Do heat pumps work in Gresham winters?

Winters in Gresham are moderate - about 1.1 nights a year at or below 20°F - and any modern variable-speed heat pump handles them. The average winter low is 37°F, and the heating season adds up to 4,155 heating degree days (NOAA 1991-2020 normals).

How much does it cost to run a heat pump in Gresham?

A typical 3-ton central heat pump (17.0 SEER2, 9.0 HSPF2) uses about $1,028 of electricity a year for heating and $99 for cooling in Gresham, at the Oregon average of 15.6¢/kWh. The most efficient models cost less - see the rankings above.

Is a heat pump cheaper than a gas furnace in Gresham?

Not on heating alone at today's prices: about $1,028 a year with a typical heat pump versus $1,007 with a 95% gas furnace (Oregon averages: 15.6¢/kWh, $1.61/therm). A high-HSPF2 model narrows the gap, and a heat pump also replaces the air conditioner. Against propane, oil or electric heat it is usually far cheaper.

What size heat pump do I need for a 2,000 sq ft house in Gresham?

With average insulation, roughly a 4-ton system: the estimated cooling load is 27,600 BTU/h and the heating load 46,000 BTU/h. Use the size calculator for your own house, and ask installers for a Manual J calculation.

Moderate winters · Mild summers

Best heat pumps for Gresham, OR

Winters in Gresham are moderate - about 1.1 nights a year at or below 20°F - and any modern variable-speed heat pump handles them.

A typical heat pump costs about $1,028 a year to heat a house here and $99 to cool it. A 95% gas furnace would cost $1,007 for the same heat.

Nights at or below 0°F0 a year
Nights at or below 20°F1.1 a year
Days at or above 90°F16 a year
Average winter low37°F
Average summer high79°F
Electricity15.6¢ per kWh
Natural gas$1.61 per therm

Cheapest to run in Gresham

Ranked by yearly electricity cost in this climate, so the balance of heating and cooling efficiency is the one that matters here.

Best 12,000 BTU mini-split

MDV MOX430-12HFN1-MZ60W

12,000 BTU mini-split · MSOP series · cold-climate certified

SEER2: 27.5
HSPF2: 14.5
Per year here: $233

For one large room.

Full specs and running cost

Best 24,000 BTU mini-split

SLIMAIR SHC24VH2AG

24,000 BTU mini-split · SHC Series · cold-climate certified

SEER2: 27.5
HSPF2: 14.5
Per year here: $466

For open-plan floor or small home.

Full specs and running cost

Best 3-ton central heat pump

TOSHIBA CARRIER MCY-MUB0368HS2P-UL

3 ton central · cold-climate certified

SEER2: 29.7
HSPF2: 12.2
Per year here: $815

For typical whole house.

Full specs and running cost

Running cost calculator for Gresham

Pre-filled with Gresham's climate and Oregon prices. Pick a model, tell it what you heat with today, and add your quote.

Heat pump $742/yrYou save $168/yrSee details ↓

1. Where you live

StateCityElectricity ¢ per kWh

Adjust heating and cooling hours

Filled in from your city's climate. Change them if you run the system much more or less than usual.

Cooling hours full-load hours per yearHeating hours full-load hours per year

2. The heat pump pick a model or type its ratings

Find a model (fills in the ratings below)

SEER2 cooling efficiencyHSPF2 heating efficiencyCooling capacity BTU/hHeating capacity BTU/h

3. What it replaces

Current heatingFurnace efficiency (AFUE %)Gas price, $/thermCurrent coolingOld AC rating SEER2 (10 ≈ 15+ years old)

4. Price replace the example with your quote

Installed price, $Rebates and incentives, $ utility, state

Heat pump, per year: $742
Current system, per year: $909
You save per year: $168
Payback: Over 30 years
Net after 10 years: -$7,325

Cooling $56Heating $686Electricity used: 4,760 kWhSaved vs. a minimum-efficiency heat pump: $159

Estimates use the unit's rated SEER2 and HSPF2, full-load hours derived from NOAA 1991-2020 degree days, average residential electricity prices from the U.S. EIA (12 months to July 2026) and fuel prices from EIA (2025 for natural gas, week of 2026-10-05 for propane and heating oil). Very cold days that need backup heat are not modelled. Federal minimum for comparison: 14.3 SEER2 / 7.5 HSPF2.

