Questions? We've got answers.

Yes. Emergency service is available 24 hours a day, 7 days a week, including holidays. Call (703) 555-0142 any time.

No heat in cold weather or no cooling in extreme heat when someone vulnerable is home, water leaking from the unit, or a gas, carbon monoxide, smoke or burning situation (after you're safely outside).

The after-hours, weekend or holiday emergency service call is $189, applied toward the repair if you approve it. Comfort Club members pay the standard $99.

The on-call technician will call you back to confirm a time. We don't promise a specific arrival time on the phone.

Leave the house right away with everyone, including pets. Don't flip any switches. Once you're outside, call 911 or your gas company's emergency line. Then call us.

Our AI assistant, Sam, answers after hours. Sam takes your details, gives safety instructions, and connects real emergencies to our on-call technician.

Monday to Friday 7:30 AM to 5:30 PM, Saturday 8 AM to 12 PM. Closed Sunday for routine service. Emergency service is 24/7.

Messages left after hours are returned on the next day the office is open. Saturday afternoon and Sunday calls are returned Monday morning.

Yes, two-hour windows, and your technician calls when on the way.

You can request service through the form on our Contact page or the chat on this site. The office confirms your time during business hours.

Yes, an adult 18 or older needs to be home for the whole visit.

Call the office with at least 2 hours' notice. There's no fee to reschedule.

Yes, Saturday 8 AM to noon for routine appointments, and emergency service any time.

$99 during business hours, waived if you approve the repair. After-hours, weekend and holiday emergency calls are $189.

Not for repairs, because every system is different. Your technician gives you an exact price on site before doing any work.

$119 for a furnace or heat pump tune-up, and $119 for an air conditioner tune-up.

Complete systems typically start around $7,500, depending on your home and equipment. Estimates are free.

Comfort Club members get 15% off repairs. We also offer sample promotions from time to time; ask the office.

Visa, Mastercard, American Express, Discover, checks and cash. Payment is due when the work is completed.

Yes, on new systems with approved credit, including 0% APR for 18 months on qualifying systems (sample offer).

Our maintenance plan: $19.95 a month or $219 a year for two tune-ups a year, priority scheduling, no after-hours fee, and 15% off repairs. No contract; cancel anytime.

Yes, anytime. There's no contract.

$19.95 a month for the first system and $9.95 a month for each additional system in the same home.

Loudoun, Fairfax and Prince William counties, including Ashburn, Leesburg, Sterling, Purcellville, Herndon, Reston, Chantilly, Centreville, Fairfax, Vienna, McLean, Manassas, Gainesville, Haymarket and Bristow.

No. We don't serve Arlington, Alexandria, Washington DC, Maryland, or areas south of Woodbridge.

No, residential only.

No, heating and air conditioning only.

We don't offer standalone duct cleaning, but we repair, seal and replace ductwork and can recommend a duct cleaning company.

All major brands, including Carrier, Trane, Lennox, Rheem, Goodman, American Standard, Bryant, York, Daikin and Mitsubishi Electric.

Yes, single-zone and multi-zone systems, starting around $4,200 for a single zone, installed.

Repairs: 1 year parts and labor. New installations: the manufacturer's warranty plus our 2-year labor warranty.

Yes. All technicians are licensed, insured, background-checked and drug-tested.

Since 2009. We're family-owned, based in Chantilly.

Yes. See our Careers page, or email the office or call during business hours.

Only if there's no gas smell, burning smell or CO alarm: make sure the thermostat is set to Heat and above room temperature with fresh batteries, check the furnace breaker, make sure the furnace power switch is on, and replace a very dirty filter. If none of that works, call us.

Turn the system off and set the fan to On to melt the ice, check for a dirty filter, then call us. Running it frozen can damage the compressor.

If it's safe, turn the system off at the thermostat and put towels or a bucket under the leak, then call us. An active leak is treated as an emergency.

If the furnace is over 15 years old and the repair costs more than about a third of a new system, replacement usually makes more sense. Your technician will give you both prices so you can decide.

Most replacements are done in one day.

Yes. A short burst of steam during a defrost cycle is normal. A unit that stays covered in ice for hours is not; call us.

Federal tax credits and utility rebates are sometimes available for high-efficiency heat pumps. The office can tell you what applies when you get your estimate.

Usually not. If the system is running but not keeping up, we'll take your information and schedule you as soon as possible. It's an emergency if there's no cooling in extreme heat with someone vulnerable in the home.

It depends on your home's square footage, insulation, windows and layout. We do a proper load calculation during the free estimate rather than guessing.

A single-zone installation is usually done in one day.

Standard 1-inch filters: every 1–3 months. Thicker 4–5 inch media filters: every 6–12 months. Change more often with pets or allergies.

Replace the batteries if it has them, then check that the breaker for your furnace or air handler hasn't tripped and that the furnace power switch is on. If it's still blank, we'll take a look.

We don't offer standalone duct cleaning. We repair, seal and replace ductwork, and the office can recommend a duct cleaning company.