3 votes

Is it more energy efficient to ventilate a home with an HRV/ERV or “shock-ventilation”?

The aim of intense ventilation ("stoßlüften") is to exchange air in a room efficiently. Generating a substantial draft ensures, ideally, that all corners of the room are ventilated. If you ...
  • 981
3 votes

What is an energy efficient way to get fresh air indoors during winter?

Simple Answer There is a simple answer that does not require significant modification to an existing residential or commercial building. This is the standard high efficiency HVAC answer to the ...
3 votes

How can I vent smoke from a non-rangehood stove without losing too much hot air?

Not all "range fans" blow the air out of the house. We discovered after decades that ours does not. It has filters and the air just comes out of the sides and right back into the kitchen. You might ...
  • 1,837
2 votes

MVHR no longer the ventilation of choice in some Nordic countries?

I would answer this as a comment, but comments don't accept multiple paragraphs. On the face of it this is a bad idea. Better to pull air OUT of the house, and let it sneak in where it can. ...
2 votes
Accepted

Heat Recovery Ventilator HRV, metal vs paper core?

One expert colleague of mine had heard of this in the past. Once. So it's not unknown. Another thought that it might not be that uncommon, but that it wouldn't be wise to buy one that hadn't passed a ...
  • 14.6k
1 vote

Is it more energy efficient to ventilate a home with an HRV/ERV or “shock-ventilation”?

The big questions of ventilation are: How much air is exchanged How much heat (or coldness) is recovered from the exhaust air A perfect ventilation system for homes would have at least 0.5 air ...
  • 3,494
1 vote

Mechanical damper built in to vent fan?

My high efficiency water heater has an electric damper. Conventional butterfly plate. The unit had a separate data sheet, so it wasn't part of the furnace itself. Try HVAC stores. Explain the ...
1 vote

What is an energy efficient way to get fresh air indoors during winter?

There is a HRV without ducts, which can be installed relatively easy in houses without HRV. The first OEM name is "inventer", but there are cheaper alternatives. It works like this: There are two ...

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