Shreyas Sudhakar
@shreyassudhakar.com
2.4K followers 1.6K following 1.5K posts
Writing about heat pumps at heatpumped.org Installing heat pumps at vayu.pro Former YC founder and rocket propulsion engineer heatpumped.org/subscribe
Posts Media Videos Starter Packs
Pinned
shreyassudhakar.com
I’m thrilled to announce @vayu.pro, my new heat pump installation company! 🧵
The Vayu team installing a heat pump system in the San Francisco Bay Area, replacing the home's existing gas wall furnace.
shreyassudhakar.com
Will have to check it out. Sounds like the difference between this and a CCA is that this handles the distribution side too?
Reposted by Shreyas Sudhakar
energysmartwv.bsky.social
Great 50 year old #heatpump ad!

Don't heat like a caveman!

This is good mainstream messaging, we need much more like this, not early adopter or green focused.

#energysky #2wayAC 🔌💡
idlerat.bsky.social
general electric ad for a heat pump from 1975 Readers Digest!
Reposted by Shreyas Sudhakar
jacktodd.bsky.social
We had a heat pump installed one year ago in place of an oil burning furnace.
It's quieter and more efficient, keeps temp and humidity more consistent.
Hydro electric bill the same so the savings is entirely in the fuel oil bill - $3500 a year.
Pays for itself in four years.
shreyassudhakar.com
Likewise. I'm down to do another!!
shreyassudhakar.com
We are CA based, but the role can be fully remote! (Preferably in the US, though)
shreyassudhakar.com
I need your help sending another gas furnace to the junkyard - @vayu.pro is looking for a part-time project manager to help us grow!

Zero prior knowledge needed.

If you’re organized, creative, empathetic, and want to break into a climate career, you’ll thrive.

Know anyone who fits the bill?
shreyassudhakar.com
Sounds like a great fit! You should budget somewhere between $5-9k installed (varies a lot based on your location). Should be able to get up to $2k federal tax credit & potentially local rebates. Find a contractor you trust, brand doesn’t matter much as mini splits are fairly commoditized.
shreyassudhakar.com
Ultimately…. I really think working with a quality contractor installing equipment they’re familiar with is going to lead to the best results. So I don’t want to send you down a rabbit hole!
shreyassudhakar.com
Smart thinking :) The challenge is going to be finding a contractor that installs it. Midea relies heavily on their white label partners for distribution so has a really limited footprint under their own brand. You’re in NY right? I did some light googling and this might point you the right dir
shreyassudhakar.com
(the 1401 is that super old school one: shop.rfwel.com/carrier-ksac...)

Unfortunately Carrier/Midea thermostats and Midea branded thermostats aren't always interchangeable. So your best path if you go this route is probably just to go with the Ecobee
Carrier KSACN1401AAA Wired Remote Controller
Shop now for all your quality, Thermostats, HVAC Remote Controllers, Antennas, Power Accessories, Radio Equipment. Free Shipping and Support. Over 15 Years of Experience.
shop.rfwel.com
shreyassudhakar.com
This is getting super nerdy, but pulled from the install manual. Your contractor probably (should) be installing with Scenario 1. That lets the indoor & outdoor units talk, but the thermostat just sends on/off signals.

Scenario 2 would be full communicating, but they reference the 1401 thermostat
shreyassudhakar.com
Midea's rolled out a nice smart communicating thermostat now but I'm not sure if that has made its way to Carrier's offering (not seeing anything similar on their lineup). The old Midea/Carrier thermostats were pretty horrendous. The new ones are a huge improvement.
shreyassudhakar.com
The equipment can be full communicating (indoor unit/outdoor unit/thermostat) all talking to each other, or wired as a traditional 24V using an Ecobee/Nest/etc. Full communicating will give the best efficiency but at least on the last generation, controls for that product line was pretty crummy.
shreyassudhakar.com
The 37MUHA/45MUAA is rebranded Midea equipment! Solid stuff. We install very similar equipment often, it's marketed under a whole slew of different brands. If you go that route, you are probably paying a big premium for Carrier slapping their sticker on, but it should treat you well!
shreyassudhakar.com
In the US, most ACs are 1-Way ACs. They don't have the heating button! Historically, buildings have been heated with natural gas/oil.

So most use two separate devices - one to cool, one to heat. The 1-way ACs are missing the reversing valve allowing them to cool.

Thus the push toward heat pumps!
shreyassudhakar.com
Of course! Happy to help
shreyassudhakar.com
PS: Heat pumps are just ACs that can also do heating. They will work for cooling *exactly* the same as an equivalent AC.

Please don't spread misinfo.

Heat pumps have been used for decades in notoriously hot/humid climates in Asia without issues.

An appropriately sized system will have no issues.
shreyassudhakar.com
Sorry, but that's just plain wrong. Here is the extended cooling performance data for a Gree Livo, a fairly basic heat pump unit. Its nominal capacity is 9,000 BTU/hr, and it maintains that full capacity (9,013 BTU/hr to be exact) at 110 deg F
shreyassudhakar.com
Get one!! bsky.app/profile/shre...

Brand doesn't matter much (www.heatpumped.org/p/web-confus...), find a contractor that does a quality install and prioritize that. A cheap system installed well will outlast an expensive system installed poorly.
shreyassudhakar.com
Window heat pumps are great for housing complexes.

But $40k/unit indicates a problem w/ the bidding process, not heat pump tech.

Onerous compliance requirements, tedious paperwork, prevailing wage mandates on public projects narrow the contractor pool and drive cost. Let’s solve these probs too!
bloomberg.com
The housing agency projects it’ll cost $5,450 to retrofit units with window heat pumps compared with the $40,000 per unit it paid to install centralized systems at some smaller housing complexes.
Boston Public Housing Upgrades Units With Window Heat Pumps
A pilot project aims to cut heating costs and provide air conditioning while reducing emissions.
bloom.bg
shreyassudhakar.com
And I agree that incentives are still very important in making the economics work