Questions, answered

Both. Most of our work is for builders, general contractors, and architects who need stamped mechanical design, Title 24 compliance, and commissioning. We also work directly with homeowners, especially for HERS testing and energy questions on custom homes.

Our field service covers the Tahoe–Truckee–Reno and Eastern Sierra corridor. Engineering, Title 24, and commissioning documentation is delivered across all eight states we hold PE licenses in: California, Nevada, Hawaii, Oregon, Idaho, Utah, Wyoming, and Colorado.

Every engagement is scoped and quoted to the project. There's no flat price list, because a CF1R revision and a full commissioning program are very different efforts. Tell us the project and stage and we'll give you a clear quote.

A HERS rating is a California-required, field-verified check of specific energy measures (like duct leakage and insulation quality) performed by a certified Rater who files the forms your inspector needs. Email hers@benderengineering.com and we'll get you scheduled.

Yes, that single-source path is the point. We can handle mechanical and plumbing design, energy compliance, HERS verification, and commissioning under one roof, so the engineering stays coordinated from first calculation to final sign-off.

Yes. Bender Engineering is licensed, bonded, and insured, with professional mechanical engineers licensed in eight western states and CalCERTS-certified HERS Raters on staff. PE license numbers are available on request.

Yes. Title 24 is core work for us, and Truckee, Tahoe City, Kings Beach, and the wider Tahoe basin are home turf. We model the CF1R, coordinate any required HERS measures, and revise certificates that didn't pass. Our Truckee headquarters sits minutes from most local permit offices.

Yes. Our CalCERTS-certified HERS Raters work across the Lake Tahoe and Truckee corridor: Tahoe City, Kings Beach, Incline Village, and Northstar included. We schedule rough-in and final verification around your trades so a failed measure never stalls inspection. Email hers@benderengineering.com to book.

Yes. Our Sparks office anchors commissioning work across Reno, Sparks, Carson City, and Northern Nevada, and we commission projects nationwide. We handle new-construction, retro-, and re-commissioning, including LEED Fundamental and Enhanced commissioning, verifying systems against the Owner's Project Requirements.

In California, most remodels, additions, and all new construction require a Title 24 energy compliance report before a permit is issued. We'll confirm scope and model what your project needs.

Yes. Revising and re-modeling existing certificates of compliance is one of our most common requests. Send us what you have and we'll find the efficient path to a passing model.

Yes, it's core work, and the Tahoe–Truckee region is home base. From our Truckee headquarters we model CF1R certificates for Truckee, Tahoe City, Kings Beach, Incline Village, and the surrounding basin, then coordinate any required HERS measures so your permit clears.

Yes. For the seven non-California states we're licensed in, we prepare ResCheck and ComCheck documentation under the IECC, with the accompanying ACCA Manual J, D, and S calculations. The deliverable is the energy-compliance package your jurisdiction requires.

The Title 24 report is the energy model and CF1R certificate that proves your design meets code before a permit is issued. A HERS test is the field verification done during construction to confirm specific measures, like duct leakage, were actually installed. We do both, under one roof.

As early as possible, ideally during design. Modeling the envelope, HVAC, and hot water before plans are final lets us flag what will and won't pass, so you avoid expensive redesigns at permit. We're glad to review a project at any stage, though.

Common measures include duct leakage, blower-door envelope leakage, insulation quality (QII), refrigerant charge, airflow, and indoor air quality, whichever your energy model calls out.

Email hers@benderengineering.com or use the Schedule a HERS Test button. Tell us the project address and stage and we'll coordinate timing with your build schedule.

Yes. The Lake Tahoe and Truckee corridor is our backyard. Our CalCERTS Raters cover Truckee, Tahoe City, Kings Beach, Incline Village, Northstar, and the basin, plus Reno and Sparks from our second office. We've rated homes here for more than 20 years.

Most projects need verification at two points: a rough-in test before walls close up (for duct leakage and insulation quality), and a final test near completion. We schedule around your trades so testing never becomes the thing holding up your inspection.

