Air / Discussions

Is solar air heating for a floor as efficient as solar hydronic?

...air heating tubes? Moving into a solar solution though and choosing between a solar water heater and a solar air heater, there you would for sure have more variables in terms of the initial cost of the system, return on investment time, maintenance and lifespan.  I assume you saw our page on solar air heated radiant sl...

Posted by Ryan Johnson Dec. 7, 2020 Delivery: radiant, forced-air and decentralized 2 responses

Can you use a Lunos E2 HRV System to circulate air between two floors?

...airs to circulate air between my basement and main floor. Have a long 1100 sq ft house from the 60s (you know the one). Hoping for something cheaper than a full HRV/ERV system or reducting the basement. Using a Lunos ductless air exchanger  (or ProductAir ductless ERVs) to circulate air between 2 floors in a home would...

Posted by Richard Kolla May 20, 2020 HRV and ERV 1 response

Is it ok to add insulation between joists in a crawl space?

Hi, I recently purchased a newly-built ground floor condominium with an accessible crawlspace.  This is in Colorado, dry climate, cold winters.  The walls of the crawlspace are insulated and the dirt floor is sealed with a vapor barrior, but my indoor floors felt cold this last winter, making my whole living space cold...

Posted by Cheryl Bottomley May 11, 2020 Crawl spaces

Does paint work instead of a poly vapour barrier?

...air barrier? More often than not over the last many decades the 6-mil poly is meant to be the air barrier as well, which is very different, read more here – The difference between air barriers and vapor barriers and how to apply them As for a way to explain it, a vapour barrier is in effect ‘water proofing’ walls, or a...

Posted by Bill Fletcher May 6, 2020 Air and vapour barriers 1 response

Can you provide Crawlspace Insulation Design Assistance?

...air. Humid air not feels cooler, but heating humid air requires more energy than heating dry air. So that 6-mil poly membrane is essential above all else for comfort, durability, energy efficiency, and air quality.  You mention putting the poly membrane on the floor, any reason you can’t take that up the walls? Doing s...

Posted by Randy Christensen Dec. 10, 2019 Crawl spaces 1 response