How energy-efficient is the Pioneer Diamante Essenza 11,500 BTU Ductless Mini Split 115V?

Its efficiency rating is SEER2 17.

Do I need a professional to install the Pioneer Diamante Essenza 11,500 BTU Ductless Mini Split 115V?

Yes. As a single split it needs a certified installer. Usually needs permission.

How cold can it get outside before the Pioneer Diamante Essenza 11,500 BTU Ductless Mini Split 115V stops heating?

Its retailer's specification for this exact configuration rates it to keep heating down to 5°F outdoors. That is its operating limit, not its full output: a heat pump delivers less heat as it gets colder, so size it for your coldest days.

Single splitSEER2 17 Heats too

Pioneer · Model WYT012ALUI17RL

Diamante Essenza 11,500 BTU Ductless Mini Split 115V

Name: Pioneer Diamante Essenza 11,500 BTU Ductless Mini Split 115V
Brand: Pioneer
Price: 688 USD
Availability: InStock

A wall-mounted split air conditioner rated at 11,500 BTU for rooms up to 500 sq ft. It heats in winter too.

$688

Live price at Sylvane

Price checked Oct 27, 2026

Buy at Sylvane In stock

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Price history at Sylvane

Lowest since Jul 25, 2026:$688on Oct 22, 2026

Currently the lowest price we have tracked at Sylvane since Jul 25, 2026down from $691 on Oct 21, 2026

Based on 80 prices we have recorded since Jul 25, 2026, not a market average.

Will it cool your room?

Room size (assumed)450 sq ft ≈ 41.8 m²

Fits a 450 sq ft room

This unit's cooling matches a 450 sq ft room. Set your room size to check the fit for your space.

Running cost

Mini-splits are rated on SEER2, a seasonal scale, not the ENERGY STAR annual-kWh figure this dollar estimate is built from, so there is no comparable figure to show here. A blank is missing data, not a worse result: a mini-split is often the more efficient choice.

Installation cost

$2,500-6,000 fully installed for a typical room (the equipment is roughly $700-1,800, professional installation roughly $1,500-4,000+ depending on line-set run, electrical and access). The unit price you see here is hardware only; installation is the larger, separate cost.

A typical range for this system type, for comparison only, not a quote for this unit. The actual price depends on the line-set run, electrical work and access.

What each mini-split size costs today

Every mini-split side by side

At a glance

Best for larger open-plan rooms.

Cooling

11,500 BTU

Size

Compact

Noise

53 dB

Audible

Install: Certified installerPermission: Usually needs permission

Performance

Cooling capacity: 11,500 BTU · 3.4 kW
Power while cooling: About 1,211 W, about $0.22 an hour
Heating capacity: Yes
Heats down to: 5°F outdoors
Room coverage: up to 500 sq ft
Energy Star: Not published
SEER2: 17
EER2: 9.5
Annual energy (cooling): Not published

Noise, size & features

Model number: WYT012ALUI17RL
Indoor noise: 53 dB(A)about as loud as a dishwasher
Outdoor noise: Not published
Indoor unit: 30.5 x 9.75 x 7.88 in
Outdoor unit: 31 x 19.36 x 11.5 in (W x H x D)
Refrigerant: R-32
Wi-Fi / app: Not published
Outdoor unit needed: Yes
Power supply: 115 V
Warranty: 5-Year Parts and Compressor Warranty (With Registration)

SEER2, EER2, heating limit, supply voltage, refrigerant, outdoor unit size and warranty are from Sylvane's published specifications for this exact configuration, checked Oct 2, 2026.

Power while cooling: From its rated cooling capacity divided by its EER2 rating, which is the draw at its rating point (95°F outside). An hour's cost is at that draw and the US average electricity price of 18.44¢/kWh (U.S. Energy Information Administration, Electric Power Monthly Table 5.6.A (residential average, May 2026)). The compressor cycles once the room is cool, so most hours cost less.

What is good

Uses R-32 (GWP 675), the low-GWP class new US residential equipment moved to.

What to watch

Its SEER2 17 is less efficient than 69 of the 73 other mini-splits we list with a published SEER2.

Installation & the rules that apply

This is a single split. This is where regulation bites. Under EPA Section 608 the refrigerant circuit may only be opened by a certified technician, and the EPA is explicit that this includes connecting or disconnecting the pre-charged line sets sold with "DIY" mini-split kits. No federal law stops you doing the mounting, bracketing and line routing yourself, but handling the refrigerant without certification voids the warranty and is a violation. Most US jurisdictions also require permits for a new outdoor unit: typically mechanical or building for the wall penetration and mount, plus electrical for the dedicated 240 V circuit and disconnect. An HOA nearly always has to approve exterior equipment in advance, and local noise ordinances can cap how loud the condenser may be at the property line. This varies by city and county, so confirm with your building department before buying hardware.

Installation

Certified installer

Refrigerant

R-32

GeneralRenters: get written landlord consent firstReviewed June 2026Often blocks install

United StatesUS: EPA Section 608 certified technician for refrigerantReviewed June 2026Often blocks install

ArizonaArizona: municipal mechanical permit for AC replacementReviewed June 2026Permit required

CaliforniaCalifornia: Title 24 permit and HERS verificationReviewed June 2026Permit required

FloridaFlorida: hurricane wind-load anchoring of outdoor unitsReviewed June 2026Permit required

See full rules by region

Common questions about the Pioneer Diamante Essenza 11,500 BTU Ductless Mini Split 115V

How loud is the Pioneer Diamante Essenza 11,500 BTU Ductless Mini Split 115V?: 53 dB(A) indoors, about as loud as a dishwasher.
How energy-efficient is the Pioneer Diamante Essenza 11,500 BTU Ductless Mini Split 115V?: Its efficiency rating is SEER2 17.
How many watts does the Pioneer Diamante Essenza 11,500 BTU Ductless Mini Split 115V use?: About 1,211 watts while cooling at full power: its rated 11,500 BTU divided by its EER2 of 9.5, the draw at its rating point (95°F outside). At the US average electricity price that is about $0.22 an hour; once the room is cool the compressor cycles, so most hours cost less.
What size room does the Pioneer Diamante Essenza 11,500 BTU Ductless Mini Split 115V cool?: It is rated to cool a room up to 500 sq ft (11,500 BTU · 3.4 kW).
Do I need a professional to install the Pioneer Diamante Essenza 11,500 BTU Ductless Mini Split 115V?: Yes. As a single split it needs a certified installer. Usually needs permission.
Does the Pioneer Diamante Essenza 11,500 BTU Ductless Mini Split 115V heat as well as cool?: Yes. It also heats.
How cold can it get outside before the Pioneer Diamante Essenza 11,500 BTU Ductless Mini Split 115V stops heating?: Its retailer's specification for this exact configuration rates it to keep heating down to 5°F outdoors. That is its operating limit, not its full output: a heat pump delivers less heat as it gets colder, so size it for your coldest days.