I Installed a Della Mini Split Myself — A Working Mom's Honest Review (Plus the 6 Best Della Picks for Your Home)

Let's be real, mama: between work deadlines, school pickup, and the endless snack requests, "research a new HVAC system" lives permanently at the bottom of my to-do list. So for three summers, I did what most of us do — I dragged a window unit into the bedroom, a portable into the living room, and pretended the problem was solved. It wasn't. The kids' rooms were stuffy, the window unit whirred like a jet engine all night, and every July our electric bill looked like a car payment. I wasn't solving the problem — I was renting it.

What kept stopping me was the same thing that stops everyone: the idea that a mini split means a five-thousand-dollar contractor project. Then one Saturday night after the kids were in bed, I fell down an HVAC-forum rabbit hole (glamorous, I know) and kept landing on the same brand: Della, the Texas company that says it's the #1 selling mini-split brand on Amazon. Their flagship Vario 12,000 BTU carried 4.4 stars from more than 1,470 ratings — and the part that sold me was the review gallery, full of regular people, plenty of them moms, documenting their own DIY installs.

So I ordered one. My husband handled the heavy lifting, our daughter "supervised" from the couch with her juice box, and by dinnertime we had heat-pump central hanging on the wall. Here's how it went, plus the six Della mini splits I'd shortlist today and which one fits which house — because if this working mom can do it between Saturday errands, you can too.

The Della Mini Split Line-Up, Compared

#	Product	Best For	My Rating	Price
1	DELLA Vario 12K BTU Mini Split	The one I installed — 23 SEER2, 550 sq ft, 4.4★ from 1,470+ ratings	9.5/10	$779.96
2	DELLA Motto 12K BTU Mini Split	Best value — same coverage, 4.3★ from 840+ ratings	9/10	$749.96
3	DELLA Optima 12K BTU Hyper Heat	Cold climates — heats down to -13°F, runs on 115V	9/10	$853.56, was $969.96
4	DELLA Umbra 12K BTU Mini Split	No electrician — 115V plug-in, Alexa + WiFi	8.5/10	$859.96
5	DELLA Vario 9K BTU Mini Split	Bedrooms & home offices up to 400 sq ft	8.5/10	$749.96
6	DELLA 24K BTU Ultra Hyper Heat	Whole floors up to 1,500 sq ft, heats to -22°F	9/10	$2,249.96

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1. DELLA Vario 12,000 BTU Mini Split — The One on My Wall

The Vario 12K is a 23 SEER2 ductless heat pump — 1-ton, pre-charged, with a 16.6-foot line set and installation kit in the box, and Alexa on the remote side (a lifesaver when your hands are full of toddler). It heats and cools up to 550 square feet, which in our case covers the living room, the hallway, and the kitchen that was always the hot zone of the house.

The install, honestly, was the part I feared for no reason. The physical work is a bracket, one 3-inch hole, the line set, and the drain — the kit includes everything down to the putty and foam. And as someone who has assembled her share of flat-pack furniture with "help," I appreciated the small touches: the wires are labeled, the access covers actually fit, the instructions match the hardware. We took our time, tag-teamed it around nap time, and finished in about four hours. The one specialty item you need is a vacuum pump — mine was fifty bucks, and several owners say they just paid an HVAC tech for an hour to do the final vacuum and check their work. My version is 230V, so an electrician added the breaker; that's the one line item I'd tell any mom adding this to the family budget to plan for.

Then the moment: press power, brace for the compressor roar you've been trained to expect — and nothing. The indoor head is a whisper. You feel the air before you hear it. Our toddler finally stopped waking up because the bedroom wall no longer hums, and I'll be honest — the quiet alone felt like a self-care win.

A month in: the room holds 72 without the unit working up a sweat, the app handles scheduling from anywhere (pre-cooling the house from the office before the school run = genius), and the bill math is the real story for us coupon-minded mamas. At 23 SEER2 versus the ancient 10-SEER unit this effectively replaced, the cooling share of our electric bill dropped by about a third. That's real money back in the grocery budget. Come winter, it heats — no, I'm not looking forward to January, but for the first time I'm not dreading it either.

Get the Vario 12K on Amazon — free returns: Get it here

2. DELLA Motto 12,000 BTU Mini Split — Best Value

Same 550-square-foot coverage, same pre-charged DIY kit, same inverter efficiency — the Motto just runs a 19 SEER2 rating instead of the Vario's 23, and it shows in the price. At $749.96 with 842 ratings averaging 4.3 stars, it's the one I'd hand any mama whose question is "which one is cheap and good?" The efficiency gap pencils out to a few dollars a month in moderate climates; in a mild one, this is the smarter buy — and as the resident deal-hunter of this blog, smarter-buy is my love language.

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3. DELLA Optima 12,000 BTU Hyper Heat Mini Split — For Real Winters

The Optima is the Vario's cold-weather sibling: same 550-square-foot coverage, same 23 SEER2, Energy Star certified — but with hyper-heat technology that keeps heating when the outdoor thermometer dives to -13°F, where standard heat pumps start quietly underperforming. It's also a 115V unit, which I'll get to in the buying guide, because that one detail can save you an electrician's invoice. Soft-airflow louvers heat the room without feeling like a hair dryer. Currently $853.56, down from $969.96 — if you're in a snowy state, that markdown is worth grabbing.