We tell you exactly what failed and why, then work with your trades on the fix and re-test. Because we also handle Title 24 modeling in-house, we can adjust the compliance approach if a measure can't be met as designed, without restarting the paperwork.

That's Marc Bender, on our team, recognized as the youngest certified HERS Rater in the United States. He completes energy-compliance testing and CF2R/CF3R documentation alongside our other CalCERTS Raters.

Re-commissioning re-verifies a building that was commissioned before (recommended every 3–5 years). Retro-commissioning commissions an existing building that never went through the process.

Yes. Our Sparks office anchors commissioning across Reno, Sparks, Carson City, and Northern Nevada, and we commission projects nationwide. The work verifies that HVAC, plumbing, and lighting systems perform as designed against the Owner's Project Requirements.

Yes. A LEED Accredited Professional on our team manages both Fundamental and Enhanced commissioning toward whatever certification level you're targeting, coordinating the documentation and verification LEED requires from design through post-construction.

Systems that work the way they were designed to, which means better comfort, lower operating cost, fewer warranty surprises, and longer equipment life. We document everything, so the building's performance is verified and on record, not assumed.

About every three to five years for most commercial buildings. Settings drift, equipment ages, and use changes over time. Re-commissioning re-tunes the systems and catches problems before they show up as high energy bills or comfort complaints.

Both, from custom mountain homes to commercial projects over 500,000 square feet. We size and document mechanical and plumbing systems for any scale.

Sierra buildings face deep cold, big snow loads, and tight, well-sealed envelopes. That changes how you handle ventilation, radiant heat, snow-melt, and humidity. We design underfloor ventilation and radiant systems tuned to how Tahoe–Truckee homes actually perform through winter.

They're the industry-standard calculations for residential HVAC design. Manual J sizes heating and cooling loads room by room, Manual D lays out the duct system, and Manual S selects the right equipment. We run all three so systems are sized correctly, not by rule of thumb.

Yes. We coordinate with your architectural and structural plans during design and stay with the project through final inspection, answering field questions and resolving conflicts as they come up. It isn't a drawing set thrown over the wall.

Yes. Our professional engineers are licensed in eight western states (California, Nevada, Hawaii, Oregon, Idaho, Utah, Wyoming, and Colorado), so we can deliver PE-stamped mechanical and plumbing design across all of them.

It's a whole-building analysis that finds where a building loses energy, measures how much, and ranks the fixes by payback. The result is a clear, prioritized plan: what to improve first, what it costs, and what it saves.

A HERS test verifies specific code measures on new or renovated homes for compliance. An energy audit is broader and diagnostic: it looks at an existing building as a whole to find waste and plan retrofits, whether or not any code requires it.

Yes. That's exactly what an audit is for. We locate where the building leaks energy (envelope, ducts, equipment, controls) and quantify each loss, and tell you which fixes return the most for the money so you're not guessing.

Both. Our qualified auditors analyze residential and commercial buildings across the Tahoe–Truckee–Reno region and beyond, with 20-plus years guiding owners through the findings and the retrofit decisions that follow.

Yes. We model the ROI and payback for the recommended improvements so you can fund the work in the right order, and we can document current usage as a baseline before an upgrade, which is useful for rebates or financing.

For most new residential construction, yes. California's energy code requires a solar electric system. But heavily shaded lots can qualify for a reduced requirement or an exemption, which is what a solar shade analysis is for.

It comes down to solar access. Using state-approved Helioscope software, we model how much usable sun your roof actually gets after trees and terrain. If shading is heavy enough, the analysis documents a reduced requirement or full exemption for your permit.

Maybe not. Mountain lots in the Tahoe–Truckee area are often shaded by dense forest, which is exactly the case an exemption analysis is built to prove. We run the shade model and document whether your project qualifies for relief from the solar requirement.

Yes. We run exemption analyses for both single-family and multi-family projects, model the required solar installation under state rules, and advise the most cost-efficient path to develop the project.

Early, before you finalize the roof. Knowing whether a project carries a solar requirement or qualifies for an exemption up front lets you design the roof and budget accordingly, instead of reworking plans late in permitting.