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The tech on the roof shouldn't
have to climb down for answers.

Sunny knows EPA 608, the R-454B transition, equipment fault codes across every major brand, and service procedures -- hands-free, in any language.

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EPA 608 native
R-454B transition
All major brands
6+ languages
Refrigerant Quick Reference
Live in Sunny
R-22
Phased out Reclaim only
R-410A
Transitioning No new equip. 2025
R-454B
Current standard A2L — low GWP
R-32
Mini-splits A2L mildly flammable
R-134a
Auto A/C Active
Sunny: "R-454B is the replacement for R-410A in new residential equipment. It's an A2L refrigerant -- mildly flammable, so you need a detector on site for service work. Charge by weight, not sight glass."
EPA 608 coverageFull
RefrigerantsAll major
Fault code brandsCarrier, Trane, Lennox + more
6 languages6+
Live in under 5 minutes< 5 min
What Sunny knows

Everything an HVAC tech asks in the field.

EPA regulations, refrigerant handling, equipment diagnostics, combustion analysis, load calculation basics -- all hands-free, all in the language your tech speaks.

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EPA Section 608

Certification requirements, refrigerant handling rules, venting prohibition, leak rate requirements, recordkeeping, and recovery procedures by system type.

Refrigerant Crossref

R-22 to R-410A to R-454B transition guidance. A2L flammability requirements, detector needs, charge-by-weight procedures, and retrofit options for legacy systems.

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Fault Codes

Equipment fault codes across Carrier, Trane, Lennox, Goodman, Daikin, Rheem, York, Mitsubishi, and LG. Most likely cause first -- not a list of 12 possibilities.

Charge Verification

Superheat method for fixed orifice systems, subcooling for TXV systems. Target values, what deviations indicate, and TXV hunting diagnosis.

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Combustion & Gas

Gas furnace ignition systems, heat exchanger inspection, combustion analysis, gas valve diagnosis, and venting requirements by efficiency rating and BTU.

Controls & Wiring

Thermostat wiring, low voltage circuit diagnosis, communicating systems -- Carrier Infinity, Trane ComfortLink, Lennox iComfort, Ecobee, and Nest compatibility.

The refrigerant transition

R-454B is here. Sunny knows the whole picture.

The industry is mid-transition and every tech needs to know where each refrigerant stands. Sunny has the full crossref, the A2L safety requirements, and the service procedures for every refrigerant your team will encounter.

A2L flammability requirements -- detector specs, ventilation, handling procedures.
Charge by weight -- Sunny gives the exact procedure for each refrigerant type.
Retrofit options -- when R-22 equipment can be retrofitted and with what.
Recovery requirements -- active vs passive, system pressure limits by refrigerant.
Refrigerant status at a glance

Where everything stands

Ask Sunny about any refrigerant -- status, handling, crossref.

R-454B New standard — A2L
R-410A No new equipment 2025+
R-32 Mini-splits — A2L
R-22 Phased out — reclaim only
R-448A / R-449A Commercial retrofit
Pricing

Simple pricing. Built for the trade.

Billed monthly, quarterly, or annually. Every seat included.

Pro
For the independent operator. One user, full Sunny power.
$79/mo
1 user
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EPA 608 -- guru level
Refrigerant crossref and R-454B
All major brands -- Carrier to Mitsubishi
Superheat and subcooling calc
Home Assistant integration
Voice and text -- 6 languages
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Advanced
For the growing team. Multiple seats, deeper integration.
$149/mo
Up to 5 users
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EPA 608 -- guru level
Refrigerant crossref and R-454B
All major brands -- Carrier to Mitsubishi
Superheat and subcooling calc
Home Assistant integration
Voice and text -- 6 languages
ProActive
For enterprise operations, multi-location businesses, and private label licensing.
Custom pricing
Tailored to your operation
Custom · dedicated onboarding included
Get in touch →
EPA 608 -- guru level
Refrigerant crossref and R-454B
All major brands -- Carrier to Mitsubishi
Superheat and subcooling calc
Home Assistant integration
Voice and text -- 6 languages
Add-ons & integrations
Home Assistant
Included
Live thermostat and equipment data from your connected smart home systems
Weather Integration
Included
Live conditions for load calculations, equipment sizing, and service windows
Usage Safety Net
$24.99/mo
Unlimited usage when you hit your limit -- 50% off the $49.99 on-demand rate
QuickBooks Online
Add-on
Sync service tickets to QuickBooks
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Answers before the tech climbs back down.

14-day free trial. Works on any tablet. No setup fee.

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