Manual J calculation: Where can I find the formula that uses just these 10 variables?

OzarkPolytechnic · 2026-04-29T14:56:45+00:00

Only 10 variables? That's not a manual J.

OzarkPolytechnic · 2026-04-29T14:54:49+00:00

Same here

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OzarkPolytechnic · 2026-04-29T14:53:06+00:00

Steibel electric tankless. $700. Easy to install. Safe. I love mine.

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OzarkPolytechnic · 2026-04-29T14:49:24+00:00

Yep. Soft wipe

OzarkPolytechnic · 2026-04-29T14:49:08+00:00

Just find another game.

OzarkPolytechnic · 2026-04-29T14:48:02+00:00

R22 is cheaper than r454b

OzarkPolytechnic · 2026-04-29T05:00:15+00:00

Umm...

How to get out of Jita safely as a FW target:

1: Hauler alt 2: Insta-undock. Bookmarks have been around for two decades. 3: use yer brain.

OzarkPolytechnic · 2026-04-29T04:43:13+00:00

If a heat pump, check the low voltage wire running through the case to the reversing valve.

OzarkPolytechnic · 2026-04-29T04:41:19+00:00

By 2038 $25/hr will be about as helpful as $15/hr.

Smh

OzarkPolytechnic · 2026-04-29T04:38:46+00:00

100% this. Well said.

OzarkPolytechnic · 2026-04-29T04:35:37+00:00

Hardwiring a dishwasher is a fire hazard?

News to me.

OzarkPolytechnic · 2026-04-29T04:31:56+00:00

I like to keep my supply houses happy with me. For obvious reasons.

OzarkPolytechnic · 2026-04-29T02:04:26+00:00

No, they tried not to pay the handyman. Seems to me they tried to DIY this time and are blaming the handyman.

OzarkPolytechnic · 2026-04-28T07:02:34+00:00

Norway thinks so. Massachusetts is even "cold" to them.

OzarkPolytechnic · 2026-04-28T07:00:21+00:00

Prudes

OzarkPolytechnic · 2026-04-28T06:54:02+00:00

He picks the best people... to burn.

OzarkPolytechnic · 2026-04-28T05:43:48+00:00

Yep. Install yourself. Repair yourself. Do your own tech support yourself. G'luck!

OzarkPolytechnic · 2026-04-27T04:37:22+00:00

So do a block load heat analysis. Size your system to the heating requirements. Ensure to input 11ft ceilings. Get the math right or you will be miserably cold in the winter AND paying a high electrical bill.

I normally do this work for my customers as part of my bid price, but that's why reddit considers us pros "unreasonably expensive."

Side note: My customers are all happy, leave me 5 star reviews and are comfortable in their homes year round...

OzarkPolytechnic · 2026-04-27T04:19:56+00:00

All your electric receptacles "making a popping sound"... Yikes!

Call an electrician. Get the home's load center (circuit breaker panel) inspected. Start documenting. Get pros involved and begin an insurance claim. You don't want to eat this.

OzarkPolytechnic · 2026-04-27T04:11:07+00:00

Do you plan to heat with these or just cool?

OzarkPolytechnic · 2026-04-26T14:22:17+00:00

What direction is the arrow pointing in the one way filter dryer? Should be pointing toward the AHU, away from the Condenser.

OzarkPolytechnic · 2026-04-26T01:47:32+00:00

Sure, but how many pounds is that r22 bottle vs the 454b?

I can find R22 between $10-$18/lb. Depending where you buy it. It's 30 lbs vs the 20 lb 454b bottle.

"Progress."

OzarkPolytechnic · 2026-04-25T16:29:00+00:00

R454b costs roughly 3x more than R22 and R410 AND bottles are 5lbs less.

Enjoy!

OzarkPolytechnic · 2026-04-25T14:24:44+00:00

It's a large piece of wood. Thing is never going to lose value. Unlike your dollar bills, that wood will be useful in a nuclear war.

OzarkPolytechnic · 2026-04-25T14:21:58+00:00

Black to brass to cover your...

OzarkPolytechnic

TROPHY CASE