What is the SEER2 rating of the Guardian RHP15048B21?

The Guardian RHP15048B21 is rated at up to 16.0 SEER2 and 11.7 EER2 for cooling and up to 8.1 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 58 certified matchups SEER2 ranges from 15.2-16.0.

Is the Guardian RHP15048B21 good for cold climates?

It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 4-ton model.

How much does the Guardian RHP15048B21 cost to run per year?

At its rated efficiency it costs about $1,335-$3,458 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,630 in Phoenix and $2,878 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.

Which indoor units work with the Guardian RHP15048B21?

ENERGY STAR lists 58 certified combinations for this outdoor unit. The highest-rated ones use XAHC60HBCN1, XAHC60HXXN1+TXV, XAFC60HBCN1.

What refrigerant does the Guardian RHP15048B21 use?

It uses R-410A. R-410A is being phased down under the EPA AIM Act, and new systems are moving to R-454B and R-32.

4-ton central heat pump · LX SERIES

Guardian RHP15048B21

Below average cooling and heating efficiency for a 4-ton central heat pump, but not rated for cold climates.

Ranks #240 of 319 4 ton central heat pumps for cooling efficiency, and costs about $1,458 a year to run in a mixed climate like Atlanta.

SEER2: 16.0 Cooling efficiency over a season
Below average · beats 26%
HSPF2: 8.1 Heating efficiency over a season
Below average · beats 20%
EER2: 11.7 Cooling efficiency on a 95°F day
Average · beats 43%
Heat at 5°F: 25,400 BTU/h57% of its 47°F output
Excellent · beats 97%

A good fit if…

You want a choice of indoor units - 58 certified pairings.

Think twice if…

You often see nights below 0°F - it is not cold-climate certified.
Cooling cost matters most - its SEER2 is below average for central heat pumps.
You mainly need heat - its HSPF2 is below average for central heat pumps.
You want the newest refrigerant - it uses R-410A, which is being phased down.

Calculate my running cost

Details

Specifications4 ton, R-410A

General
Brand	Guardian
Also sold as	EVCON
Outdoor unit model	RHP15048B21
Series	LX SERIES
Type	Central heat pump
Nominal size	4 ton
CompressorVariable-speed units run longer at low power	Two-stage
Refrigerant	R-410A
Connected (smart) capable	No
On the market since	May 18, 2023
Last certified	July 7, 2026
Cooling
SEER2Seasonal efficiency, higher is better	16.0 (range 15.2-16.0)
EER2Efficiency at 95°F outdoors	11.7
Cooling capacity	44,500-46,000 BTU/h
Heating
HSPF2Seasonal efficiency, higher is better	7.8-8.1
Capacity at 47°F	43,500-45,500 BTU/h
Capacity at 17°F	29,400-30,800 BTU/h
Capacity at 5°F	23,600-25,400 BTU/h
COP at 5°F2.0 = twice as efficient as a space heater	2.24-2.46
ENERGY STAR cold climate	No

Heating output as it gets colder57% kept at 5°F

Every heat pump delivers less heat as the outdoor temperature drops. Certified output of its matchup with XAHC60HBCN1 at the standard test temperatures, in BTU/h:

Certified matchups58 indoor units

The same outdoor unit scores differently with each indoor unit and furnace. Ask your installer for the AHRI reference number of the exact system you are quoted.

