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Find Heating and air conditioning pros in Columbia

Old Dominion Heating and Air LLC
5.0(
15
)
Central A/C - Service or RepairGas Furnace / Forced Air Heating System - RepairElectric Furnace / Forced Air Heating System - Repair+9 more

Serving Columbia, VA and surrounding areas

Approved

Super Service Award Winner

In business since 2013

Free estimates

Emergency services offered

"We had excellent service from Old Dominion Heating and Air Conditioning. He called us within in minutes of receiving our request for service. He was out the very next day. Found the problem went over every detail with us. We had 3 other technicians come out from different companies and none of them could find the problem but they didn't even take the cover off to look at the inside of the Mini Split. Old Dominion gave us a fair price to fix the unit and they ordered the parts and had the work done the day after parts arrived. We can say we are more than pleased with their service and would highly recommend them. They went above and beyond to find the problem. Great Job and very polite."
Response time6 hrs
Response rate86%
13 neighbors recently requested a quote
United HVAC Mechanics LLC
New to Angi
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace+8 more

Serving Columbia, VA and surrounding areas

Approved

Emergency services offered

Warranties offered

Offers commercial services

Detail-oriented HVAC Sheet Metal Mechanic and Sub-Contractor with 15+ years of experience in ductwork installation and mechanical systems. Proven expertise in reading blueprints, performing layouts, and ensuring compliance with building codes. Skilled in managing projects and leading teams, with a strong focus on quality and customer service. Holds EPA Type II certification and possesses a comprehensive understanding of HVAC systems, ready to tackle new challenges in the industry.

Avatar for International Mechanical Inc
International Mechanical Inc
New to Angi
Thermostat - Repair or Reprogram

Serving Columbia, VA and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

International Mechanical, Inc. is a licensed and insured HVAC contractor providing residential and light commercial heating and air conditioning services. We specialize in HVAC installation, replacement, repair, and preventive maintenance for air conditioners, heat pumps, furnaces, air handlers, thermostats, ductwork, and indoor air quality systems. Our experienced technicians are committed to delivering reliable workmanship, honest recommendations, and exceptional customer service. Whether you need AC repair, heat pump service, furnace maintenance, refrigerant leak detection, duct modifications, condensate drain cleaning, or a complete HVAC system replacement, we provide efficient, cost-effective solutions to keep your home or business comfortable year-round. We take pride in quality work, fair pricing, prompt service, and customer satisfaction on every project.

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Heating and Air Conditioning questions, answered by experts

When deciding whether to repair or replace your air conditioner, several factors should be considered. It is generally worth repairing the unit if it's less than 10 years old, the warranty is still active, and you're dealing with a one-off issue. Most central AC units last about 15 years, while window units last 8 to 10 years. If your unit is approaching or has surpassed the 10-year mark and requires frequent or costly repairs (e.g., over $5,000), replacement is often the more sensible long-term investment. For older, inefficient, or out-of-warranty units experiencing multiple problems, replacing it is typically the better choice.

If your home has an existing forced-air heat system, you can add a central air conditioner to it. An HVAC technician can retrofit your forced-air heating system by installing an evaporator coil onto the furnace plenum, the box next to the furnace that draws in air. Once installed, the air conditioning coils use the furnace’s blower to circulate the air.

Deciding whether to replace just the AC coil or the entire system depends on the age of your unit and the overall cost. Replacing a coil is less expensive than a full system replacement, but it can still be a pricey repair. If your HVAC system is relatively new and still under warranty, or if the replacement cost is significantly lower than a new system, replacing the coil can be a worthwhile investment that restores efficiency and extends the unit's life. However, for older systems (nearing the end of their 10-15 year lifespan) or those with extensive damage, it is often more cost-effective to replace the entire AC unit. Mismatched coils in an older system can lead to inefficiency and future breakdowns, so a full replacement ensures optimal performance and avoids further costly repairs.

Window AC units use a fair amount of electricity, but significantly less than central AC systems. Because they are more energy-efficient for cooling individual rooms or small spaces, their usage is comparatively low. On average, a window AC unit consumes between 500 and 1,400 watts, while a central AC system uses over 3,500 watts—meaning a window unit uses about one-third of the energy. This typically translates to a monthly running cost of $15 to $40, although this can vary depending on external factors.

Yes, ventless portable air conditioners exist, and not all standard portable air conditioners must be vented through a window.

Ventless portable units, often called evaporative coolers, do not have exhaust hoses. They use a water reservoir and a cooling pad to add moisture to the air, making it feel cooler. These units work best in dry climates because humid areas cannot absorb much additional moisture.

For standard portable air conditioners that do require venting, a window is not the only option; they can also be vented through a door, wall, or ceiling. However, it is essential to vent these units properly. Running a standard portable AC without venting it is counterproductive because it needs to expel heat to cool the room. Failing to do so will only increase the room's temperature.

The Columbia, VA homeowners’ guide to heating and air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.