# Heat Pump Installation and Replacement in Renton, WA

> Heat pumps in Renton, where City Light serves some streets and PSE the rest. See how your utility changes running costs, rebates and system choice.

URL: https://seattleheatpumpco.com/service-areas/renton/

Updated: 2026-10-21

Heat pump installation in Renton comes with a question most of King County never has to ask: which utility sells electricity to your street. [The Seattle Heat Pump Company](https://seattleheatpumpco.com/) plans and manages ducted heat pump projects across the Highlands, Kennydale, Talbot Hill, Benson Hill, downtown Renton and neighboring Fairwood, with the work carried out by licensed and insured contractors.

Seattle City Light serves part of Renton and Puget Sound Energy serves the rest. The answer changes your electric rate, the rebates you can claim and whether an all-electric heat pump or a dual fuel system makes more sense, so it is the first thing settled on any Renton project.

## Two utilities, two sets of numbers

City Light's current rate for its Renton customers is 13.56 cents per kWh, close to its Seattle rate of 13.38 cents. PSE's average residential rate is about 20.6 cents. That gap carries straight through to the heating decision.

| If your electricity comes from | Energy rate | COP needed to beat a 95% gas furnace | Main incentive |
|---|---|---|---|
| Seattle City Light (Renton portion) | 13.56¢ per kWh | About 2.3 | City Light contractor discount, $300 or $600 |
| Puget Sound Energy | About 20.6¢ per kWh | About 3.4 | PSE rebates through a PSE Trade Ally |

The coefficient of performance, or COP, is how many units of heat a heat pump delivers for each unit of electricity. Modern variable-speed equipment averages well above 2.3 through a western Washington winter, so on City Light power a heat pump almost always heats more cheaply than gas. Above 3.4 is harder to hold as temperatures drop toward freezing. On PSE power, a heat pump still wins in mild weather, while a gas furnace can be cheaper on the coldest days. The [operating cost guide](https://seattleheatpumpco.com/guide/heat-pump-operating-cost-seattle/) shows how the numbers play out for a given house.

## What that means for the system you choose

**On City Light power,** most gas-heated houses do best with a [furnace to heat pump conversion](https://seattleheatpumpco.com/furnace-to-heat-pump-conversion/) that lets the heat pump carry the heating, with electric backup that code keeps off above 40°F. Keeping the furnace as backup adds equipment for little running-cost benefit.

**On PSE power,** [a dual fuel heat pump](https://seattleheatpumpco.com/dual-fuel-heat-pump/) deserves a close look. The heat pump runs most of the season and all summer, and the furnace takes over below a changeover temperature set from your rates. PSE's hybrid rebate of $1,500, or $2,400 with its income-based Efficiency Boost, applies when you buy both gas and electricity from PSE. PSE also pays $1,500 or $2,400 for replacing electric resistance heat, and $4,000 to income-qualified gas customers who switch to a heat pump. Since April 2, 2026, PSE requires a PSE Trade Ally for these installs. The [PSE rebate guide](https://seattleheatpumpco.com/guide/pse-heat-pump-rebates/) tracks the conditions.

PSE has requested further increases of 17.75% for electricity and 12.93% for gas. Neither has been approved, so the comparison above uses current rates.

## Renton's housing leans newer

Renton grew late. The 2000s are its largest single decade of construction, about 19.7% of homes, followed by the 1990s at 16.2%, according to Census estimates. Only about 3.1% of homes predate 1940. About 40.5% of households heat with utility gas, and oil is rare at 0.7%.

Newer construction shifts the typical project. Where a house from the 1990s or 2000s has a gas furnace and ducts, the ducts were designed for a blower-driven system from the start. Some of those houses also have central air, and some already have a heat pump. In those houses the work is often a [heat pump replacement](https://seattleheatpumpco.com/heat-pump-replacement/) or adding a heat pump in place of an aging air conditioner, rather than a conversion from scratch.