More for Gresham

Top 5 12,000 BTU mini-splitsfrom $233/yr

Model	SEER2	HSPF2	Per year
MDV MOX430-12HFN1-MZ60W	27.5	14.5	$233
Goodman MSH123G26MCAA	27.5	14.5	$233
Fujitsu AOUH12KTAP1	31.5	13.7	$243
Fujitsu AOUG12LZAS1	29.4	12.9	$258
Fujitsu AOUH12KZAH1	30.5	12.7	$261

All 12,000 BTU mini-splits

Top 5 24,000 BTU mini-splitsfrom $466/yr

Model	SEER2	HSPF2	Per year
SLIMAIR SHC24VH2AG	27.5	14.5	$466
MDV MOD30-24HFN10-M1X	22.3	13.5	$507
Arcoaire D5CSHAH24AAK	21.2	13.5	$510
Comfort-Aire A-VHP24SA-1	21.0	13.5	$510
Mainline ML24HP230NEXH-O	22.3	13.3	$514

All 24,000 BTU mini-splits

Top 5 3-ton central heat pumpsfrom $815/yr

Model	SEER2	HSPF2	Per year
TOSHIBA CARRIER MCY-MUB0368HS2P-UL	29.7	12.2	$815
LG KUSXA361A	23.5	10.5	$953
Trane 5TWV0X36A1	21.0	10.5	$962
Lennox SL22KLV-036-230A	20.5	10.5	$963
Lennox EL21KLV-036-230A	20.0	10.4	$974

All 3-ton central heat pumps

Heat pump vs. gas, propane and oilgas is cheaper to run

Yearly cost to heat a typical house (36,000 BTU/h of heat, 1,650 full-load hours) at Oregon prices.

Natural gas furnace, 95% AFUE$1,007/yr
Heat pump (typical, 9.0 HSPF2)$1,028/yr
Natural gas furnace, 80% AFUE$1,195/yr
Propane furnace, 95% AFUE$1,827/yr
Electric baseboard or furnace$2,712/yr
Heating oil, 85% AFUE$3,014/yr

Electricity and natural gas: Oregon residential averages from the U.S. EIA; propane and heating oil: latest EIA weekly prices.

Month by monthpeak $179 in December

Heating and cooling degree days (NOAA 1991-2020 normals) and what a typical 3-ton heat pump costs in each month at 15.6¢/kWh.

Month	Heating DD	Cooling DD	Cost
January	713	0	$176
February	578	0	$143
March	516	0	$128
April	379	3	$95
May	208	19	$56
June	91	46	$33
July	14	144	$37
August	11	154	$39
September	75	57	$32
October	306	4	$76
November	537	0	$133
December	725	0	$179

What size heat pump for a Gresham home?4 ton for 2,000 sq ft

1,000 sq ft house2 ton · heating load 23,000 BTU/h
1,500 sq ft house3 ton · heating load 34,500 BTU/h
2,000 sq ft house4 ton · heating load 46,000 BTU/h
2,500 sq ft house5 ton · heating load 57,500 BTU/h

Average insulation, 8 ft ceilings. Size calculator for your own home

Questions4

Do heat pumps work in Gresham winters?: Winters in Gresham are moderate - about 1.1 nights a year at or below 20°F - and any modern variable-speed heat pump handles them. The average winter low is 37°F, and the heating season adds up to 4,155 heating degree days (NOAA 1991-2020 normals).
How much does it cost to run a heat pump in Gresham?: A typical 3-ton central heat pump (17.0 SEER2, 9.0 HSPF2) uses about $1,028 of electricity a year for heating and $99 for cooling in Gresham, at the Oregon average of 15.6¢/kWh. The most efficient models cost less - see the rankings above.
Is a heat pump cheaper than a gas furnace in Gresham?: Not on heating alone at today's prices: about $1,028 a year with a typical heat pump versus $1,007 with a 95% gas furnace (Oregon averages: 15.6¢/kWh, $1.61/therm). A high-HSPF2 model narrows the gap, and a heat pump also replaces the air conditioner. Against propane, oil or electric heat it is usually far cheaper.
What size heat pump do I need for a 2,000 sq ft house in Gresham?: With average insulation, roughly a 4-ton system: the estimated cooling load is 27,600 BTU/h and the heating load 46,000 BTU/h. Use the size calculator for your own house, and ask installers for a Manual J calculation.

Nearby cities

Climate: NOAA 1991-2020 normals, station PORTLAND TROUTDALE AP (6 km away).