Search: Posts Made By: PoorJohn
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06-20-10, 12:20 PM
Replies: 2
Views: 1,378
Posted By PoorJohn

I wish! The squirrel cage is well centered,...

I wish!

The squirrel cage is well centered, decent clearance to the housing at both ends. I can make it spin quietly by applying moderate pressure e.g. by tightening the bolt holding the rotor...
06-20-10, 03:31 AM
Replies: 2
Views: 1,378
Posted By PoorJohn

(brand new)Rheem RGPR-10N-BRM blower unbalanced

A local authorized dealer just installed a Rheem two-stage condensing unit and a VS/ECM furnace. About the time their trucks were a mile from here (actually, an hour or two after they left) the...
08-02-09, 01:12 AM
Replies: 6
Views: 961
Posted By PoorJohn

What did LearnTorah say to justify that trip to...

What did LearnTorah say to justify that trip to the woodshed?

Assuming s/he actually installed a split system (mini?) in a rented second-floor apartment, 'installed' just as likely meant buying...
07-18-09, 10:32 AM
Replies: 11
Views: 20,869
Posted By PoorJohn

I thought it was required that combustion air and...

I thought it was required that combustion air and return air had to be sealed from one another. Not saying that's true in old houses, but would be something up there on the to-do list when puttering...
07-17-09, 11:56 PM
Replies: 11
Views: 20,869
Posted By PoorJohn

Certainly. But the furnace closet (assuming such...

Certainly. But the furnace closet (assuming such an installation) can be quite well sealed from the living space, so that won't be a path for conditioned air to be "sucked out" by the attic fan.
07-17-09, 11:52 PM
Replies: 4
Views: 2,749
Posted By PoorJohn

The answer is to learn enough to *almost* be...

The answer is to learn enough to *almost* be capable of doing it yourself.

By then you will have done your energy calculations, understood your building inspector's requirements, learned about...
07-17-09, 02:55 AM
Replies: 11
Views: 20,869
Posted By PoorJohn

The rocket scientists are elsewhere, building...

The rocket scientists are elsewhere, building rockets. If your attic temperature goes to 120F on a hot afternoon, your ceilings will get proportionally warmer and deliver more heat load to your...
07-05-09, 02:16 PM
Replies: 8
Views: 1,696
Posted By PoorJohn

Not expensive enough for govt work! You're right...

Not expensive enough for govt work! You're right about current offerings - in the last month four were sold (Advanced search/completed listings) for $59.98 to $66, plus $14.95 for the meter unit. So...
07-05-09, 12:07 AM
Replies: 8
Views: 1,696
Posted By PoorJohn

There's a company that sells a line of...

There's a company that sells a line of instruments called Fieldpiece that includes an anemometer (and thermometer) cheap enough for DIY - $75 or less for a new one on fleabay.
07-02-09, 11:53 PM
Replies: 7
Views: 1,968
Posted By PoorJohn

Where the heck do you get unfaced fiberglas? I'd...

Where the heck do you get unfaced fiberglas? I'd like to add some insulation and the only stuff I can conveniently find around here (left coast) is faced.
06-28-09, 07:30 PM
Replies: 4
Views: 1,117
Posted By PoorJohn

JWBLue said: I will be replacing an exiting...

JWBLue said:

I will be replacing an exiting central unit.

Do I need to hire a HVAC contractor to tell me what size I need?
>>No, but if you get the right contractor you might end up with a...
06-28-09, 07:07 PM
Replies: 4
Views: 1,579
Posted By PoorJohn

you may have eliminated everything else in your...

you may have eliminated everything else in your mind, but I didn't see enough information in your post to agree or disagree with your conclusion.

If your system has a normal gravity-flow system...
06-25-09, 12:13 AM
Replies: 16
Views: 21,563
Posted By PoorJohn

Sounds like something worth owning, makes more...

Sounds like something worth owning, makes more sense to me than a slight delta-t. Other opinions?
06-21-09, 11:28 AM
Replies: 6
Views: 1,563
Posted By PoorJohn

I'll leave that riddle to the experts. I'll PM...

I'll leave that riddle to the experts. I'll PM you the link to the s/w, although it doesn't even include shading directly, nor do anything to size heating requirements, only cooling.
06-21-09, 11:17 AM
Replies: 6
Views: 1,563
Posted By PoorJohn

I have no quarrel with your argument about...

I have no quarrel with your argument about humidity, except now that we have two-stage condensers (which I guess I'd be foolish not to buy) doesn't that kind of take care of the short-run...
06-21-09, 10:59 AM
Replies: 5
Views: 815
Posted By PoorJohn

[QUOTE=srercrcr;1583687]Man I haven't had an 8...

[QUOTE=srercrcr;1583687]Man I haven't had an 8 since the 80s. If you go to a 16, your light bill will drop in half!!.../QUOTE]Only in my dreams. The house is pretty well insulated and we do use...
06-21-09, 10:55 AM
Replies: 5
Views: 815
Posted By PoorJohn

Thanks for that link. At first glance the blank...

Thanks for that link. At first glance the blank side which I'd expect to put against the house says 'allow 24" clearance' which would defeat my purpose, but then I noticed that Rheem specifies only...
06-21-09, 02:23 AM
Replies: 5
Views: 815
Posted By PoorJohn

Recommended 3-sided condensing units?

I'm replacing an existing a/c from the good old 8 SEER days that had the condenser just a few inches from the house, and was surprised to learn that 18-24 inch clearance is required/recommended for...
06-21-09, 02:16 AM
Replies: 6
Views: 1,563
Posted By PoorJohn

Given peak heat load, what size a/c?

I'm replacing an existing a/c and heeded the general advice to do a heat load calculation. The software I used gives hour-by-hour loads and shows all the components so it's easy to see, for instance,...
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