Serving Wilmington, DE and surrounding areas
Approved
In business since 2000
Free estimates
Emergency services offered
"Workman was experiance in the type of boiler that I have and answered all of my questions.. I will hire this summer for air conditioning"
Serving Wilmington, DE and surrounding areas
Approved
In business since 1991
Free estimates
Emergency services offered
"Now, they are One Hour Heating & Air Conditioning. In spite of our area having a heat wave, they were able to come out in less than 2 hours of my call. Joe J. fixed the problem in less than an hour, and my A/C was back on. Great price, too."
Serving Wilmington, DE and surrounding areas
Approved
In business since 2010
Free estimates
Credit card accepted
"Hired them from their Elkton Maryland branch. They did excellent work. The office staff was very courteous and helpful. Great company. Had my furnace fixed expediently. Thanks, Aire!"
+86
Serving Wilmington, DE and surrounding areas
Approved
In business since 1992
Free estimates
Warranties offered
"AirServ installed central air conditioning system. We are very satisfied with the timeliness and professionalism of their work. They respected our property and left it in excellent condition. They went over and above their work plan. We expect to have a long relationship with them."
Serving Wilmington, DE and surrounding areas
Approved
In business since 1989
Free estimates
Emergency services offered
"Paul responded to my call on a Sunday morning to service our gas hot water heater, which had stopped working. He quickly found a slow leak that had put out the pilot. Then in under 3 hours, he replaced the old hot water heater with a new one and we were back in business."
Serving Wilmington, DE and surrounding areas
Approved (Corporate)
Super Service Award Winner
In business since 2018
Free estimates
Emergency services offered
"The service was wonderful. Very responsive and fast. Very pleasant and concerned with pleasing the customers. Ryan, the tech was very good. Excellent all around!"
Serving Wilmington, DE and surrounding areas
Approved
In business since 1989
Free estimates
Emergency services offered
"Had an appointment for annual maintenance checkup. The Horizon tech was ontime, neat and polite. He checked all the routine items and resolved all of my concerns. He made a couple of recommendations for cleaner air circulation. All services were performed on my maintenance contract for no charge. This is the second heatpump that I've purchased from Horizon."
+18
Serving Wilmington, DE and surrounding areas
Approved
In business since 2018
Free estimates
Emergency services offered
"I had Montrell install some gas pipe for a dryer hook up. He is an absolute professional. Above and beyond what I expected. He was so good, I asked for him by name the next time I needed plumbing done. He connected my fridge water line."
Serving Wilmington, DE and surrounding areas
Approved
Super Service Award Winner
In business since 2002
Free estimates
Emergency services offered
"Very well. Sunny's Services not only moved our new stand up freezer into our house, they removed the old one AND all the packing materials from the new one. They even advised us not to plug in the new one for a couple hours because they tipped it when they moved it. They were on time, courteous and the price was very reasonable."
+81
Serving Wilmington, DE and surrounding areas
Approved
In business since 1988
Credit card accepted
Customers say: Quick response
"Angel at Harris Plumbing, Heating, Air, & Electrical helped me with an issue with my HVAC. He was very professional, courteous and thorough. He did a great job explaining the issue to me and the work he did to resolve the issue. I would highly recommend Angel and Harris Plumbing, Heating, Air & Electrical."
+8
A standard blower door test takes between 30 minutes and one hour to complete. The process involves setting up specialized equipment in your doorway, running the fan to create pressure differences, and taking measurements throughout your home. Additional services like thermal imaging or detailed leak detection will extend this timeframe. The technician will also spend time explaining the results and making recommendations based on their findings.
Preparation involves turning off all combustion appliances, such as gas furnaces and water heaters, for safety. Secure all exterior doors and windows, but leave interior doors open to allow airflow throughout the house. Close fireplace dampers and cover any ashes to prevent them from being drawn into living spaces. Clear access to potential inspection areas like attics and crawlspaces, and inform everyone in the household about the test to prevent accidental door openings during the process.
Older homes often benefit most from blower door testing because they have more air leakage points than newer construction. The test can pinpoint specific areas where relatively inexpensive improvements will yield significant energy savings.
Many homeowners of vintage properties report noticeable reductions in drafts and more consistent indoor temperatures after addressing issues identified during testing. The potential utility savings often recover the testing cost within a reasonable timeframe.
New construction must meet increasingly stringent energy codes that specify maximum allowable air leakage rates. Meeting these standards requires careful attention to air sealing details during construction.
Success depends largely on properly installing air barriers, thoroughly sealing around penetrations, and quality control throughout the building process. While achieving code compliance is challenging, builders who implement systematic air sealing protocols succeed in meeting required standards.
It's best to schedule a follow-up test after completing all recommended air sealing and insulation work. This allows you to verify the effectiveness of your improvements as a complete package. Allow sufficient time for all sealing materials to cure properly—often a few weeks after completion. The verification test provides documentation of your home's improved performance and confirms you've addressed the issues identified in the initial assessment.
From average costs to expert advice, get all the answers you need to get your job done.
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