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This guidance is U.S.-focused. Building codes, climate zones, utility rates, incentives, certification rules, and testing requirements vary by location. Treat the questions below as a briefing for your project team, then confirm requirements with the authority having jurisdiction and the applicable program administrator.
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Begin with a written performance brief
Give the architect a short brief before schematic design is complete. It should describe how you expect the home to feel and operate, not just how it should look. Include comfort priorities, rooms that must remain quiet, likely occupancy, cooking habits, hot-water demand, tolerance for maintenance, backup-power goals, and any health or air-quality concerns. Those priorities influence window area, shading, equipment capacity, ventilation, and electrical planning.
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A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11Ask the architect to turn that brief into measurable objectives. Examples include an energy-use target from a project-specific model, an airtightness target verified by a blower-door test, documented heating and cooling loads, indoor-air-quality requirements, and commissioning steps. A target is useful only when the team identifies who measures it, when it is measured, and what corrective action follows a failed result.
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Questions to put in the first meeting
- What energy and comfort outcomes should this home achieve, and how will each outcome be measured?
- Which assumptions about occupancy, thermostat settings, appliance use, utility rates, and weather will your model use?
- Which design options will you compare before we select the final orientation, windows, insulation, and equipment?
- What drawings, specifications, reports, inspections, and tests will document the target?
- Who owns each task: architect, energy modeler, HVAC designer, builder, rater, testing contractor, or commissioning professional?
How will the design respond to this site and climate?
Ask for a site-specific explanation rather than a generic “energy-efficient” plan. The U.S. Department of Energy’s Building Science Education guidance describes performance design as a whole-house systems approach and recommends comparing design options during planning. Ask how the lot’s latitude, prevailing winds, terrain, neighboring buildings, trees, summer sun, winter sun, and local weather data affect the design.
Orientation and solar exposure
Have the architect show how the main glazing, outdoor spaces, and overhangs respond to the sun at different times of year. A favorable orientation may improve useful winter solar gain and reduce unwanted summer gain, but the result depends on climate, glass area, shading, and interior loads. Request a comparison of at least two reasonable orientations or massing strategies, with the same occupancy and operating assumptions in each model.
Shading and landscape decisions
Ask which shading comes from the building itself and which depends on deciduous trees, screens, blinds, or neighboring property. Landscaping changes over time, so do not count a mature tree as the only defense against overheating unless the design also works before that tree reaches full size. Clarify maintenance, wildfire exposure where relevant, storm durability, and whether exterior shades can be repaired or replaced.
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Flood risk, wildfire smoke, high humidity, extreme cold, poor soil, salt air, noise, and limited utility capacity can change the best solution. Ask the architect to identify these constraints and explain their effect on enclosure assemblies, filtration, mechanical-room space, equipment location, and resilience. The goal is not a single “best” style but a documented choice that fits this site and your household.
Will you model energy performance before construction?
Request preliminary design-phase energy modeling before major choices are locked. ENERGY STAR’s U.S. single-family certification process calls for preliminary modeling, with regional variations in requirements. Even when certification is not planned, modeling can reveal interactions that intuition misses: a larger window package may increase heating benefit in one orientation while sharply increasing cooling demand in another; thicker insulation may have less value than fixing thermal bridges or reducing air leakage.
Ask who models and what is included
Identify the person or firm preparing the model and their role relative to the architect and builder. Ask which software or calculation method will be used, what climate file represents your location, and whether the model covers space conditioning, ventilation, water heating, lighting, appliances, and renewable generation. Ask for a plain-language assumptions sheet that records floor area, schedules, thermostat settings, window properties, infiltration, equipment efficiencies, and hot-water use.
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Require an alternatives report
Do not accept one modeled result without a baseline or alternatives. Ask for a side-by-side comparison of practical options such as window orientation and glass percentage, insulation levels, air-sealing strategies, heat-pump or combustion equipment, duct location, and water-heating systems. Use consistent assumptions so that differences reflect the design choices rather than changed occupancy or weather inputs.
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What envelope targets will appear in the drawings?
The enclosure controls heat, air, and moisture movement. Ask for a continuous air-barrier strategy, insulation locations and levels, window and door specifications, thermal-bridge details, and a plan for transitions at the foundation, walls, roof, balconies, attached garages, and other penetrations. Drawings should identify the air-control layer and show how it remains continuous around ducts, wiring, plumbing, recessed fixtures, and structural connections.
Airtightness
Ask for a numerical airtightness target and the test method. A blower-door test measures how much air leaks through the enclosure under a specified pressure. The target should state the applicable metric and units, who performs the test, and at which construction stages. A pre-drywall test gives the builder a chance to find and seal leaks before finishes hide them; a final test confirms the completed enclosure.
