Which Tests Does Keystone Provide?

Keystone provides independent blower door and duct leakage tests for new residential construction, along with measured results and formal documentation for the local construction office.



 
Yes. New Jersey’s statewide construction code requires covered new homes to meet both air-leakage and duct-leakage limits.
 
These are state requirements, not optional township policies. If a local construction office fails to request the tests or reports, the requirement does not disappear. Permit dates, approved plans, and compliance paths may affect individual projects.

View New Jersey’s official testing requirements and code references.

What could happen if a homebuyer later discovers that required testing was not completed?
 
A homebuyer could review the municipal permit file and ask the local construction official to investigate. Missing testing may also surface during a warranty claim, resale, or dispute involving comfort, air leakage, energy use, or HVAC performance.
 
Depending on the circumstances, a builder could be asked to arrange testing, complete corrective work, pay for retesting, respond to code-enforcement action, or defend a claim. Missing documentation does not by itself prove that the home would fail or that the buyer suffered damages.

Review New Jersey DCA guidance on warranty claims and court remedies.
 
Does every residential project require both tests?

Covered new residential construction in New Jersey requires both a blower door and duct leakage test. Existing homes and additions may follow different requirements.
 
In Pennsylvania, a duct leakage test may not be required when all ducts and air handlers are entirely inside the building thermal envelope. Permit dates, approved plans, compliance paths, and the enforcing agency can affect individual projects.
 
Where does Keystone provide testing?

Keystone serves residential construction projects across New Jersey and eastern Pennsylvania. Contact us before booking if your project is outside our standard service area.

Who does Keystone work with?

Keystone works with builders, HVAC contractors, developers, general contractors, construction managers, and homeowners who need independent testing and documentation for residential projects.

When should testing be scheduled?
Blower door testing is generally completed near the end of construction, after the building enclosure is substantially finished.
 
Duct leakage testing may be completed during rough-in or after the HVAC system is fully installed. Scheduling early allows time for corrections and retesting before the final inspection or project deadline.
 
What should be ready before a blower door test?
 
Exterior doors and windows should be installed, the building enclosure should be substantially complete, and major penetrations should be sealed. Electrical power must be available, and the tester must have safe access to the entire conditioned area, including attics, crawlspaces, and mechanical rooms.
 
What should be ready before a duct leakage test?
 
The ductwork being tested should be installed, sealed, and accessible. Supply and return openings must be available for temporary sealing.
 
For post-construction testing, the air handler and complete duct system should be installed. If the test is being scheduled during rough-in before the air handler is installed, tell Keystone in advance so the correct testing scope can be confirmed.
 
Current plans, conditioned floor area, and the number of HVAC systems should be available when possible.
 
When will I receive the results and certificate?

Keystone sends the invoice and measured results after the appointment. Once payment is received, the formal test certificate is generally issued the same day.

What happens if the project does not pass?

Keystone provides the measured result and explains any observable conditions identified during testing. The responsible contractor can then complete the necessary corrections.
 
A retest may be required to verify that the project meets the applicable limit and to issue passing documentation. Keystone does not perform air sealing, duct sealing, HVAC installation, insulation, or repair work.
 
Can Keystone test a home with multiple HVAC systems?

Yes. Each required HVAC system can be tested separately. Include the number of systems when booking so Keystone can confirm the testing scope, appointment length, and pricing.

What types of residential projects can Keystone test?

Keystone tests single-family homes, townhomes, rowhomes, duplexes, and selected multifamily residential projects. Submit the project details so we can confirm the testing requirements and scope.

How Do I Schedule a Test?
 
Complete the online booking form or call (877) 517-0004. Keystone will review the submitted information and confirm the appointment.
 
Be prepared to provide the project address, requested service, building type, conditioned floor area, number of HVAC systems, construction status, preferred date, and site-access information.

How much does testing cost?
 
Pricing depends on the requested test, number of HVAC systems, project location, and any additional testing requirements. Current single-test pricing is listed on our home page.
 
Builders and contractors with recurring testing volume can ask about preferred pricing through the Keystone Builder Partner Program.

Does Keystone perform NEMA, IP, or industrial enclosure testing?

No. Keystone specializes in residential blower door and duct leakage testing. We do not perform NEMA, IP, IEC 60529, environmental-chamber, or industrial-product enclosure testing.