Efficient home ventilation / Discussions

How do you determine the correct sizing of an HRV?

...Home Ventilating Institute a home should provide 0.35 ACH which is approximately 50CFM per 1000 sq ft (this recommendation is based on ASHRAE 62.2) but it doesnt say if this is additional ventilation to natural ventilation or not. is 0.35 ACH independent of the current air tightness of a home or is it assuming a home o...

Posted by Matt Russell April 14, 2025 HRV and ERV 1 response

Which is the best ERV for cold climates?

...home Green Building Product Directory and search by location, but most of the major brands of home ventilation equipment would likely be available either in a local building supply store, and if not online I would imagine.  Perhaps you saw this page already, but here is a guide to choosing between HRVs and ERVs 

Posted by Khoa Anh Nguyen Aug. 1, 2023 HRV and ERV 1 response

What is the best ductless HRV system?

...ventilation systems DIY install video Are you building a new home or addition, or is this an project to retrofit an existing space that doesn’t currently have ventilation? We used it for a new home, and as you will read in that page it has some advantages and some disadvantages, namely not being able to use a central s...

Posted by michelle ifversen Dec. 17, 2021 HRV and ERV 1 response

Should I install an HRV or ERV?

...ventilation using a HRV or ERV? Thank you in advance, David. Choosing which is better between an HRV and an ERV depends on the climate. HRVs (heat recovery ventilation) recover heat from exhaust air, and ERVs (energy recovery ventilation) recover heat and moisture, but you really can’t go too wrong with either. this pa...

Posted by David Hinton March 4, 2022 HRV and ERV 2 responses