05:11AM | 03/27/02
Member Since: 03/21/02
20 lifetime posts
I am the proud (?) owner of two Consolidated Industries furnaces, which were not a subject of the safety recall, but are known to have a lot of problems with heat exchanger cracking. (For those of you who don't know, Consolidated produced a lot of furnaces under several names before they went bankrupt). Since the water-pressure test for the heat exchangers is about $150 (per furnace) and the CO sniffer test is not 100% accurate, I was thinking about replacement of both units. Plus, my existing furnace is about 70% eficient.

I am a very handy guy and have done most everything there is to do in building a house, but I have never replaced or installed a furnace. How tough is this? It's a gas, heat-only system.

How do you get the things in the attic/crawl space?

I live in San Diego, and thus, although the house is large and poorly insulated, the 75,000 BTu units never run more than about 10 minutes at a time, even on the coldest days. I am assuming that this means they are sized about right.

The existing furnaces are set on a 4 x 4 (the crawlspace) and OSB board (the attic). Wouldn't it be a good idea to set the one in the attic on cement board?

Will I save money doing the install myself? I know I will need a building permit. I promise to check the gas connections with soapy water and hook up the vent properly.



09:30AM | 03/27/02
Member Since: 03/21/02
20 lifetime posts
Good advice, HK, thank you very much! It may well be that my recollection is inaccurate...but the yearly low here is probably 25 degrees, and that at night, so we do not have a real severe heating load. So even for my 3300 square foot house, which is moderately leaky and has single-pane windows, I think that the two 75,000 BTu units are probably on the large side.

The original builder did not put in any furnace return air filters or dampers, and put return air grills on some of the heat registers (no control over air flow), so I guess he probably didn't do any heat loss calculations, either.



Post a reply as Anonymous

Photo must be in JPG, GIF or PNG format and less than 5MB.


type the code from the image


Post_new_button or Login_button

All bookworms need a good bookmark that inspires them to keep reading. To make this colorful bookmark, cut a rectangular p... It turns out that many bath and kitchen cleansers contain chemicals that are dangerous to the skin and eyes, and often pro... So often we paint tiny nooks white to make them appear larger, but opting for a dark, dramatic wall color like this one—Be... Chocolate-colored walls and large window frames allow the exposed wood beams to take center stage in this small screened p... If you're not crazy about the idea of commingling plants and pool, this modern variation may be more to your liking. The s... Yes, a freestanding garage can become its own tiny house. Artist Michelle de la Vega has all the comforts of a modern resi... There’s nothing like a new set of cabinet hardware to refresh a room. The possibilities are endless: Go modern, rustic, or... Pursue what's known as the stack effect. To achieve it, open the windows on both the upper and lower floors, and as warm a... Like no other floor type, a checkerboard design works wonders to underscore the retro kitchen theme. Vinyl flooring, ceram... Twine lanterns add pops of crafty—but sophisticated—flair to any outdoor setting. Wrap glue-soaked twine around a balloon ... When securely fastened to a tree or the ceiling of a porch, a pallet and some cushioning make the ideal place to lounge. V... Incorporate nature into your lighting scheme by securing a dead tree in a concrete mold and draping your pendant lamp from... For the cost of a can of exterior paint , you can totally transform your porch. Paint the floor a hue that complements yo... In this urban apartment, a standard-issue patio became a serene and green perch by replacing the typical concrete with gro... If you put the washing machine in the mudroom, you can stop the kids from walking through the house in dirty, grass-staine...
Newsletter_icon Google_plus Facebook Twitter Pinterest Youtube Rss_icon