Looking for ERV recommendations for a new two level ICF residence located at 6800 ft elevation with 6001 HDD base 65 and 0 CDD base 50. Radiant floor heating only. Conditioned living space is 20,000…Continue
"I've used the CAR II regulators before. They work, but obviously it's more mechanical moving parts that might fail overtime. I've had good success using simple adjustable diffusers. Diffusers closest to the ERV will be more…"
"Thanks, Luke. I agree it wouldn't make sense to design an ERV to accommodate high interior moisture loads. I think the simplest strategy for that is to not rely on an ERV to exhaust excess interior moisture, as they're not designed for…"
"As a Rater and PH guy I have seen a number of units. You do get what you pay for. I also commission for Zehnder, about 180+ to date. Having the ability to dial in every room to meet a design spec is really special. 2 ECM fans and there…"
"When it comes to independently ducted ERV systems operating in humid climates during the summer; the high moisture event (shower), on a single exhaust branch combines with the other exhaust streams before reaching the ERV core, this lowers the total…"
"I would agree with Daniel's comments and question, is the device accurate. Over time sensors need to be tested and/or replaced. Utilize a dedicated gas sensor to compare results.
Not sure which house you were or are in that has the high CO2…"
"Thank you for all your comments. House is ICF and local code is 2018 IECC listing maximum 3 ACH50. Depending on zone and shielding selected ACH averages out about 108 CFMnatural. ASHRAE 62.2 calculation indicates 32 CFM continuous required (3 beds,…"
" I second Luke's recommendation for Panasonic, RenewAire, Zehnder, or Venmar (Broan). All good units with humidity recovery. Hook through bathrooms to encourage humidity retention. I personally would choose a Panasonic or Zehnder. The…"
"@Luke, since you work for a well-known ERV manufacturer, I'm curious if you have access to latent performance data (other than the single point @ summer conditions typically published). A graph would be ideal. I think most practitioners fail to…"
"Hello David -- Do you have an expected air tightness? What type of blower door test results are you projecting?
David is right; you should be using a low flow range hood of 300 cfm with good capture rate. Without an account for how that air will be…"
"Many ERVs, particularly those with enthalpic wheels, use only ONE motor to run two fans. The In/Out are balanced with dampers.
The ASHRE standards are guidelines. The installed ventilation system should be capable of moving at least the amount of…"
"Unfortunately I don't have anything to add here but wanted to give this post a bump as I'm a BPI Building Analyst and I'm trying to learn more about what ERV/HRV can accomplish as well as their installation. For what it's worth…"
"I think you're overreacting to the need for humidity control in your location. If indeed there's a need to remove any moisture, an ERV is the least effective way to do that. Moreover, I advise against locating an ERV supply in a closet, as…"
"Thank you for the insight David. House only has the first level walls poured, second level floor installed and they are stacking the second level ICF now. Blower door test is some time away. Need to design ventilation based on assumptions and tune…"
"I generally recommend against using an ERV as primary ventilation for bathrooms & laundry since the enthalpy core acts to minimize moisture transfer from "high to low" (referring to partial vapor pressure of outdoor and indoor air).…"
Looking for ERV recommendations for a new two level ICF residence located at 6800 ft elevation with 6001 HDD base 65 and 0 CDD base 50. Radiant floor heating only. Conditioned living space is 20,000 cf per level plus small amount of conditioned attic due to foaming the roof deck. Lower level is walkout on one side and buried on three. Upper level has garage attached on one side only.Using total volume * 0.35 ach / 60 min/hour = ~120 cfm flow per level. There are two baths and laundry per level…See More
Welcome to Home Energy Pros Forum. Feel free to join the conversation in the Forum and Groups. And share your energy efficiency photos, videos and upcoming events. If you're blogging about home performance, this is the place for you!