balanced ventilation

How Balanced Ventilation Systems Become Exhaust-Only

Posted on May 06,2015 by user-756436 in air intake

Unlike the homes of our great-grandparents, the homes of most Americans are served by an array of automatic appliances and systems. When our great-grandparents returned home after a three-day absence, they would need to haul a bucket of water from the spring and light a fire in the kitchen stove before they could brew tea. Today’s homes, of course, have electricity for lighting, a furnace for warmth, an air conditioner for cooling, a water heater for showers, and internet access for Googling.

Does a Home with an HRV Also Need Bath Fans?

Posted on May 06,2015 by user-756436 in balanced ventilation

A balanced ventilation system — for example, a system with a heat-recovery ventilator (HRV) or an energy-recovery ventilator (ERV) — exhausts stale air from some rooms in a building, while simultaneously introducing fresh outdoor air to other rooms. The best balanced ventilation systems use dedicated ventilation ductwork. Usually, these systems pull exhaust air from damp, smelly rooms — bathrooms and laundry rooms — and introduce fresh air to the rooms where people spend most of their time — bedrooms and the living room.

Our Top-Efficiency Heat-Recovery Ventilator

Posted on May 06,2015 by AlexWilson in air-to-air heat exchanger

In last week's blog I reviewed some of the general strategies used for ventilating buildings — or not. This week, I’ll zero in on the types of balanced ventilation in which heat is recovered from the outgoing airstream to preheat the incoming fresh air.

Resistance May NOT Be Futile in the Residential Ventilation Wars

Posted on May 06,2015 by ab3 in 62.2

“ASHRAE 62 is the only national consensus standard document there is. Follow 62.2. Resistance is futile.” So said Dr. Max Sherman last summer in a presentation for the Building America Technical Update meeting. (Download pdf official report here.) That statement about resistance being futile isn’t generally a line you want pinned to you if you’re trying to win hearts and minds, but I asked Sherman about it.

What is the Deal with Ventilation Requirements?

Posted on May 06,2015 by CarlSeville in balanced ventilation

Before I even get started, I want to point out that I am no expert on ventilation. I have learned a lot from (and rely on) many experts, including Paul Raymer, Gord Cooke, John Krigger, Joe Lstiburek, Armin Rudd, and Terry Brennan, among others. I depend on them to fuss about the details of how much ventilation a house needs.

Designing a Good Ventilation System

Posted on May 06,2015 by user-756436 in balanced ventilation

UPDATED on March 13, 2015 Most green builders include some type of mechanical ventilation system in every home they build. That’s good. Since green buildings usually have very low levels of air leakage, mechanical ventilation is usually essential. Unfortunately, several research studies have shown that a high number of mechanical ventilation systems are poorly designed or installed.

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