GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter Instagram YouTube Icon Navigation Search Icon Main Search Icon Video Play Icon Plus Icon Minus Icon Picture icon Hamburger Icon Close Icon Sorted

Community and Q&A

Ventilation in a Temperate Climate

marsaloni | Posted in General Questions on

Good afternoon,

I am building a 1,350sq ft house in a temperate climate in south america which stays roughly 65-75 year round. It doesn’t generally get very humid either. The house is all one level, 2 bedrooms, 1 full bath, office, open kitchen & living space. I’ve been looking at the lunos systems but don’t feel I need the ERV function. I do like the ductless option as the ceiling will be exposed wood, there is no attic space or wall space to runs ducts (concrete). I can run conduit to various locations and have holes put in the walls which will be concrete/brick for any ventilation. My goal is to have a constant stream of fresh air coming into the property and have that air filtered very well as it gets dusty/smokey at times. Power is US standard 120/240v. Looking for recommendations. All the windows will be sealed, non operational so the house will be rather tight. Thank you

GBA Prime

Join the leading community of building science experts

Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports from the field.


  1. Expert Member
    Michael Maines | | #1
  2. Expert Member
    AKOS TOTH | | #2

    Probably the simplest is to use one of the ceiling cassette units. Most have a port for fresh air supply and can drive an external fan. I would have a simple passive intake with a multi-stage filter to the fresh air fan supplying the ceiling unit. Depending on what you want to filter a combination of Merv8 followed by a HEPA filter is a good choice. There are a number of companies that make a filter/fan combination unit (ie. Fantech HS300, Lifebreath TFP3000) that will work for this.

Log in or create an account to post an answer.


Recent Questions and Replies

  • |
  • |
  • |
  • |