Cold-climate ducted heat pumps Full heating capacity down to sub-zero temperatures at up to 21.5 SEER2 efficiency. Sold by system type. We confirm your exact unit and final price before your card is charged. Also available — 13.5 kWh LFP home battery Lithium iron phosphate storage with an integrated 11.5 kW inverter and six solar MPPTs, stackable to four units per site. Rated IP67 for indoor or outdoor installation. Answer four questions about the space, the climate, and your panel. We match a system from stock and hand it to a licensed installer near you. Financing Use the payment calculator to estimate monthly cost, or request financing help at checkout. Warranty Coverage follows the manufacturer's current policy. We coordinate any claim or return on your behalf, and confirm your specific terms before you order. Partner network Check installer coverage in your ZIP, or join our partner network if you're a licensed contractor. SEER2 Cooling output divided by the electricity it takes to produce, measured across a whole season rather than at one perfect moment. A 21 SEER2 unit does the same cooling as a 14 SEER2 unit on roughly a third less power. Rule of thumb — 16+ pays back in hot climates HSPF2 The heating-season counterpart to SEER2. It matters more than SEER2 if your winters are long, and it is the number to compare when you are deciding between a heat pump and keeping a furnace. Rule of thumb — 8.5+ for cold climates Tonnage One ton equals 12,000 BTU per hour of heat moved. Oversizing is the most common mistake: a too-big system short-cycles, never runs long enough to pull humidity out, and wears itself out early. Rule of thumb — 400–600 sq ft per ton AFUE For gas equipment, the percentage of fuel converted to usable heat. A 96% furnace sends 4% up the flue; an old 80% unit sends a fifth of what you pay for outdoors. Rule of thumb — 90%+ is condensing UEF Uniform Energy Factor covers standby losses as well as heating. Heat pump water heaters land near 3.8, meaning they deliver nearly four units of heat per unit of electricity, versus about 0.95 for resistance. Rule of thumb — 3.0+ means heat pump Variable speed A single-stage system is either full blast or off. An inverter modulates, running long and low, which holds temperature within a degree, cuts noise, and dehumidifies far better at the same setpoint. Rule of thumb — quieter and steadier, costs moreSimple systems,
efficient for
every space.Keep the heat
on when the
grid drops.Featured systems
All 159 products →
Not sure what your house needs?
Financing options available
Manufacturer warranty, we coordinate
Licensed installer referrals
Know what you're buying
The numbers that matter
How efficiently a system cools all season
The same idea, for heating
Capacity, not weight
How much fuel becomes heat
Water heater efficiency
Why inverters feel different
Homepage
13
System categories
21.5
Max SEER2 efficiency
6
Free sizing & savings tools
13.5 kWh
Usable capacity
11.5 kW
Continuous output
97.5%
Round-trip efficiency
Climate Clean
15.2 SEER2 Variable Speed Heat Pump System
$11,850
Climate Clean
12,000 BTU Single-Zone Ductless Mini-Split
$5,700
Climate Clean
585W Bifacial Solar Panel
$644
Climate Clean
Standby Generator
$9,224
Climate Clean
Condensing Tankless Gas Water Heater (Mid-Size Home)
$3,975
Climate Clean
True HEPA Air Purifier with Dual Pre-Filter (1,560 sq ft)
$720
Climate Clean
Level 2 Home EV Charger (Universal Wall Connector)
$713
Climate Clean
Smart Thermostat with Auto-Schedule Learning
$375
Installer
referrals
We help you find a licensed installer in your area.
6
System categories
Searchable by size and capacity, not part number.
1 day
Order confirmation
Sourced to order from our distributor network. Most orders confirm within one business day.
50
States of sizing & rebate data
Every calculator on this site is calibrated to real climate-zone and rebate data for all 50 states.