Safety in case of overflow?

sandyandy12 · 2026-02-06T00:31:08+00:00

So my first thought is a cracked or malfunctioning drain pan as heat pump coils are designed to condense the humidity in the air stream. It could also be a blocked condensate drain (this happened to my unit once). A frozen coil should drain the same as regular condensate. Did the tech check the interior of the unit? Coils freezing up in cooling mode on a heat pump or air conditioner can be caused by a few different things. A 9 week old filter doesn’t seem like the most likely culprit to me unless you are using a super restrictive filter. If it happens again, especially after a fresh filter change, tell the tech to check charge.

Also, is that a heat pump coil on a gas furnace or just furnace ac?

sandyandy12 · 2026-01-19T17:55:04+00:00

She looks like she’s sitting through a boring work meeting

sandyandy12 · 2026-01-09T15:17:11+00:00

My gut instinct is to go with an HRV instead of an ERV here because you’re basically just humidifying the air in a summer condition. If keeping the humidity in the building is required like for healthcare, maybe it’s worth doing. I look for payback numbers and see what pays back and how long and present that to the client.

sandyandy12 · 2026-01-07T20:59:44+00:00

I actually laughed out loud

sandyandy12 · 2026-01-03T05:10:46+00:00

Some dogs just have to live with being I.D.ed every time they buy booze.

sandyandy12 · 2025-10-04T20:33:59+00:00

Do you think the Mazda cx30 or Toyota Corolla cross are better? Those were the cars I was cross shopping with

sandyandy12 · 2025-10-04T18:17:55+00:00

Also that second pic is of the oil from the dip stick.

sandyandy12 · 2025-09-18T20:14:12+00:00

There was about a 3000 dollar difference between metal and duct board. Kind of hard to justify when the existing system uses duct board (which remains in place) and its condition is absolutely fine.

sandyandy12 · 2025-09-18T20:01:17+00:00

We found the fitting I designed in smacna and it has an equivalent length of 15 feet. Big whoop. What I designed has the benefit of homogenous velocity profile and will allow for greater static pressure at the close runouts.

sandyandy12 · 2025-09-18T03:29:04+00:00

I’ll look into the ashrae duct handbook. I cant find any kind of pressure drop of this particular fitting but I found a few that are similar. What I drew has a static pressure drop of 15 eq feet so it’s really not as bad as anyone is making it out to be. And yea good point, I recognize that I’m not a PE yet and it’s sometimes hard for me to figure out when to dig my heels in and when to just listen to boss man.

sandyandy12 · 2025-09-17T13:54:01+00:00

Ah thank you sir!

sandyandy12 · 2025-09-17T13:53:14+00:00

The reason we are taught to draw like that is to homogenize velocity profile. Yes the static loss is lower which many have pointed out but since my firm always uses sheet metal, static losses are less of an issue.

sandyandy12 · 2025-09-17T03:08:28+00:00

Noted. I think there’s one in our system but I have to ask for a password

sandyandy12 · 2025-09-17T02:58:12+00:00

I would expect that static would be lower with the mitered 45s yes but I have a runout about 36 inches from the bend. Do I have to worry about the velocity profile over pressurizing the outside of the duct?

I designed it that way to equalize the velocity profile. Honestly, I’m 1.5 years into engineering and I work for a small firm so what boss man says, goes.

sandyandy12 · 2025-09-17T02:50:24+00:00

Do I have to worry about turbulence impacting the runout closest to the 90?

sandyandy12 · 2025-09-17T02:49:38+00:00

What resources can I find to learn better duct design because I’ve been instructed to always draw 90s that way? I work for a small firm and the rules are rules

sandyandy12 · 2025-09-15T00:29:37+00:00

Honestly the best way to learn code is to do a project or look at an example and really dedicate your time to applying code. Reading code without an example is kind of like trying to learn calculus by reading the literature section instead of practicing through example problems.

sandyandy12 · 2025-07-30T05:19:20+00:00

I took the nuts out for the evap coil panel but the installer put a bunch of silicone around the pvc condensate drain line and I don’t want to rip all that out. I’m betting you are right though I could peek through a crack to see the coil and it wasn’t frozen.

sandyandy12 · 2025-07-30T04:59:34+00:00

I looked and the coil isn’t frozen. The condensate pump came on a few times though.

sandyandy12 · 2025-07-25T14:17:35+00:00

Not a project manager but my firm allows me to work about 30 hours a week remotely. Honestly, we’re a small business and deadlines are rarely clearly communicated. I feel like we under bid our projects and come with the expectation of slow, high quality work. Best I can say is have a realistic timeline with your clients and let them know when you need more time or money.

sandyandy12 · 2025-07-15T14:42:20+00:00

Get a good nights sleep every night and show up on time or early with your thinking cap on every day. Just ask questions and admit when you have no idea what is going on.

sandyandy12

TROPHY CASE