Get the Optima 12K on Amazon — free returns: Get it here

4. DELLA Umbra 12,000 BTU Mini Split — The No-Electrician Pick

The Umbra's pitch is simple: full 12,000 BTU, 550-square-foot capacity, 20 SEER2 efficiency, Alexa and WiFi — on a 115V plug. Most mini splits this size want a 230V circuit, which means a breaker box visit. The Umbra runs on a standard outlet circuit, which makes it the closest thing to a true weekend-only install in the line-up — no coordinating an electrician around work calls and carpools. 240 buyers, 4.3 stars. If your panel is full or your landlord says no, this is your unit.

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5. DELLA Vario 9,000 BTU Mini Split — Bedrooms & Offices

Same Vario formula, sized down for a single bedroom or home office up to 400 square feet — Energy Star rated, Alexa-enabled, pre-charged kit included. This is the second unit going on our wall: one zone for the living space, one for the bedroom, and the central system never comes on again. For all the work-from-home mamas sweating through afternoon calls in a stuffy office nook — this is your fix. Smaller load, smaller price, smaller electric bill.

Learn more on Amazon

6. DELLA 24,000 BTU Ultra Hyper Heat — Whole Floors, Real Winters

When one wall unit isn't the plan — an open floor plan up to 1,500 square feet, a drafty farmhouse, a shop — the 24K is a 2-ton, 22.5 SEER2 Energy Star heat pump with ultra hyper heat that keeps working to -22°F. Soft airflow, WiFi, Alexa, and enough capacity that owners use it as their actual whole-home system instead of supplementing one. At $2,249.96 it's the serious-money option on this list, and the one I'd point northern mamas at. Plan on a pro for the 230V circuit and, ideally, the commissioning — delegate this one, you have enough on your plate.

Get the 24K on Amazon — free returns: Get it here

What Other Owners Are Saying

I went through the owner feedback before ordering — skeptical, looking for the dealbreakers — and three patterns held up everywhere.

The installs go faster than people expect. Single-zone jobs run three to four hours in most accounts, and the gallery reads like a DIY forum: garage setups, workshop installs, one couple who documented three condensers and five indoor units in a single weekend. The recurring advice is the same I'd give: budget for a vacuum pump or an hour of an HVAC tech's time to vacuum the lines, and it stops being scary.

The quiet is the thing nobody believes until it's on their wall. Owner after owner says the same thing in different words — they can't tell whether it's running, inside or out. That was my experience too; the outdoor unit is quieter than the refrigerator in our garage. Translation for moms of light-sleeping kids: this changes bedtime.

People keep buying their second and third units. On Della's own store, the Vario 12K runs 4.8 stars across 30 reviews with nothing below four — and half the write-ups end with some version of "ordering another one for the other room." At the brand level, nearly 800 Trustpilot reviews average four stars, and the recurring details are the unglamorous kind that signal quality: labeled wiring, access covers that line up, putty and tape actually included.

The honest footnote, which I lived: 230V models need an electrician for the circuit. That's not a Della thing, it's a physics thing — but plan the line item so it's not a surprise.

Why a Mini Split Instead of Anything Else

Window units block the view, leak air, and get stolen off first-floor sills. Portables are brilliant for renters but you're paying to cool a hose. Central air means ducts you don't have, or ducts that leak a fifth of their air into an attic, and a thermostat that heats and cools empty rooms all day — while you're at the office earning the money that pays for it.

A ductless mini split solves the actual problem: one quiet wall unit, the room you're in, heating and cooling, on a schedule, for about a third of what I'd assumed the project cost. Between the pre-charged line sets and the kit-in-the-box approach, the "contractor project" I'd been avoiding turned out to be one Saturday, one patient husband, and one vacuum pump.

My Buying Guide on Della Mini Splits

SEER2 is the number that pays you back. It's efficiency — cooling output per watt. The jump from 19 (Motto) to 23 (Vario/Optima) SEER2 costs about $30-100 up front and returns a few dollars a month in moderate climates, more in hot ones. In a mild climate, take the Motto and pocket the difference. In Texas, Arizona, anywhere the compressor runs April to October, buy the 23.

Check your voltage before anything else. This is the step everyone skips. 115V units — the Optima 12K, the Umbra 12K — can run off existing household circuits. Most other 12K-plus models are 230V and need a dedicated breaker, which means an electrician. It's a half-day and a couple hundred dollars, not a dealbreaker — but know before you order.

DIY is realistic for one zone. Pre-charged line sets under 25 feet don't need refrigerant handling — mount, connect, vacuum, power on. Borrow or buy the vacuum pump, or pay a tech an hour to commission it. Multi-zone and 24K-plus systems: hire it out. Your weekend time is precious — spend it where it counts.

Hyper heat is worth it exactly where it's worth it. If your winters regularly drop below 20°F, the Optima (-13°F) or the 24K (-22°F) will still be heating when standard units switch to resistance strips. If your winters are mild, that money is better spent on SEER2.

Size for the room, not the block. 9K for a bedroom up to 400 square feet, 12K for 550, 24K for 1,500 of open plan. Oversized units short-cycle and dehumidify worse, not better.

Learn more on Amazon →

The Honest Summary, One Month In

Our living room finally holds a temperature, my toddler sleeps through the night in a quiet room, the unit is quieter than the fridge it sits next to, and our mid-summer electric bill is the lowest I've posted in years — savings that went straight into the vacation fund. My only regret is the three summers I spent making fun of my neighbor's wall unit before I understood what she was smiling about.

If a budget-savvy working mom with a drill-wielding husband and a supervising toddler can do this in a Saturday, so can you. And if you've been "renting the problem" like I was — this is your sign, mama.

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Specs verified against Della's official product documentation and Amazon listings. Your results will vary with insulation, sun exposure, climate, and electrical setup. This article contains affiliate links — if you buy through them, it supports more reviews like this one, at no extra cost to you.