HVAC questions for Alexandria & Northern Virginia.

Look at condition, repair history, performance and the cost of the repair, not age alone. A 14-year-old system with a failed capacitor is a very different decision from one with a leaking coil, a weak compressor and years of humidity complaints.

We diagnose first, give you the repair option when it’s practical, and only recommend replacement when the system’s condition and cost justify it. Repair first, replacement last.

It’s a rough rule of thumb: multiply the repair cost by the system’s age in years, and if the result is over $5,000, replacement is worth considering. It’s a conversation starter, not a decision.

It ignores things that matter more, such as whether the system has been reliable, whether the part is common, and whether the home is comfortable. Use it to frame the question, then look at the actual condition.

Many central air conditioners and heat pumps here run somewhere in the range of 12 to 15 years, and gas furnaces often longer. Heat pumps work year-round, so they tend to wear faster than an AC that only runs in summer.

Maintenance, installation quality, ductwork and how hard the system has to work all shift that range, so treat it as a planning guide, not a deadline.

Yes. Integrity offers a free on-site second opinion on another contractor’s written quote, with no obligation.

Customers have told us another company said their AC couldn’t be fixed and wanted to sell a whole new system; a second look is how you find out. Free visits don’t include extra troubleshooting; if diagnostics are needed, we explain any charge and get your approval first.

The specific equipment (brand, model and size), the full scope of work, the price, the labor warranty terms and how long the quote is valid.

It should also say whether the permit, line set, electrical, condensate and duct modifications are included. If any of that is vague, ask before you sign.

By a load calculation (Manual J) for your house, not by matching the old unit’s nameplate. Insulation, windows, orientation, air leakage and additions all change what the house actually needs.

An oversized system short-cycles and leaves the house clammy; an undersized one runs nonstop on the hottest and coldest days. Ductwork has to match the equipment too.

Yes. Northern Virginia winters are well within what modern heat pumps are built for, and many homes in Mount Vernon, Fort Hunt and across Fairfax County already heat with one.

On the coldest nights a heat pump leans on auxiliary heat (electric strips) or, in a dual-fuel setup, a gas furnace. Cold-climate models hold their capacity better at low temperatures.

A heat pump paired with a gas furnace. The heat pump handles cooling and most of the heating; the furnace takes over when it’s very cold outside.

It’s a common choice for homes that already have gas service and want the efficiency of a heat pump without giving up gas heat on the coldest days.

Heat pumps deliver air that is warm, not hot, and they run longer cycles than a furnace. That’s normal.

If the house isn’t reaching the set temperature, the outdoor unit is iced over for hours, or the auxiliary heat runs constantly, it’s time for a service call.

Light frost in cold, damp weather is normal; the unit runs a defrost cycle to clear it, and you may see steam during defrost.

A thick block of ice that doesn’t clear, or ice on the top of the unit, points to a problem with airflow, refrigerant, the defrost controls or drainage. Turn the system to emergency or auxiliary heat if your thermostat has it, and call. Don’t chip at the ice.

Check that the thermostat is set to heat and has working batteries, that the furnace switch (it looks like a light switch) is on, that the breaker hasn’t tripped, and that the filter isn’t clogged. Make sure the furnace door is fully closed; many furnaces won’t run with it open.

If none of that works, call. Don’t try to relight burners, bypass safety switches or open gas components yourself.

Call for priority service, close off unused rooms, and keep doors shut to hold heat. Let faucets on outside walls drip if pipes are at risk.

Never use an oven, a gas range, a grill or an outdoor heater indoors for heat; they can produce deadly carbon monoxide. If you use a space heater, use one made for indoor use, keep it clear of anything that can burn, and never leave it running unattended.

Not on a schedule, but it’s worth a look after renovation work, after moving into a home with an unknown history, if you find debris or pests in the ducts, or if dust and musty odors keep returning.

We look inside the ducts first and tell you whether cleaning, sealing or repair is what your system actually needs.

It’s usually the ductwork: a long or crushed run, a leaky joint, a missing return, or a room added without anyone resizing the ducts.

We measure airflow before recommending anything. Fixes range from sealing and adjusting dampers to new runs, a return, zoning or a ductless head.

A lot, when ducts run through attics, crawlspaces or garages. Leaks pull in hot, humid or dusty air and push conditioned air where you don’t live.

Sealing joints and repairing damaged sections is often one of the most cost-effective comfort improvements in older Northern Virginia homes.

Roughly 30 to 50 percent works for most homes: lower in deep winter to avoid window condensation, and under about 50 percent in summer to keep things from feeling clammy.

If your house feels sticky even when it’s cool, the AC may be oversized or set up poorly for dehumidification, or the home may need a dehumidifier. Very dry winter air can be helped with a whole-home humidifier.

Use the size your system calls for and a filter your blower can handle. Many homes do well with a MERV 8 to 11 pleated filter; higher ratings capture more but can restrict airflow on systems that weren’t designed for them.

If allergies or pollen seasons are a concern, ask about a media filter cabinet or an air purifier sized for your system rather than forcing a very dense filter into a thin slot.

They can, for the right problem. UV lights at the coil help keep it free of biological growth; purifiers and better filtration reduce particles.

