How to choose a heat pump installer in the DMV
A heat pump is only as good as the house it is sized for. The same equipment that runs quietly through a January cold snap in one Bethesda colonial can short-cycle and leave a damp basement in the house next door. The difference is almost never the brand. It is whether the installer measured the house, sealed it and sized the system before quoting a price.
That is why this directory tracks four things on every listing: whether the company installs heat pumps at all, whether it sizes with a load calculation, whether it does energy audits or air sealing, and whether it designs or seals ductwork. Each one shows only when the company says so in its own words. "Not enough info" means it did not say, so ask.
Measure, seal, size, install
Ask every installer for a Manual J load calculation with the quote. Manual J is the ACCA standard for working out how much heating and cooling each room needs. A quote sized by matching the old unit, or by square footage, is a guess. If the house is leaky, ask about a blower door test and air sealing first, because a tighter house needs a smaller heat pump. Then ask how the ducts will be checked. Leaky or undersized ducts rob a new system of the capacity you paid for.
Licensing across three jurisdictions
The DMV is three sets of rules. In Maryland, look up the company with the State Board of HVACR Contractors and, for home improvement work, the Maryland Home Improvement Commission. In Northern Virginia, use the Virginia Department of Professional and Occupational Regulation. In Washington DC, check with the Department of Licensing and Consumer Protection. Ask who pulls the permit. It should be the installer, not you.
Rebates follow your utility
Maryland homes go through EmPOWER Maryland programs run by BGE, Pepco, Delmarva Power, Potomac Edison and SMECO. DC homes go through the DC Sustainable Energy Utility. Northern Virginia homes on Dominion Energy can check its energy saving programs. Programs change, so ask each installer which ones they work with and get the answer in writing. The federal Energy Efficient Home Improvement Credit covered systems placed in service through 2025, according to the IRS, so do not count on it for an install today.
What to ask on the first call
- Will you run a room-by-room load calculation, and will I get the report?
- Do you test for air leakage, or work with someone who does?
- How will you check the existing ducts, and what happens if they are undersized?
- What backup heat will the system use on the coldest nights, and when will it switch on?
- Who pulls the permit, and which rebate programs do you file for?
Start with the city pages below or the installers who do load calculations, call two or three, and compare the answers along with the price.