplits - HVAC-Talk
2021年2月1日 · Coolcalc estimated my cooling load was only 2367 btu for those three rooms. The master bedroom is 191 sq ft, including the full-wall length closet, 9 foot tall ceilings, three windows of 70 inches by 31 inches. The second bedroom, which shares a wall with master, is 145 sq ft, with two windows same size as master.
Can insulation be used to seal up registers and returns? - HVAC-Talk
2014年8月20日 · Anything penetrating floors/ ceilings/ walls and connecting spaces must be a contained system, such as ducts connected to the HVAC equipment or cap them off as fireblocks. Any ducts taking up space in stud bays on exterior walls must be packed with insulation equivalent to the code requirements for your DOE zone and fireblocked.
Insulation over furnace pvc vent pipe - HVAC-Talk
2012年9月23日 · Insulation over furnace pvc vent pipe. Hi, My equipment room has insulated walls next to the basement living area, but no insulation on the ceiling where there is a family room. I was planning on putting some fiberglass batts up there, vapor barrier against the floor (hot side). The direct vent/air intact pvc pipes are tucked between rafters.
a/c duct condensation behind wall insulation - HVAC-Talk
2012年9月4日 · The wall section is 2x6 stud consisting of drywall on both sides, with R13 paper backed fiberglass insulation between the studs. The duct is behind the insulation between the insulation paper and interior drywall of the family room. This leaves about 3 inches air gap between the insulation and the drywall on either side of the duct.