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Search: Posts Made By: jeff5may
Forum: Geothermal & Heat Pumps 10-07-19, 11:53 AM
Replies: 1
Views: 109
Posted By jeff5may
Not the same at all. High molecular weight, high...

Not the same at all. High molecular weight, high pressure. R410a is kind of a "high pressure extension" of R134a. Where R134a is good for Sub-Zero evaporator temperature and/or super high condensing...
Forum: Conservation 09-22-19, 12:14 PM
Replies: 77
Views: 5,911
Posted By jeff5may
Just had another communication meeting with the...

Just had another communication meeting with the product development guys at Ford. They're really going to bring it, starting next year. The team is in the " anticipation building" phase now: not...
Forum: Geothermal & Heat Pumps 09-17-19, 12:16 AM
Replies: 4
Views: 270
Posted By jeff5may
All commercial grade pumps are rated for duty,...

All commercial grade pumps are rated for duty, power, rpm, load, and temperature range. Duty is the S rating. Check out this page:

https://www.engineeringtoolbox.com/amp/iec-duty-cucles-d_739.html
Forum: Geothermal & Heat Pumps 09-14-19, 10:24 PM
Replies: 4
Views: 270
Posted By jeff5may
This question is very open ended, and brings up...

This question is very open ended, and brings up more questions about your particular rig to be answered properly. The main questions hover around the amount of heat you plan on moving versus the...
Forum: Appliances & Gadgets 09-14-19, 10:54 AM
Replies: 11
Views: 575
Posted By jeff5may
That 697 was most likely the final clearance...

That 697 was most likely the final clearance price to get rid of the purple and pink units. I see the new model on the floor once in a while, priced about double that.
Forum: Appliances & Gadgets 09-12-19, 04:31 AM
Replies: 11
Views: 575
Posted By jeff5may
I bought the unit on FB marketplace from the...

I bought the unit on FB marketplace from the original owner, who considered it broken, for under 100 bucks. It had been used daily for a family of five and never been opened. It had close to the same...
Forum: Appliances & Gadgets 09-08-19, 11:26 PM
Replies: 11
Views: 575
Posted By jeff5may
I had the next generation of Whirlpool duet...

I had the next generation of Whirlpool duet hybridcare dryer from the OP. They really are worth it. Drying time depends on the load and mode. As well as the normal dryer settings, the one I had had...
Forum: Geothermal & Heat Pumps 09-03-19, 08:07 PM
Replies: 24
Views: 4,374
Posted By jeff5may
What he said... A lot of the variable...

What he said...

A lot of the variable capacity mini-split systems have brushless DC motors inside the pot. Most have 3 phase stators and a permanent magnet rotor. The control systems are all...
Forum: Geothermal & Heat Pumps 08-29-19, 08:11 PM
Replies: 20
Views: 742
Posted By jeff5may
For straight suspended pipes in the cavity, a...

For straight suspended pipes in the cavity, a boiler is the way to go. Without the heat spreaders, the pipe is the only radiating surface. The water temperature has to be very high, so it can induce...
Forum: Geothermal & Heat Pumps 08-28-19, 10:18 AM
Replies: 20
Views: 742
Posted By jeff5may
There are many different kinds of hydronic...

There are many different kinds of hydronic heating loops. Generally, the more efficient and dense the radiator, the lower the entering water temperature. For example, a thick, insulated concrete slab...
Forum: Geothermal & Heat Pumps 08-27-19, 02:11 AM
Replies: 20
Views: 742
Posted By jeff5may
Looks like it should be a good match for your...

Looks like it should be a good match for your purpose. The only thing I would be wary of is the 15 amp current carrying capacity for the compressor. A 4 ton unit might draw more than that when it's...
Forum: Geothermal & Heat Pumps 08-26-19, 05:55 PM
Replies: 20
Views: 742
Posted By jeff5may
The heat exchanger doesn't really care much about...

The heat exchanger doesn't really care much about the temperature. The control is another story. Since the original purpose is to heat a massive pool, the flow meter and the thermometer sensors are...
Forum: Geothermal & Heat Pumps 08-26-19, 03:47 PM
Replies: 20
Views: 742
Posted By jeff5may
Ok so it's the blue heat exchanger that's...