Indoor unit	Furnace	SEER2	EER2	HSPF2	Heat @5°F	AHRI ref.
XAHC60HBCN1	RGF19100CE20MP13	16.0	11.7	8.1	25,400	210348594
XAHC60HBCN1	RGF19100CE20MP13	16.0	11.7	8.1	25,400	210348593
XAHC60HXXN1+TXV	RGF19100CE20MP13	16.0	11.7	8.1	25,400	210348588
XAHC60HXXN1+TXV	RGF19100CE20MP13	16.0	11.7	8.1	25,400	210348587
XAFC60HBCN1	TM8Y120C20MP11	15.2	11.7	8.1	23,800	210348647
XAFC60HBCN1	TM8Y120C20MP11	15.2	11.7	8.1	23,800	210348648
XAFC60HXXN1+TXV	TM8Y120C20MP11	15.2	11.7	8.1	23,800	210348641
XAFC60HXXN1+TXV	TM8Y120C20MP11	15.2	11.7	8.1	23,800	210348642
XAHD60GBCN1	RGF1L100CE20MP12	15.2	11.7	7.8	24,000	210347563
XAHD60GBCN1	RGF1L100CE20MP12	15.2	11.7	7.8	24,000	210347564
XAHD60GBCN1	TM9Y120D20MP11	15.2	11.7	7.8	23,600	210347170
XAHD60GBCN1	TM9Y120D20MP11	15.2	11.7	7.8	23,600	210347171
XAFD60HBCN1	TM9Y100C16MP11	15.2	11.7	7.8	23,800	210347625
XAHC60GBCN1	RGF19080CE20MP13	15.2	11.7	7.8	24,000	210347346
XAFD60HBCN1	TM9Y100C16MP11	15.2	11.7	7.8	23,800	210347626
XAFD60HBCN1	TM9Y120D20MP11	15.2	11.7	7.8	23,800	210347607
XAHD60GBCN1	TM8Y100C16MP11	15.2	11.7	7.8	23,600	210347380
XAHD60GBCN1	TM8Y100C16MP11	15.2	11.7	7.8	23,600	210347378
XAHC60GBCN1	RGF19080CE20MP13	15.2	11.7	7.8	24,000	210347347
XAFD60HBCN1	TM9Y120D20MP11	15.2	11.7	7.8	23,800	210347608
XAHD60HBCN1	TM9Y080C16MP11	15.2	11.7	7.8	25,000	210347644
XAHD60HBCN1	TM9Y080C16MP11	15.2	11.7	7.8	25,000	210347643
XAFC60HBCN1	RGF19080CE20MP13	15.2	11.7	7.8	23,800	210348623
XAFD60HBCN1	RGF19100CE16MP13	15.2	11.7	7.8	23,800	210348606
XAFC60HBCN1	RGF19080CE20MP13	15.2	11.7	7.8	23,800	210348624
XAFD60HBCN1	RGF19100CE16MP13	15.2	11.7	7.8	23,800	210348605
XAFC60HBCN1	TM8Y080C16MP11	15.2	11.7	7.8	23,800	210348659
XAFC60HBCN1	TM8Y080C16MP11	15.2	11.7	7.8	23,800	210348660
XAHC60GBCN1	RG19080C20MPS1	15.2	11.7	7.8	25,000	212416815
XAHC60GBCN1	RG19080C20MPS1	15.2	11.7	7.8	25,000	212416816
XAUD60HXXN1+TXV	TM9Y100C16MP11	15.2	11.7	7.8	23,800	210347631
XAUD60HXXN1+TXV	RGF19100CE16MP13	15.2	11.7	7.8	23,800	210348611
XAUD60HXXN1+TXV	TM9Y100C16MP11	15.2	11.7	7.8	23,800	210347632
XAUD60HXXN1+TXV	RGF19100CE16MP13	15.2	11.7	7.8	23,800	210348612
XAUD60HXXN1+TXV	TM9Y120D20MP11	15.2	11.7	7.8	23,800	210347614
XAUD60HXXN1+TXV	TM9Y120D20MP11	15.2	11.7	7.8	23,800	210347613
XAFD60HXXN1+TXV	TM9Y100C16MP11	15.2	11.7	7.8	23,800	210347619
XAFD60HXXN1+TXV	TM9Y100C16MP11	15.2	11.7	7.8	23,800	210347620
XAHD60HXXN1+TXV	TM9Y080C16MP11	15.2	11.7	7.8	25,000	210347638
XAHD60HXXN1+TXV	TM9Y080C16MP11	15.2	11.7	7.8	25,000	210347637
XAFC60HXXN1+TXV	TM8Y080C16MP11	15.2	11.7	7.8	23,800	210348653
XAFC60HXXN1+TXV	TM8Y080C16MP11	15.2	11.7	7.8	23,800	210348654
XAFD60HXXN1+TXV	RGF19100CE16MP13	15.2	11.7	7.8	23,800	210348599
XAFD60HXXN1+TXV	RGF19100CE16MP13	15.2	11.7	7.8	23,800	210348600
XAHD60GXXN1+TXV	TM9Y120D20MP11	15.2	11.7	7.8	23,600	210347164
XAHD60GXXN1+TXV	TM9Y120D20MP11	15.2	11.7	7.8	23,600	210347165
XAHC60GXXN1+TXV	RGF19080CE20MP13	15.2	11.7	7.8	24,000	210347340
XAHC60GXXN1+TXV	RGF19080CE20MP13	15.2	11.7	7.8	24,000	210347341
XAHD60GXXN1+TXV	TM8Y100C16MP11	15.2	11.7	7.8	23,600	210347370
XAHD60GXXN1+TXV	TM8Y100C16MP11	15.2	11.7	7.8	23,600	210347372
XAHD60GXXN1+TXV	RGF1L100CE20MP12	15.2	11.7	7.8	24,000	210347553
XAHD60GXXN1+TXV	RGF1L100CE20MP12	15.2	11.7	7.8	24,000	210347554
XAFD60HXXN1+TXV	TM9Y120D20MP11	15.2	11.7	7.8	23,800	210347601
XAFD60HXXN1+TXV	TM9Y120D20MP11	15.2	11.7	7.8	23,800	210347602
XAFC60HXXN1+TXV	RGF19080CE20MP13	15.2	11.7	7.8	23,800	210348617
XAFC60HXXN1+TXV	RGF19080CE20MP13	15.2	11.7	7.8	23,800	210348618
XAHC60GBCN1	RG19100C16MPS1	15.2	11.7	7.8	25,200	212416745
XAHC60GBCN1	RG19100C16MPS1	15.2	11.7	7.8	25,200	212416746

