Pioneer Diamante Pro 9,000 BTU 115V wall mount system (WYT-20S)
Pioneer Diamante Pro · Single-zone systems · 9,000 BTU
$898 at Pioneer · checked Oct 14, 2026
Pioneer Diamante Pro 9,000 BTU 115V wall mount system (WYT-20S) (WYT009ALSI20RL) is a 9,000 BTU system from Pioneer Diamante Pro. It has a wall mount indoor unit, runs on 115V, is rated 19 SEER2, has an HSPF2 of 9.5, puts out 7,300 BTU/h of heat at 5 °F, heats down to -4 °F by the brand's rating, uses R-454B refrigerant, comes with a 16 ft line set, and carries a 5-year compressor warranty. Lowest in-stock price on file: $898 at Pioneer (checked Oct 14, 2026).
| Category | Single-zone systems |
|---|---|
| Model number | WYT009ALSI20RLpioneerminisplit.com |
| Size ? | 9,000 BTU/hpioneerminisplit.com |
| Indoor unit style ? | Wall mountpioneerminisplit.com |
| Voltage ? | 115Vpioneerminisplit.com |
| Outdoor unit model | YN009ALSI20RPFpioneerminisplit.com |
| Indoor unit model | WT009ALSI20HLFpioneerminisplit.com |
| SEER2 (cooling efficiency) ? | 19energystar.gov |
| EER2 (efficiency at 95 °F) ? | 11.7energystar.gov |
| HSPF2 (heating efficiency) ? | 9.5energystar.gov |
| Rated cooling capacity ? | 9,000 BTU/henergystar.gov |
| Heating capacity at 47 °F ? | 10,000 BTU/henergystar.gov |
| Heating capacity at 17 °F ? | 8,000 BTU/henergystar.gov |
| Heating capacity at 5 °F ? | 7,300 BTU/henergystar.gov |
| COP at 5 °F ? | 1.9energystar.gov |
| Heats down to ? | -4 °Fpioneerminisplit.com |
| Refrigerant ? | R-454Benergystar.gov |
| ENERGY STAR certified ? | yesenergystar.gov |
| ENERGY STAR cold climate ? | yesenergystar.gov |
| Line connection ? | Flarepioneerminisplit.com |
| Line set included | 16 ftpioneerminisplit.com |
| Wi-Fi control | — |
| Indoor sound level (quietest) | 28 dB(A)pioneerminisplit.com |
| Outdoor sound level | 54 dB(A)pioneerminisplit.com |
| Room size (brand's claim) | 350 sq ftpioneerminisplit.com |
| Compressor warranty ? | 5 yearspioneerminisplit.com |
| Parts warranty ? | 5 yearspioneerminisplit.com |
| Warranty if you install it yourself ? | Keptpioneerminisplit.com |
| Outdoor unit size (W×D×H) | 31 × 11.5 × 19.38 inpioneerminisplit.com |
| Indoor unit size (W×D×H) | 31.88 × 8 × 11.5 inpioneerminisplit.com |
| Outdoor unit weight | 51.8 lbpioneerminisplit.com |
| Sold as | Single product |
| Availability | Sold by several retailers |
Warranty, and installing it yourself
Self-installing keeps the warranty, by Pioneer's own terms.
The policy sets no installer requirement; it excludes damage from faulty installation. "Obtaining Warranty Service: To obtain warranty service, owner must first contact the installer or any other qualified contractor, to determine the cause of the failure and diagnose the Product."
From pioneerminisplit.com ↗, read 2026-10-14. Terms change, and local law can require a licensed technician for refrigerant or electrical work whatever the warranty says.
- 5 years on the compressor
- 5 years on parts
"5 Year Product Guarantee We offer a generous parts and compressor warranty for up to 5 years."
From pioneerminisplit.com ↗, read 2026-10-14.
Who makes it
inferred Most likely made by TCL. Its ENERGY STAR certification lists exactly the same figures (capacity at 47, 17 and 5 °F, SEER2, EER2, HSPF2, COP and refrigerant) as a model TCL certifies under its own name. the TCL record ↗
ENERGY STAR record 4520565 (Pioneer YN009ALSI20RPF + WT009ALSI20HLF) has the same cooling and heating capacities, SEER2, EER2, HSPF2, COP at 5 °F and refrigerant as record 3554593 (TCL TSH09HEI1NAJ0X24* + TSH09IEI1NAJ0X24), which TCL Air conditioner (Zhong Shan) Co., Ltd. certifies itself. 4 records from other certifiers share the set.
The same certified figures, sold as
- DELLA Vario 9,000 BTU 115V wall mount system · $749.96 at DELLA
Where to buy
Prices are re-checked every week. A date more than a month old means the store could not be re-read, so the price may have moved.
Price history
Price tracking for this product began October 14, 2026. Prices are re-checked every week, and the chart fills in from the next check.
Every recorded price change (1)
A row is recorded only when a store's price or stock changes; each line then runs to the date the store was last checked. Amazon prices aren't shown (store policy).
Where this came from
confirmed The part number and every spec shown were read from the brand's or a store's own material: a product page, a spec sheet or a product feed, or an archived copy of one. Last verified 2026-10-14. What the labels mean.
The equivalent in other lines
Same category, same size (9k), wall mount, 115V, from other lines; cheapest first, at most two per line. Open any of them side by side with this system, or tick several to compare up to four.