I hear you about the old plaster—some of those walls are basically historic artifacts at this point. But I’ll throw out a different angle: have you looked into high-efficiency window units or even portable ACs? I know, they get a bad rap for being clunky or ugly, but there are some newer models that are surprisingly sleek and energy-efficient. I helped a friend retrofit a 1920s bungalow last summer, and instead of drilling into the original walls, we went with a combo of window units and ceiling fans. It wasn’t as seamless as a mini-split, but it meant zero holes in the plaster and way less hassle with permits or hiding lines.
If you’re worried about aesthetics, there are some clever ways to disguise window units—like custom wood surrounds or painting the exterior bracket to match the trim. For portables, tucking them behind furniture or using decorative screens can help. Plus, you can move them around as needed, which is handy if you only need to cool certain rooms at certain times.
On the landscaping front, I totally get wanting to hide the outdoor unit, but sometimes less is more. Overcrowding it with plants can actually mess with airflow and efficiency. I’ve seen folks use lattice panels or even repurposed shutters to create a little “screen” that blends in with the garden without suffocating the condenser.
Not saying mini-splits aren’t awesome—they’re super efficient and flexible. But for folks who are really nervous about altering original features, there are some decent alternatives that might be worth a look. Sometimes the low-tech route ends up being the most respectful to the old bones of the house... and your nerves.
Couldn’t agree more about not wanting to mess with old plaster. Once you start drilling, you never know what you’re getting into—cracks, crumbling, and then you’re patching for days. I’ve seen way too many folks regret cutting into those walls just to run lines for a mini-split.
Window units have come a long way, honestly. I put one of the newer inverter models in my own place last year and it’s quieter than my fridge. Not pretty, but with a little trim and a coat of paint, it blends in fine. The flexibility is huge too—if you need to swap it out or move it, you’re not stuck with a permanent hole.
Portable ACs are hit or miss for me. They’re convenient, but the vent hoses can be a pain to seal up tight, especially in older windows that aren’t square anymore. Still, if you’re just cooling a bedroom at night, it’s hard to beat the convenience.
On hiding the outdoor units, totally agree about airflow. I’ve seen people build these elaborate “cages” with trellises and then wonder why their AC keeps tripping out. You need at least a couple feet of clearance on all sides or you’re just asking for trouble. Lattice panels or even a simple fence section work if you keep them far enough away.
One thing I’d add—if you’re using window units, check your electrical circuits. Old houses sometimes have weird wiring and it’s easy to trip a breaker if you’ve got too much running at once. I had to run a dedicated line for mine after blowing fuses all summer.
Low-tech isn’t always glamorous, but sometimes it’s the only thing that makes sense with these old houses. No shame in keeping things simple if it means preserving the character (and your sanity).
Once you start drilling, you never know what you’re getting into—cracks, crumbling, and then you’re patching for days.
That’s the truth. I once tried to fish a wire through what I thought was a solid plaster wall, only to have half the corner crumble out. Ended up learning how to do a three-coat patch the hard way. I’m curious—has anyone tried those through-the-wall AC sleeves in old houses? I’ve always wondered if they’re any less risky than window units or if it’s just a different flavor of headache.
I once tried to fish a wire through what I thought was a solid plaster wall, only to have half the corner crumble out.
Man, I’ve been there. Old plaster’s got a mind of its own—sometimes it’s rock solid, sometimes it just gives up on you. As for those through-the-wall AC sleeves, I’ve put a few in over the years. Honestly, it’s a bit of a toss-up. You’re still cutting a big hole, so if your walls are already fragile, you might end up with more patching than you bargained for. But at least you don’t have to worry about the window frame sagging or the unit rattling loose every summer.
One thing I will say: if you go that route, take your time with the framing and support around the sleeve. Makes a world of difference. And yeah, it’s a different flavor of headache, but sometimes it’s the lesser evil compared to wrestling with window units or running ductwork where it just doesn’t want to go.
Yeah, patching old plaster is a whole different beast. I’ve had spots just crumble when I barely touched them, then the next section’s like concrete. You’re right about framing—if you rush it, you’ll regret it later. It’s not glamorous work, but it pays off.