Insulation and thermal bridges
Ask whether the insulation strategy is cavity-only, continuous exterior insulation, a hybrid, or another assembly, and how the design manages compression, gaps, wind washing, and moisture. Request enlarged details for slab edges, window perimeters, roof-to-wall transitions, and structural penetrations. A high nominal R-value does not describe whole-wall performance when framing and thermal bridges are left unaddressed.
Windows and doors
Request orientation-specific window decisions, not a single specification applied everywhere. Ask for U-factor, solar heat-gain coefficient, visible transmittance, air leakage, frame material, glazing configuration, and installation details. Confirm that flashing, sill pans, tapes, and sealants are compatible with the wall assembly and that operable windows do not undermine the ventilation or pressure strategy.
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Inspection plan
Ask who verifies air-barrier continuity and insulation installation before drywall. ENERGY STAR materials describe enclosure inspections and field verification; the exact checklist depends on the certification path and location. Put hold points in the construction schedule so concealed work is reviewed before it becomes expensive to correct.
How will heating and cooling loads determine equipment and ducts?
Ask for documented room-by-room heating and cooling load calculations rather than equipment selected from floor area or a rule of thumb. The calculation should reflect the final orientation, windows, insulation, airtightness target, internal gains, design temperatures, and ventilation air. Request the report and ask the HVAC designer to explain the peak loads, shoulder-season behavior, and any spaces with unusual requirements.
Equipment selection
Ask how the selected equipment capacity matches the calculated loads at the outdoor temperatures that matter for your climate. Oversized equipment can cycle frequently, reduce dehumidification, and create uneven temperatures; undersized equipment may struggle during design extremes. For heat pumps, ask about capacity and efficiency at relevant low temperatures, supplemental heat, defrost behavior, controls, and electrical service requirements. For combustion equipment, ask how combustion air, venting, and depressurization risks are addressed.
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Ducts and air distribution
Request a duct design showing sizes, lengths, pressure losses, insulation, sealing, and locations. Ducts inside conditioned space generally reduce losses, but the final choice depends on architecture and construction. Ask how supplies and returns will balance room pressures, how filters are sized, and how access for cleaning and service is provided.
Reports and coordination
ENERGY STAR identifies HVAC designer tasks that include load calculations, equipment selection, duct design where applicable, and ventilation design, with standardized reports that vary by program track. Ask the team to coordinate those reports with the architectural drawings so a mechanical chase, refrigerant line, condensate drain, or filter cabinet is not improvised after framing.
How will ventilation and indoor air quality work in a tight home?
Airtight construction reduces uncontrolled leakage; it does not eliminate the need for outdoor-air exchange. Ask which whole-house ventilation approach is planned and how it will operate with the enclosure, exhaust fans, combustion appliances, and local climate. DOE Building Science Education describes exhaust, supply, balanced, and energy-recovery strategies; none is universally best for every project.
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Exhaust ventilation
An exhaust system uses fans to remove indoor air and draws replacement air through intentional or incidental openings. Ask how incoming air will be tempered and filtered, and whether the system could depressurize the house enough to affect combustion appliances or draw pollutants from garages and crawlspaces.
Supply ventilation
A supply system brings outdoor air in through a fan and relies on passive exhaust paths. Ask where the intake is located, how it avoids vehicle exhaust and other contaminants, how filtration works, and how the system handles humid or very cold outdoor air.
Balanced ventilation
A balanced system supplies and exhausts approximately equal airflows through dedicated ducts. Ask how the designer will balance the system, where the grilles and ducts fit, and how noise and maintenance are controlled.
Energy-recovery ventilation
An energy-recovery ventilator transfers some heat and, in appropriate equipment, moisture between outgoing and incoming air. Ask whether the selected unit is suited to your climate, what its tested airflow and recovery performance are, how frost is managed, and how filters and cores are serviced.
Kitchen and bath exhaust
Whole-house ventilation does not replace source control. Ask for dedicated kitchen and bathroom exhaust, discharge locations, makeup-air provisions where required, run times, controls, and commissioning measurements. Confirm that the ventilation plan remains effective when the range hood, clothes dryer, fireplaces, and other exhaust devices operate.
Who will inspect and test the work?
Put the verification chain in the contract and schedule. Ask who conducts the pre-drywall review, final enclosure review, blower-door test, duct-leakage test where applicable, ventilation balancing, and final documentation. ENERGY STAR’s process describes third-party design review, inspections, diagnostic tests, and final review by an EPA-recognized organization, but a project does not automatically receive those services unless the team enrolls in the relevant path.
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Define stages and acceptance targets
- Design review: Check drawings, specifications, energy model, HVAC reports, and program prerequisites before bidding or permit submission.
- Pre-drywall inspection: Verify air-barrier continuity, insulation installation, window and door interfaces, duct sealing, and concealed penetrations.
