Home Services Sustainability

Your CrewsAlready KnowThe Homes.We Teach ThemThe Future.

Sustain embeds alongside regional HVAC contractors, plumbers, and weatherization crews — auditing systems, unlocking rebate programs, and turning existing service calls into green upgrade revenue.

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340+Homes Certified

$4.2MRebates Captured

28%Avg. Energy Reduction

Sustainability consultant reviewing energy model on tablet at kitchen island with contractor, hard hat on counter

Marcus Webb, Senior Energy Auditor — on-site review, Phoenix, AZ

Live Audit

82 kWh

Daily baseline — before retrofit

Code Ready

IECC 2024

HVAC OptimizationInsulation EnvelopesWater Fixture AuditsMunicipal Retrofit ContractsRebate Program NavigationIECC 2024 ComplianceAppliance Load AnalysisEnergy Star CertificationWeatherization StrategyContractor Training

The Consultants

The humans
behind the audit.

Every partnership begins with a conversation. Here are the people you'd actually be working with — their credentials, their field time, and their track record.

Dr. Renata Osei, Principal Consultant, reviewing building plans at a desk

Building science consultant on-site inspection with contractor crew reviewing insulation installation

Field Work

Denver, CO · 16 yrs exp.

190+Homes Certified

$1.8MRebates Designed

Dr. Renata Osei

Principal Consultant, Building Science

"When the 2024 IECC dropped mandatory heat-pump provisions, I had already run the retrofit numbers for sixty contractor fleets. The crews who moved in the first ninety days captured 80% of the available municipal rebate pool."
On navigating the 2024 IECC heat-pump mandate

Renata spent eight years as a senior building scientist at the Rocky Mountain Institute before founding her own retrofit program that certified 190 homes in Colorado's weatherization pilot. She now leads Sustain's contractor training curriculum and municipal bid strategy.

BPI Building AnalystRESNET HERS RaterLEED AP BD+CDOE Home Energy Score Assessor

190+Homes Certified

$1.8MRebates Designed

31%Avg. Energy Reduction

Marcus Webb, Senior Energy Auditor, in business casual attire with confident posture

HVAC technician and energy auditor reviewing system diagnostics on tablet in mechanical room

Field Work

Phoenix, AZ · 12 yrs exp.

3Franchise Programs Built

$2.2KAvg. Upsell Per Call

Marcus Webb

Senior Energy Auditor & Contractor Relations

"HVAC contractors already have the relationship with the homeowner. What they're missing is the language — how to frame a heat pump upgrade as a monthly bill conversation, not a capital expense. We give their techs that script."
On converting service calls into green upgrade sales

Marcus ran field operations for a 140-truck HVAC franchise before pivoting to energy consulting. He's designed retrofit sales training programs adopted by three regional plumbing franchises and two weatherization co-ops, adding an average $2,200 in upsell revenue per service call.

NATE Certified TechnicianBPI Envelope ProfessionalEPA 608 CertifiedACCA Manual J Certified

3Franchise Programs Built

$2.2KAvg. Upsell Per Call

150+Techs Trained

Ready to meet the team in person?

A 30-minute scoping call is all it takes to know if we're a fit.

Measured Outcomes

Numbers that
close contracts.

Every figure below comes from active partner programs — auditable, verifiable, and available in our co-branded case study.

Across all certified retrofit projects completed 2022–2025

28%

Average Energy Reduction

Total rebate dollars unlocked for partner firms and their clients

$4.2M

Rebates Captured

ENERGY STAR, LEED, and DOE Zero Energy Ready certifications

340+

Homes Certified

City and county retrofit programs secured for partner contractors

Municipal Contracts Won

From first call to first certified audit with a new partner firm

3 Days

Average Contractor Onboard

Firms that complete a pilot program continue into full partnership

92%

Partner Retention Rate

We don't sell sustainability as a concept. We install it as a revenue line — inside your existing service model, your existing relationships, your existing trucks.

Case study preview showing energy audit report and retrofit results for a regional HVAC contractor partnership

Co-Branded Case Study

How SunState HVAC Added $340K in Green Upgrade Revenue in 8 Months

127

Homes Audited

$2.1M

Rebates Filed

34%

Avg. Energy Savings

Free Download

See exactly how a partnership works — in the field.

This 14-page co-branded case study walks through the full SunState engagement: discovery audit, crew training, rebate application, and first-year revenue outcomes. Enter your business email and we'll send it directly.