There’s an R22 substitute for some units? I’d love to learn more about determining whether or not my 21 year old unit is compatible.
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“Happy Wife - Happy Life” as they say.
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Western Washington: don’t need it. But I’m also in a downstairs unit built into the side of a hill, so I sort of live in a cave?
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I sent my HVAC guy a text but no reply yet. I Googled “HVAC alternative to R22” and got alot of links and the AI overview said there are like eight alternatives, but it sounded like the best for a retrofit solution is
"R-438A (Freon MO99):
This refrigerant is specifically designed as a retrofit solution for R-22 systems and is compatible with existing mineral and synthetic oils. It offers similar capacity and energy efficiency to R-22, making it a popular choice."
It also says that compatibility assessment and installation should be done by a qualified HVAC technician.
And "Cost:
The cost of retrofitting an R-22 system with an alternative refrigerant can vary depending on the chosen refrigerant, the complexity of the system, and the cost of labor. It’s essential to get a quote from an HVAC professional before making a decision."
If I get a reply to my text, I’ll it pass along. 
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Thank you for your detailed reply.
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Got a reply from my HVAC guy to my text. He said either R-438A (Freon MO99) or R-407c will work for me, with no modification to my unit. But YMMV, so you should check with a qualified AC technician about your unit. Sounds like your last AC guy was honest. In the past, I’ve checked Google ratings when getting estimates/hired-help, since there are so many Android phone users out there.
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We have central air but it’s been broken about 5 years I think, too much $$ to fix needs replacement 
I depend on window units to keep out the humidity but I’m sad it isn’t actually cooler. Hope our new place works better 
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We have a couple portable AC units for the bedrooms and a window unit for my backyard office. We used to be able to get by with just a couple fans but summers have been getting hotter and hotter in the PNW.
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No air conditioning I just hide in the dark of my house sitting in my own puddle of sweat and hope I don’t become a statistic
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Ohh yeah!
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The indoor temperature is 98.8 °F; the seals on my rubbing alcohol bottles popped.
Still don’t have AC.
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No! I rent a house and it’s so old, I just got my GRAVITY FURNACE upgraded this December.
You wouldn’t believe what I do in the summer to keep the sun from beating
through the 9 windows on the main floor plus 2 doors, landlord refuses to put screen doors on.
Basement has a side exit door, thank God theres 5 glass blocked windows
2nd Floor 7 windows.
I have ZERO shade from trees, or houses.
Houses are oddly placed and sporadic.
It’s probably close to 100 years old.
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I must have missed this survey 19 days ago. Yes. We just had a mini split installed with three heads. So happy with it.
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Central A/C is not common in New England. I have 2 heat pumps and some window units.
One of the benefits of working at a nursing home- it’s always cool at the Old Folks Home.
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After the poll I remembered something..
I have been using 20 stage water filter applied before shower head since 9/2020. Still Do..
Bought this as an additional situation and installed 5/11/25
I am so grossed out about this old ASS House I rent
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