- Diagnostic testing: Perform the specified blower-door and duct tests while corrective work is still practical.
- Final inspection: Confirm equipment, controls, filters, ventilation components, labeling, and accessible service clearances.
- Closeout: Deliver test reports, model files or assumptions, certificates, manuals, warranties, and a list of unresolved items with responsible parties and deadlines.
Ask what happens when a test fails
Require a written correction process. It should state who pays for follow-up testing, how leaks or duct defects are repaired, whether the model is rerun after a material change, and who signs off on the final result. A target without a remedy is only an aspiration.
Which performance program or certification applies?
If the team proposes ENERGY STAR certification or the DOE Efficient New Homes program, ask for the current version, mandatory checklists, modeling rules, rater or verifier qualifications, and project deadlines. DOE describes Efficient New Homes as a voluntary program and identifies it as the successor to DOE Zero Energy Ready Home. Program pages and tax-credit information can change, so confirm current IRS and Treasury terms and the home’s acquisition and certification dates before relying on an incentive.
Certification is separate from local code compliance. Ask the architect to list the applicable state and local energy codes, amendments, permit requirements, utility rules, and any program conditions in your jurisdiction. Do not assume that a national label substitutes for a permit approval or that a voluntary program is required for every new home.
What will modeling and verification cost?
Request a scoped fee, not a vague allowance. Separate design-phase energy modeling, option studies, HVAC calculations, third-party rating, pre-drywall and final inspections, blower-door and duct testing, ventilation balancing, certification administration, and follow-up testing. Ask which costs are fixed, which depend on floor area or testing outcomes, and what is excluded.
The official materials cited here do not establish a universal project price or payback period. A credible estimate must reflect your location, size, complexity, certification choice, construction schedule, and the number of design iterations. Ask for the modeled annual energy result alongside first cost, comfort, indoor air quality, durability, maintenance, aesthetics, and resilience rather than judging an option by payback alone.
How to compare design alternatives fairly
Use one comparison sheet for every option. Keep weather data, occupancy, thermostat schedules, appliance assumptions, and utility-rate assumptions consistent. Record both modeled results and practical consequences.
| Decision area | What to compare | Questions to ask |
|---|---|---|
| Site and massing | Orientation, compactness, glazing distribution, shading | How do annual energy, summer comfort, daylight, views, and future landscaping change? |
| Enclosure | Air barrier, insulation layout, thermal bridges, moisture control | What are the modeled gains, constructability risks, inspection points, and repair implications? |
| Windows | U-factor, solar heat-gain coefficient, visible transmittance, size | Will the choice reduce heating or cooling demand without creating glare or overheating? |
| HVAC | Capacity, efficiency, distribution, controls, fuel, service access | Does equipment match room loads, and how will it perform at design extremes? |
| Ventilation | Exhaust, supply, balanced, or energy-recovery approach | How are filtration, humidity, noise, frost, pressure, and maintenance handled? |
| Water heating | System type, location, distribution length, demand pattern | What are standby losses, recovery limits, electrical or fuel needs, and service requirements? |
DOE’s whole-building performance framework considers energy alongside durability, comfort, indoor air quality, safety, security, cost, aesthetics, and resilience. Ask the team to show those trade-offs explicitly. A lower modeled energy number may not be the best choice if it creates moisture risk, unacceptable noise, difficult maintenance, or poor resilience.
Use this checklist before design decisions are locked
- Written performance goals with metrics, units, and acceptance criteria.
- Site and climate analysis covering orientation, shading, weather, hazards, and household priorities.
- Preliminary model with documented assumptions and at least one comparable alternative.
- Envelope drawings showing air-barrier continuity, insulation, windows, transitions, and penetrations.
- Room-by-room load calculations and an HVAC design report coordinated with the plans.
- Ventilation design covering whole-house airflow, source exhaust, filtration, controls, and testing.
- Named inspectors, testers, raters, and reviewers with dates tied to construction stages.
- Blower-door, duct, and ventilation acceptance targets plus a correction procedure.
- Program and code requirements confirmed for the project’s location and certification path.
- Itemized fees for modeling, inspections, tests, certification, and retesting.
Warning signs in an architect’s answer
Be cautious if the team promises a percentage savings without showing the project assumptions, selects equipment from square footage alone, treats a tight enclosure as complete without a ventilation design, cannot identify who will test the work, or presents certification as a substitute for local code compliance. Another warning sign is a model that never changes when orientation, glazing, insulation, or equipment changes; a useful model should help you see those effects.
The strongest proposal connects drawings to field verification. It states the target, shows the detail, names the responsible person, schedules the inspection, records the result, and provides a remedy when construction falls short. That process gives you a defensible basis for approving design choices before they become expensive to change.
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