Yearly running cost in 10 large cities$1,335-$3,458

Phoenix, AZ$1,630/yr
Miami, FL$1,335/yr
Houston, TX$1,460/yr
Atlanta, GA$1,458/yr
Los Angeles, CA$1,414/yr
New York, NY$3,458/yr
Chicago, IL$2,803/yr
Denver, CO$2,327/yr
Seattle, WA$1,427/yr
Minneapolis, MN$2,878/yr

At each state's average electricity price and the city's typical heating and cooling hours.

Questions5

What is the SEER2 rating of the Guardian RHP15048B21?: The Guardian RHP15048B21 is rated at up to 16.0 SEER2 and 11.7 EER2 for cooling and up to 8.1 HSPF2 for heating. The exact figure depends on the indoor unit it is paired with; across its 58 certified matchups SEER2 ranges from 15.2-16.0.
Is the Guardian RHP15048B21 good for cold climates?: It is not cold-climate certified: none of its matchups meet the ENERGY STAR cold-climate criteria (a COP of at least 1.75 at 5°F among other limits). In places with frequent sub-zero nights, pick a cold-climate 4-ton model.
How much does the Guardian RHP15048B21 cost to run per year?: At its rated efficiency it costs about $1,335-$3,458 a year in electricity in large U.S. cities, depending on climate and local rates - for example $1,630 in Phoenix and $2,878 in Minneapolis. The calculator on this page works it out for your city and compares it with your current system.
Which indoor units work with the Guardian RHP15048B21?: ENERGY STAR lists 58 certified combinations for this outdoor unit. The highest-rated ones use XAHC60HBCN1, XAHC60HXXN1+TXV, XAFC60HBCN1.
What refrigerant does the Guardian RHP15048B21 use?: It uses R-410A. R-410A is being phased down under the EPA AIM Act, and new systems are moving to R-454B and R-32.

Running cost and savings

Pre-filled with this model. Pick your city and what you heat with today; everything else is optional.

Heat pump $1,609/yrYou save $712/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 Guardian RHP15048B21

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: $1,609
Current system, per year: $2,322
You save per year: $712
Payback: 23.9 years
Net after 10 years: -$9,878

Cooling $1,001Heating $608Electricity used: 10,059 kWhSaved vs. a minimum-efficiency heat pump: $168

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.

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Coleman XH648E2S1116.0 SEER2 · 8.1 HSPF2
Mainline MLP15AY48AJ2N · cold climate16.0 SEER2 · 8.1 HSPF2
Coleman XH548E2S1116.0 SEER2 · 8.1 HSPF2
MDV MOX630-60HFN10-M3F · cold climate16.0 SEER2 · 8.1 HSPF2
Coleman THF2B48T2116.0 SEER2 · 8.1 HSPF2
Midea MO1AE-H60B-2A · cold climate16.0 SEER2 · 8.1 HSPF2

See all 319 4 ton central heat pumps, ranked

Source: ENERGY STAR Certified Heat Pumps (U.S. EPA), certification of July 7, 2026. How we use the data.