Newer does not mean the ducts can be skipped. Ducts in attics and crawlspaces still leak, and a duct system designed around a furnace's airflow can still run short of the extra air a heat pump moves in heating. A static pressure test with the blower running tells you which you have before equipment is chosen.

## The refrigerant rule and replacements

Since January 1, 2026, Washington's Department of Ecology has required newly installed residential air conditioners and heat pumps to use refrigerants with a global warming potential under 750. R-410A, the refrigerant in most systems installed over the last 15 years or so, no longer qualifies. A replacement uses one of the newer A2L refrigerants, and the indoor coil or air handler has to be matched to it. The existing line set may be reusable if its size suits the new equipment and it passes a pressure test. The [replacement cost guide](https://seattleheatpumpco.com/guide/heat-pump-replacement-cost-seattle/) explains how those pieces affect the price.

## Sizing, permits and commissioning

The load calculation follows ACCA Manual J, room by room, so the heat pump fits the house's actual heat loss rather than the old equipment's nameplate. The design temperatures listed in Seattle's energy code for nearby stations are 24°F for Seattle and Bellevue and 25°F for Auburn, and the right design condition for a Renton address is confirmed in the calculation.

The City of Renton issues its own electrical permits and building permits, so Seattle's permit steps and fees do not apply. After installation, commissioning verifies airflow, refrigerant charge, defrost operation, backup heat or furnace changeover settings, and the thermostat.

[Bellevue](https://seattleheatpumpco.com/service-areas/bellevue/) to the north is all PSE territory. [Burien](https://seattleheatpumpco.com/service-areas/burien/) to the west buys power from City Light on its suburban rate, and [Rainier Valley and Seward Park](https://seattleheatpumpco.com/service-areas/rainier-valley-seward-park/) lies to the northwest inside Seattle.

## Around Renton

**Neighborhoods:** Highlands, Kennydale, Fairwood, Talbot Hill, Benson Hill, Downtown Renton

**Landmarks:** Gene Coulon Memorial Beach Park, The Landing, Renton Municipal Airport, Cedar River Trail

**Main routes:** I-405, SR 167, SR 169, SR 900, Rainier Ave S

**Utility:** Seattle City Light or PSE (electric, depending on address)

**Permits:** City of Renton (building and electrical permits)

## Renton heat pump questions

### How much does a heat pump cost in Renton?

Renton has no price band of its own. A ducted heat pump on usable ducts typically runs about $6,700 to $20,000 in the Seattle area, and replacing an existing ducted heat pump like for like about $6,700 to $15,000. Your utility changes the rebates and the net price, not the installation work. These are budgeting ranges, not quotes.

### How do I know whether City Light or PSE serves my Renton house?

Look at the electric bill. Seattle City Light serves part of Renton and Puget Sound Energy serves the rest, and the line does not follow neighborhood names. The utility on your bill decides your electric rate, which rebates apply and whether a dual fuel setup is worth considering, so it is the first thing to confirm.

### Is a heat pump cheaper to run than gas in Renton?

On City Light's Renton rate of 13.56 cents per kWh, a heat pump beats a 95% efficient gas furnace once it averages a coefficient of performance of about 2.3, which modern units clear most of the winter. On PSE electricity at about 20.6 cents, the break-even rises to about 3.4, so savings on heating are smaller.

### My Renton house already has a heat pump. What changes when it is replaced?

Since January 1, 2026, Washington requires new residential heat pumps to use a refrigerant with a global warming potential under 750, which excludes R-410A. A replacement uses a newer refrigerant, usually with a matched indoor coil or air handler, and the existing line set is reused only if its size and condition test sound.

### Who issues heat pump permits in Renton?

The City of Renton issues its own building and electrical permits, so Seattle's permits and fees do not apply. The permit steps and inspections are confirmed for each project, along with any setback or noise limits that affect where the outdoor unit can go on your lot.