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Frugal and Energy Efficient Living

bloomington-lib

(946 posts)

1. I've built two of these. Neither one worked out quite right.

Reply to applegrove (Original post)

Sun Feb 9, 2014, 09:32 AM

Feb 2014

The temps were hot, 175 in the winter, and 215 in the summer, but I could never get the airflow strong enough to make a difference. I tried larger intake and exhaust plus added various vent fans, but it wouldn't raise the temp of the room. I think it would make a good water heater or food dehydrator but that's about it unless you're heating a very small room (which on a sunny day, opening your curtains would be easier)

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"Fredericton man builds $300 solar furnace, decreases heating bill" [View all] applegrove Feb 2014 OP

I've built two of these. Neither one worked out quite right. bloomington-lib Feb 2014 #1

Interesting... sendero Feb 2014 #3

It was 4" with a fan inside designed to boost heat through heating ducts. bloomington-lib Feb 2014 #4

I use an integrated multi-source FLson Nov 2015 #14

One generally tries to move 100 cfm per 6" heat run Kaleva Apr 2014 #7

Seems like it would be easy to adapt this noamnety Feb 2014 #2

Here's another article about them. This one is slightly different than the one I made bloomington-lib Mar 2014 #5

Interesting. I was driving in rural ontario and quebec and saw solar applegrove Mar 2014 #6

I remember seeing an article about a similar system in gejohnston May 2014 #8

Solar hot water Woodwizard Mar 2015 #9

Do you have any issues with Freezing in the winter? mackdaddy Mar 2015 #11

freezing Woodwizard Apr 2015 #12

Here are some excellent resources for do it yourself Solar air heating. mackdaddy Mar 2015 #10

A number of videos on youtube brag about the temp rise from their design but... Kaleva May 2015 #13