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My license? Its on the back man.......

Well, there are other problems. But if you remove arson from the statistics it isn't so bad.

Check this out - https://nebraska.tv/news/local/house-explosion-rocks-wood-river

"Dual Action" - doesn't just go around in a circle, but oscillates sort of like the old Spiro-Graph we had as kids.
Should have a disk mounting thingy attached....

Looks like a DA sander, used in the paint shop.

Hmmm... I wish I had known about the DX design before I installed my geothermal system (Climatemaster).

Oops - I see you were thinking of argon for purge.

But - have you ever TIG welded? There are few places (especially install & repair) where you could actually get a TIG torch all the way around a...

Well, if your plan is to TIG weld so you don't have to carry a tank, where are you going to get the argon for your TIG welder??

Anyone remember the gizmo in the penny arcade at Disney Land where you grabbed two posts & tried to hold on while the voltage ramped up? We paid to do that...

Maybe you should replace all that stuff with one of these.....

Don't forget, when your HRV runs you will be drawing in outside air. The air coming from the vents will be at a temperature somewhere between the temperature outside and inside of your house. And -...

Nice explanation Jeff - thank you!

Hook said tank to your grill & light it once...

Silicon caulk is permeable to moisture, it actually requires moisture to cure. A trapped air pocket can develop liquid moisture under the right conditions.

Keeping moisture away from thermistors is a pain. They are sensitive to moisture and will change value drastically with exposure. Encapsulated in a stainless steel can works, except the goop used to...

Looks like water got in the can, freeze/thaw cycles split it.

Hmmm, why did they bother sealing the edges?

Put an air separator/vent in the line before the pump, and a small expansion tank & access valve for pressurizing the system. You won't be adding enough water to raise the freeze point enough to...

Swagelok makes lots of vacuum rated parts. But they are expensive.

https://products.swagelok.com/en/all-products/valves/bellows-sealed-valves/c/207?clp=true

Those two are lefties.

You have a great way of explaining things - I appreciate that!! (not everyone is blessed with that ability)

608 is the "License to Chill"

(cool James Bond dad sorta joke)

Assuming none are waaay off, label each, put them all into a styrofoam box or picnic cooler and wait an hour so they all are at the same temperature & stabilized in the same environment. Take...

One Youtuber I find spot-on and actually amusing to watch is "This Old Tony". Someone who actually digs into the issue at hand, thinks the problem through, is a decent machinist and has a great sense...

I started typing an answer, then remembered I am an Engineer & would get slammed for replying with a dissertation.

;)

The simple answer is that pound for pound, refrigerants cause much more...

Maybe the question should have been:

"How many of you who actually know how to read gauges and do the calculations, are using digital instead of analog?"

In heat mode my floor gets warm. No air blowing (well, I could run the heatpumps I use for cooling in heat mode, but only did that after install to see if it worked, i.e. backup. warm floors are...

It seems we were not thinking along the same lines.... my brain was stuck in heating mode, in-floor heating, much slower thermal time constant.

HOWEVER, it still sounds like your cycle times are...

I use the closed cell foam insulation for wrapping copper pipe, held in place with either black electrical tape (short term - it gets gooey if left on too long) or tie wraps (longer term install)....

I bought a handful of these and taped the sensor to the pipe I was wanting to measure. Then I covered about a foot of the pipe with insulation, with the sensor in the middle. Much easier than...

Something I didn't think about is the transfer of heat from the water to the house envelope. I don't have any experience with the RHT system nor for tubes not embedded in concrete or gypcrete,...

I was thinking something totally different...

If the flow rate of heat out of the buffer tank (to the zones) is greater than the input (from the heatpump), all of the heatpump's output is going to the zones and the heatpump should stay on...

I have found some of the Asian jumping worms in my yard, they can really wiggle fast! I sent photos to the University for confirmation. Turds will probably overtake our "normal" worms.

Here is a...

Heat sources for homes are ‘supposed’ to be designed to provide the heat required at the lowest outdoor temperature to maintain comfort. But our homes seldom are operating at that point. During a...

Not sure how big (physically) the chamber is, but there may be a panel covering a lot of plumbing all buried in fiberglass insulation. Last one I dealt with I ended up digging all the insulation out...

Home hack laundry chutes. Plugged with dirty underwear...

Are there valves on the loops for each zone that are throttling the flow?

In 20+ years of use, I don't think my w2w heatpump has ever turned on and ran for less than an hour (except when I would...

88°F and 70% rh is a dewpoint of 77°F. Your floor would have to be 78°F or 79°F to keep it dry. That won't keep the home comfortable. And don't forget, the people / pets / cooking / showers will add...

Welcome to the group!

Cooling the floor isn't recommended. Heating the floor is wonderful. My parent's house was built in 1956 and had copper pipes in poured concrete floors, in Nebraska (cold...

Yup - rates right up there with studying bovine flatulance to understand methane sources in the atmosphere.

How about $32?
I haven't tried this one, but RadioShack made some good stuff in the day...
OK - it doesn't have frequency or temperature, but you could keep the more expensive meter in the truck &...

Well crap - just last month I hauled a large box full of the "old style" Christmas lights to the recycle bin at the Fire Station. These were some my parents had when I was a wee lad (1950's). They...

I have two ClimateMaster geothermal heatpumps in my house, installed 12 years ago. Both have desuperheaters for heating domestic water, neither of which have been connected to water (I didn't want...

The low frequency beat near the beginning is something I have heard in heatpumps / compressor systems, usually the rise & fall of a 60Hz sound. However I have never noticed a hum near 240Hz like you...

To determine if oil fog / frezone / etc is contributing to the issue, tape a plastic bag over one of the smoke alarms. Seal it up & see if it gets hot when the heatpump runs.

Nice charts, lucky you have access to calibrated sound equipment, and obviously you know how to use it.

Do you know what is causing the periodic rise & fall of the 50Hz band - i.e. is it related...

The easiest method is to leave the working thermostat in place and have the tenants pay the utilities. It matters not where the thermostat is set if the windows & doors are open.

Yup - just can't get away with being a Mel Brooks, Benny Hill, John Cleese, John Landis or the likes.

For some reason "non vented gas log" made me think of the campfire scene from Blazing Saddles.... thanks for the laugh this morning!!

We had a local Proctologist with a license plate that read "PLANET7".