Right-sized equipment
Every system starts with a room-by-room Manual J load calc. We pick equipment to match the result, not a rule of thumb.
Tailored HVAC designs for your custom home.
Designed to head off change orders and mid-build redesign, with an engineer who answers.
Stamped, right-sized HVAC design and Title 24 from one office, so you can show clients the numbers and submit a set built for plan check.
- Equipment, duct runs, and clearances worked out on paper, so there's less to redesign mid-build.
- Title 24 from the same office, so the mechanical sheets and the energy report agree.
- Plan check questions go straight to the engineer who did the work.
Fixed fee, quoted from your plans. Southern California office, projects statewide.
Photo: finished custom hometo shoot
Sized room-by-roomEvery system starts with a Manual J load calc, never a rule of thumb.
Design and Title 24, one officeOne set of numbers on the sheets and in the energy report.
Designed with install in mindClearances and runs worked out before the framer shows up.
What your client gets
A custom home deserves a custom system.
Most houses get equipment picked by square footage. We calculate the house first, then pick equipment to match. Here's what that's designed to do.
Comfort, designed in
Equipment that fits the load is designed to run longer, steadier cycles. Room-by-room loads and duct design are how we design for even temperatures.
Less wasted energy
A system sized to the load is designed to use less energy than one that's oversized. We don't promise a number on your bill. That depends on the house, the weather, and how you live in it.
Designed to the energy code
Heat pump systems designed to the California Energy Code in effect for your permit application, with the compliance numbers in the Title 24 report, so the energy report matches the equipment.
Packages
Four ways to work with us.
Each is a fixed fee, quoted from your plans. Send them and we come back with a number, not an hourly estimate.
Manual J
A room-by-room Manual J load calculation for each system, with the report for your permit set. A good fit when a designer or contractor is handling the rest.
Fixed feeDetails
Manual J, S, and D
Manual J load calc, Manual S equipment selection, Manual D duct design or room airflows for your contractor's layout, ventilation and exhaust, and equipment schedules, stamped by a licensed California mechanical engineer. Exact scope is in your proposal. Space and clearances shown early for the architect and framers. Add the indoor air quality level: balanced ventilation, MERV 13 to 16 filtration, and air sensing with a smoke mode.
Fixed feeDetails
Residential energy compliance
Energy compliance for new homes and additions, with the CBECC-Res model and the CF1R for your permit set. Modeled to the California Energy Code in effect for your permit application.
Fixed feeDetails
One office, one set of numbers
One office handles the HVAC design and the Title 24 report, so both use the same loads and the same equipment. One point of contact, fewer mismatches between the sheets and the report.
Fixed feeDetails
Light commercial? Ask. We'll tell you straight whether it's a fit.
How it works
Three steps, little effort from you.
Send plans
Send the plans and a few basics. We come back with questions only when we need them.
We calculate and design
We run the load calc, pick equipment to match, and design the ducts, ventilation, and Title 24 model.
You get a stamped set
A stamped set and a signed Title 24 report. Plan check questions go straight to the engineer.
Why Strome
We do the detail so the field doesn't.
Space and clearances on the drawings early.
Before the load calc was finished on a recent two-building project, the architect had a space and clearance reservation for every outdoor unit, fan coil, and equipment closet.
One office for HVAC and Title 24.
An architect we had already worked with asked us to add Title 24 to a project already in design, so the energy report would use the same loads and equipment as the HVAC design.
You talk to the engineer.
The engineer who runs the load calc and picks the equipment is the one who answers your email. Every package is reviewed by a licensed California mechanical engineer who practices in HVAC.
About the firm
Built from a personal need.
Strome started with a house: the goal was a home that was comfortable to live in, and the discovery that the HVAC on many residential plans is sized by rule of thumb and drawn by nobody.
A custom home is engineered everywhere else. We give the mechanical system the same care: calculate the house first, choose equipment to match, show the numbers, and have every package reviewed by a licensed California mechanical engineer who practices in HVAC. The story
Send us your plans.
A PDF of the architectural set is enough to start. We reply by email with questions, if any, and a fixed fee.