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- Balanced Ventilation with HRVs and ERVs - GreenBuildingAdvisor
The core of an energy-recovery ventilator allows the transfer of both heat and moisture between exhaust and supply air streams Along with heat-recovery ventilators, these appliances provide balanced ventilation systems and reduce the energy costs of providing fresh indoor air Photo courtesy RenewAire
- Six Steps to Success With Heat-Recovery Ventilation
Heat-recovery ventilators (HRVs) and energy-recovery ventilators (ERVs) remove stale air from the home and replace it (in winter) with preheated fresh air from outside The result is better indoor air quality and lower energy use than in standard homes The HRV itself is fairly simple: an airtight box with a heat exchange core that transfers heat from the indoor air to outside air (or vice
- Our Top-Efficiency Heat-Recovery Ventilator
In a heat recovery ventilator (HRV), the two fans are in the same box, and they force air through a heat-exchanger core made of a corrugated plastic or aluminum There are several types of heat exchanger cores in HRVs, and these affect efficiency and cost HRVs can have cross-flow heat exchangers or counter-flow heat exchangers
- How to Size an ERV or HRV - GreenBuildingAdvisor
Let’s say you’re faced with the decision of sizing an energy recovery ventilator (ERV) or heat recovery ventilator (HRV) You’ve already decided you’re going with a balanced ventilation system with either heat and moisture recovery (ERV) or just heat recovery (HRV)
- Integrating an ERV or HRV into a Forced-Air System
Our goal is to apply the analytical tools of economics and finance to uncover practical design solutions for homes We recently took this approach to a study of balanced ventilation, specifically the use of an energy recovery ventilator (ERV) or heat recovery ventilator (HRV) to provide fresh air
- You Probably Need an ERV, Not an HRV - GreenBuildingAdvisor
One of the most frequently asked questions regarding the type of balanced ventilation devices known as the energy recovery ventilator (ERV) and the heat recovery ventilator (HRV) is: “Can I get that in red?” OK, not really Everyone knows that most people prefer their ventilation systems in blue The real question that gets asked a lot, however, is whether to get an ERV or an HRV As you
- Sizing a Heat-Recovery Ventilator (HRV) - GreenBuildingAdvisor
> My new house with in-floor radiant and basement is approximately 28,000 cubic feet I calculated a 200 cfm HRV unit: cubic ft of house = 28,000 28,000 x 85 (to account for interior walls and furniture) = 23,800 23,800 x 5 (air change rate) = 11,900 11,900 60 (to convert air changes per hour to cfm) = 198 33 > My HVAC guy recommends a 300 cfm unit and is not concerned with oversizing the
- HRVs and ERVs - GreenBuildingAdvisor
This is a collection of the most important GBA articles on heat-recovery ventilators (HRVs) and energy-recovery ventilators (ERVs) — two types of balanced ventilation systems that transfer heat (but not air) from the supply air stream to the exhaust air stream, or vice versa
- Ventilation for a Very Small Home - GreenBuildingAdvisor
That’s why designers typically include some kind of mechanical ventilation, often in the form of a heat-recovery or energy-recovery ventilator (HRVs and ERVs) But as LH has discovered, providing fresh air for a very small house can be a little more complicated, particularly when factoring in a clothes dryer that vents to the outdoors
- Ducting HRVs and ERVs - GreenBuildingAdvisor
Here at GBA, we have consistently advised readers who plan to install a heat-recovery ventilator (HRV) or an energy-recovery ventilator (ERV) to install dedicated ventilation ductwork rather than trying to distribute ventilation air through their heating and cooling ducts
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