Ok so it's the blue heat exchanger that's leaking? The unit looks like a modified minisplit outdoor unit. Highly hackable. The unit already has access valves, and from what I can tell, the...
Forum: Geothermal & Heat Pumps 08-24-19, 12:51 AM
Replies: 20
Views: 742
Posted By jeff5may
What kind of heat exchanger do you imagine to...

What kind of heat exchanger do you imagine to replace the broken one with? It's contained inside the unit? If the unit has an electronic control and you fiddle with the guts, it will rebel, and...
Forum: Other Improvements 08-21-19, 03:29 AM
Replies: 5
Views: 249
Posted By jeff5may
Ok so if you are going with a dedicated electric...

Ok so if you are going with a dedicated electric pump, use a battery backup DC pump. Why? It's a dedicated system. Low chance of failure, occasional use assures a long life. Also, a DC pump wired to...
Forum: Conservation 08-15-19, 10:22 AM
Replies: 77
Views: 5,911
Posted By jeff5may
How about that? Ford is very near the release...

How about that? Ford is very near the release version of the battery electric truck. We just had a meeting this week where our tech liaison showed up and started off with this video:
...
Forum: Renovations & New Construction 08-12-19, 10:26 PM
Replies: 59
Views: 8,340
Posted By jeff5may
I second that opinion. The main filter in a...

I second that opinion. The main filter in a central HVAC system is not meant to be a HEPA filter. They're there to keep the bugs and lint off of the heat exchangers and to cause as little pressure...
Forum: Conservation 08-12-19, 10:06 PM
Replies: 77
Views: 5,911
Posted By jeff5may
Well guys, I hate to kill your skepticism, but...

Well guys, I hate to kill your skepticism, but Ford, rivian, and Tesla are going to be having a 3 way tug of war on battery electric trucks. The corporation I work for just got budget approval for a...
Forum: The Billiards Room 06-28-19, 07:50 AM
Replies: 7
Views: 689
Posted By jeff5may
Well, you know, I have a lot of hobbies. I found...

Well, you know, I have a lot of hobbies. I found one that pays for all of the others. That would be appliance repair.

Due to the shakedown in the industry, and the disposable attitude of users,...
Forum: Lighting 06-26-19, 09:32 PM
Replies: 5
Views: 508
Posted By jeff5may
I bought a few of the self contained stick lights...

I bought a few of the self contained stick lights over the winter for the garage. I was considering going with retrofit tubes, as everyone and their brother has the old fixtures up for grabs on...
Forum: Appliances & Gadgets 06-13-19, 11:57 AM
Replies: 23
Views: 904
Posted By jeff5may
Well now... Main question is how much water...

Well now... Main question is how much water heater do you want? If you eventually buy another water heater, get one that has a warranty that will outlive you. Sounds like you originally found a...
Forum: Appliances & Gadgets 05-27-19, 10:59 PM
Replies: 23
Views: 904
Posted By jeff5may
On those impossible threaded fittings, I use both...

On those impossible threaded fittings, I use both Teflon tape and pipe dope. Chase the threads to make sure they are clean and the right shape slash taper. Wrap the male fitting clockwise and then...
Forum: Geothermal & Heat Pumps 05-19-19, 12:41 AM
Replies: 9
Views: 607
Posted By jeff5may
That's a 2 ton 10 seer unit. Not super efficient...

That's a 2 ton 10 seer unit. Not super efficient by today's standards. Not much better than a window AC unit. But, I'm assuming it was donated or a super bargain. I myself would add a reversing...
Forum: Solar Heating 04-09-19, 10:32 PM
Replies: 213
Views: 92,790
Posted By jeff5may
Your thermostat looks like the type I had in the...

Your thermostat looks like the type I had in the greenhouse in the past. They're super reliable, but not so precise. Mine used to drift around 5 degrees total, depending on it's mood. It outlasted...
Forum: Solar Heating 04-08-19, 06:55 PM
Replies: 4
Views: 1,160
Posted By jeff5may
Option 3. If you have the right conditions you...

Option 3. If you have the right conditions you could set up a thermosiphon. This would yield the most heat per sun. If everything is not perfect, you'll have to run a pump and a control of some kind....
Showing results 1 to 25 of 500

 
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