None of them fixes humidity or duct problems, so we start by finding out what is actually going on with your air.

Twice a year is the usual recommendation: cooling in spring and heating in fall. Heat pumps run all year and benefit the most.

Integrity Comfort Plans include two precision tune-ups a year, priority scheduling and repair discounts through a monthly membership.

A technician inspects and cleans key components, checks electrical connections, capacitors and controls, measures airflow and temperatures, checks the condensate drain, and on gas furnaces completes the applicable safety checks.

The point is to catch worn parts and airflow problems before they become breakdowns in July or January.

Check it monthly and change it when it’s dirty: often every one to three months for 1-inch filters, and less often for thicker media filters.

Pets, renovation dust and pollen season all shorten that interval. A clogged filter is one of the most common causes of frozen coils and overheating furnaces.

Turn the system off at the thermostat to stop more water, mop up, and check whether the condensate pan is full or a float switch has tripped.

Leaks usually come from a clogged condensate drain, a cracked pan or a frozen coil thawing. Call for service; if water is near electrical outlets or equipment, keep clear and switch off the system’s breaker if it’s safe to reach.

It can, if it’s set up for a heat pump. A thermostat that isn’t configured for your equipment may call for expensive auxiliary heat every time you raise the temperature.

We install and set up smart thermostats so staging, auxiliary heat and recovery behave the way your system needs.

Generally no. Closing many vents raises pressure in the ducts, increases leakage and can cut airflow across the coil, which hurts efficiency and can freeze an AC coil.

If a room is consistently too hot or too cold, the fix is in the ductwork or zoning, not the vent.

R-22 production and import ended in the U.S. in 2020, so repairs that need refrigerant rely on limited recovered supplies and can be expensive.

A small repair on an R-22 system can still make sense. A major leak or compressor failure is usually the point where replacement is the better value.

They are the lower-global-warming refrigerants that new residential air conditioners and heat pumps have moved to under EPA rules that took effect starting in 2025, replacing R-410A in new equipment.

A2L refrigerants are classified as mildly flammable, so equipment and installation practices are designed around that. Handling any refrigerant requires EPA Section 608 certification; refrigerant work is never a DIY job.

Yes. Existing R-410A systems can still be serviced and repaired, and R-410A remains available for service.

What changed is new equipment. When you replace, the new system will use an A2L refrigerant, and an indoor coil and outdoor unit need to be matched to each other.

SEER2 rates cooling efficiency, HSPF2 rates heat pump heating efficiency, and AFUE is the percentage of gas a furnace turns into heat. Higher is more efficient.

Since 2023, new split air conditioners under about 45,000 Btu/h sold in Virginia must meet at least 14.3 SEER2, and new heat pumps at least 14.3 SEER2 and 7.5 HSPF2. Higher-efficiency and variable-speed equipment also tends to control humidity better.

It depends on the equipment type and efficiency, the size of the home, the ductwork and how difficult the installation is, so we don’t quote a number without seeing the house.

You can get a free on-site visit and a written replacement estimate. Financing is available through Wisetack for qualifying projects, subject to lender approval and terms.

Programs change often, so check before you buy. The federal 25C energy-efficient home improvement credit ended for equipment installed after December 31, 2025, and utility programs come and go.

Dominion Energy Virginia runs home energy-efficiency programs; check its current offerings, and ask a tax professional about anything tax-related.

Leave the house right away. Don’t flip light switches, use the thermostat, start a car in an attached garage or use your phone inside. Once you’re outside and away from the house, call Washington Gas or 911.

Don’t go back in until the gas company or fire department says it’s safe. Then call us to inspect the furnace or appliance.

Get everyone out of the house into fresh air and call 911. Don’t try to find the source yourself.

After responders clear the home, have the furnace, water heater and other fuel-burning appliances inspected before using them again. Every home with gas appliances or an attached garage should have CO alarms on each level.

Yes. Replacing a furnace, air conditioner or heat pump in Northern Virginia generally requires a mechanical permit (and often electrical or gas permits) from your local building department.

That’s the City of Alexandria, Arlington County, Fairfax County, the City of Fairfax or the City of Falls Church, depending on where the home is. A licensed contractor pulls the permit and the work is inspected.

Use the Virginia Department of Professional and Occupational Regulation (DPOR) license lookup. HVAC contractors are licensed by the Board for Contractors as Class A, B or C contractors with an HVAC specialty, and individual tradesmen hold journeyman or master HVAC licenses.

Integrity publishes its Virginia Class A contractor license (No. 2705191210) and Master HVAC license (No. 2710081728) so you can look them up.

A valid Virginia license, insurance, a load calculation before sizing, a written quote that lists equipment and scope, and someone who explains repair options before selling a replacement.

Read recent reviews, check manufacturer dealer listings, and be wary of pressure to decide on the spot. Professionalism and honesty should be the standard, not an upgrade.

No. Refrigerant handling legally requires EPA Section 608 certification, and refrigerant, gas piping, burners and high-voltage electrical work can injure you or damage the system.

Safe homeowner jobs are limited to changing filters, keeping the outdoor unit clear of leaves and plants, and checking thermostat settings and breakers.