Compare HVAC & refrigeration by use case, features, trade-offs, price, returns, and seller terms before you buy.
Four ventilation ducting air distribution listings: an open-box Selkirk component at $1.08 and three 6-inch 418 CFM IP67 inline duct fans priced from $62.87 to $92.05. Compare price, specs, and warranty before you buy.
Four Dayton hydronic unit heaters range from USD 250 to USD 1,500. Compare airflow, size, and condition details to choose between the 5Pv27, 5Pv52, and 5Pv33 for your workshop or commercial space.
Choose between compact fin-cleaning tools, an eight-brush cleaning pack, and the Bard HVAC 5051-182BX condenser coil by matching the purchase to routine cleaning, fin straightening, or a specific replacement-coil need.
Choose between two hanging Purisystems dust collectors for workshop air circulation and two size-specific HVAC replacement filters for furnace or AC systems, with listed prices from USD 18.99 to USD 299.00.
Choose among four BPV31-style line-tap valves by matching the tubing callout and intended application, then decide whether one valve or the four-piece option fits your job.
Choosing between the $1.99 12146312 and the $9.75 TX81 coolant temperature sensor comes down to your vehicle's make: Chevy, GMC, or Honda versus Dodge, Chrysler, or Jeep TJ 4L. See the fit and price breakdown.
Four MERV 8 pleated filters from $18.95 to $49.99, covering 12x12x1, 14x30x1, 18x18x1, and 18x24x1 sizes. Compare pack counts, three-month filter life, and price to pick the right one.
Four new hot water circulator pumps, from a $51.99 VEVOR model with adjustable power to a $325 flanged Grundfos for hydronic loops, compared by connection type, controls, and price.
Four Commercial Electric smart thermostats-from a touch-and-voice model to an open-box Wi-Fi/Bluetooth pick-compared by price, control style, and condition.
Compare a discharge-line muffler, two liquid-line filter driers, and a quick-connect union across price and use cases, then choose the refrigeration line component that fits your system.
Both recovery machines list at $359.99, but they differ in power and refrigerant coverage. The Uimoso 3/4 HP is lighter and includes high-pressure protection; the 1 HP dual-cylinder tool adds refrigerant range and an oil-less compressor.
The Dayton 5Pv33 delivers 2,200 cfm and up to 180,000 BtuH on steam, while the 5YH19 costs 11% less and fits a narrower space. Compare them side by side to see which unit heater suits your heating needs.
Two portable indoor air quality monitors, one 9-in-1 with a color screen and NDIR CO2 sensing, the other a lower-priced AQI beep alarm monitor with broader real-time readings. Here's how to choose.
Need to move condensate from a furnace, AC, or dehumidifier? We compare the Uimoso automatic pump (65 GPH, 15-ft lift, $42.29) with the Beckett BK221TUL (125 GPH, 22-ft lift, $70.00) to help you match lift, flow, and budget.
Between the $16.80 OEM 37870-RWC-A01 and the $1.99 12146312 coolant temperature sensor, the right call depends on your vehicle and how much fit certainty you want. This head-to-head breaks down where each one wins.
The VEVOR 93W circulation pump delivers up to 40 L/min, a 20 ft head, and three speed settings at a $51.99 price point. We break down who it suits and what to watch for.
This open-box portable monitor tracks PM1.0, PM2.5, PM10, CO2, TVOC, HCHO, temperature, and humidity, with seven AQI beep alarms and a large HD display. Here's who should buy it and what to watch out for.
Looking for a dependable liquid line filter drier? The Ranco 083 RFD-083 offers 3/8 flare connections, 8 cu in capacity, and compatibility with common refrigerants. Here's what to consider before buying.
Compare four Commercial Electric Wi-Fi and Bluetooth smart thermostats priced from $29.95 to $44.75. New and open-box options are covered, with advice on choosing based on included extras and control style.
A two-pack of open-box smart thermostats costs just $10 more than a single new unit. Here's how to choose whether you want two thermostats or one with voice and touch control.
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