Consider a source duct from the furnace/AC. The ducts run in a vented crawlspace. The floors atop the crawlspace are a mix of hardwood and kitchen vinyl.
The symptoms are:
- the longer run vents aren't blowing as hot as the short run vents. They've just been foil-taped to ensure no leakage.
- the furnace runs longer to heat the house; the thermostat is in the room with the longest duct vents.
Does it make sense, or is it recommended to insulate these metal ducts? Currently considering these products:
- Reflectix foil wrap - reflective bubble wrap. Claiming an R-value of 4. Unsure if this R-value is worth the time/cost!
- fiberglass batt with foil backing
House is in a climate that sees -15 C through 35 C. That's 5 F through 95 F.
- When should metal ducts in a crawlspace be insulated?
- What products are best suited to insulate ducts?
- What R-value insulation should be considered satisfactory?