Frequently Asked Questions

Most HVAC systems in Richmond last 15-20 years with proper maintenance. Heat pumps and air conditioners typically last 15-18 years, while furnaces can last 20-25 years. However, lifespan depends on several factors — installation quality, maintenance history, how hard the system works, and whether it was properly sized for your home. If your system is 12-15+ years old and needing frequent repairs, it's worth considering replacement before it fails completely.

A diagnostic ($149) is for a system that isn't heating or cooling — we find out why it stopped working and what it takes to fix it. A consultation ($199) is for a system that runs but isn't doing its job, or for a home considering replacement. Our HVAC Replacement Consultation tests your ductwork and calculates your home's actual load before we recommend equipment. Our HVAC Home Consultation & Action Plan investigates comfort problems like humidity, odors, uneven temperatures, and airflow, and ends with a prioritized Action Plan.

A free estimate usually means someone looks at the equipment you already have and prices a replacement of the same size. We don't work that way. Before we recommend anything, we test your duct system, measure airflow and static pressure, and calculate what your home actually needs. That takes time, specialized equipment, and expertise, so it's a professional service, not a sales visit. You're not paying for a price. You're paying for the work it takes to find out what your home needs.

High energy bills in Richmond homes usually come from one of several issues: an aging or inefficient HVAC system, leaky ductwork losing conditioned air, poor insulation or air sealing, a system that's improperly sized for your home, or deferred maintenance causing your equipment to work harder than it should. The only way to know for sure is to test and measure. Our energy audits and diagnostic services can identify exactly where you're losing energy and what improvements will make the biggest impact.

The right size depends on your home's actual heating and cooling load — not just square footage. A proper load calculation (called Manual J) factors in insulation levels, window size and orientation, ductwork, ceiling heights, and more. Oversized systems cycle on and off too frequently, wasting energy and failing to control humidity. Undersized systems run constantly and can't keep up on extreme days. DNA performs load calculations to ensure every system we install is sized correctly for your specific home.

Uneven temperatures are one of the most common comfort complaints in Richmond homes. The cause is usually one of these: undersized or poorly designed ductwork, duct leaks losing air before it reaches certain rooms, inadequate insulation in some areas, a system that wasn't sized or balanced properly, or rooms with large windows or poor air sealing. Diagnosing the real cause requires testing — measuring airflow, checking duct leakage, and evaluating how your system performs. We can help identify what's causing your hot and cold spots.

A heat pump is an all-electric system that provides both heating and cooling. It works like an air conditioner in summer, then reverses the process in winter to bring heat into your home. Modern heat pumps are highly efficient — even in cold weather — and eliminate the need for a gas furnace. For most Richmond homeowners, heat pumps are an excellent choice. They're safer (no combustion or carbon monoxide risk), more efficient, and simpler to maintain. DNA specializes in heat pump installations and can help you determine if one is right for your home.

For standard 1" filters, check monthly and replace every 1-3 months depending on usage, pets, and dust levels. Homes with pets or allergies may need more frequent changes. If you have a whole-home media filter (4" or thicker), those typically last 6-12 months. A dirty filter restricts airflow, makes your system work harder, increases energy bills, and can lead to equipment damage. It's one of the simplest things you can do to protect your system.

SEER stands for Seasonal Energy Efficiency Ratio — it measures how efficiently your air conditioner or heat pump cools your home. Higher SEER means lower energy costs. As of 2023, new systems use SEER2, which is measured under more realistic conditions. In Virginia, the minimum efficiency for new systems is 14.3 SEER2 for heat pumps and 13.4 SEER2 for air conditioners. Higher-efficiency models (16-20+ SEER2) cost more upfront but save money over time. We help Richmond homeowners find the right balance of efficiency and budget for their situation.

Most heat pump or central AC installations in Richmond are completed in one day. More complex projects — like full system replacements with ductwork modifications, or installations requiring electrical upgrades — may take two days. We'll give you a clear timeline during your consultation so you know what to expect.

Not always, but often yes — especially in older Richmond homes. Your ductwork is responsible for delivering conditioned air throughout your home. If it's leaky, undersized, or poorly designed, even a brand-new high-efficiency system won't perform well. We test duct leakage and evaluate your existing ductwork before recommending replacement. If your ducts are in good condition and properly sized, we can work with them. If they're losing 20-30% of your air, new ductwork will dramatically improve comfort and efficiency.

New systems come with manufacturer warranties covering parts — typically 5-10 years depending on the equipment and whether it's registered. DNA also offers extended labor warranties up to 10 years on full system replacements, so you're not paying for service calls if something goes wrong. For duct systems we install, we provide a Lifetime Craftsmanship Warranty — we stand behind our work for as long as you own your home.

The cheapest quote often costs more in the long run. Low-price contractors typically skip load calculations, install equipment based on rules of thumb, don't test ductwork, and rush through installations. The result is a system that's improperly sized, doesn't deliver the efficiency you paid for, and may fail sooner. High-performance contractors like DNA test, measure, and verify. We size systems correctly, address ductwork issues, and make sure everything performs as designed. You get better comfort, lower energy bills, and equipment that lasts longer.