Frequently Asked
Questions

Yes. When the slab's radiant piping fails, most Terra Linda owners retire it in place and switch to zoned ductless heat pumps u2014 heating and cooling from one system with no slab demolition. If your radiant loop is still sound, we'll tell you that too, and quote a maintenance path instead.

With ductless mini-splits. Wall- or ceiling-mounted indoor heads serve each zone through a small lineset penetration, so no ducts, soffits, or dropped ceilings are needed. As a Mitsubishi Electric Diamond Contractor Elite, Enviro installs the equipment most Eichler retrofits in Marin are built around.

MCE Clean Energy's rebate u2014 up to $400 per 500 square feet plus a $2,000 bonus (verified July 2026) u2014 applies in Terra Linda when the project is installed by a contractor on MCE's participating list and the home hasn't added solar or EV charging within 12 months. Ask us about current eligibility when you request an estimate.

No. Modern outdoor units are compact and quiet, and we place them off the street-facing elevation with clean lineset routing. Indoors, low-profile wall and ceiling cassettes keep the post-and-beam lines and glass walls untouched.

Yes u2014 Terra Linda is inside the City of San Rafael, so HVAC change-outs are permitted through the city. Enviro handles the permit paperwork and final inspection as part of every installation.

Yes. Ductless mini-split heads mount on walls or ceilings and connect to the outdoor unit through a small lineset penetration u2014 no duct chases, no plaster demolition. Multi-zone systems cover a whole Victorian floor plan while each room keeps its own setpoint.

Placement matters on contributing historic properties u2014 exterior equipment is best kept off street-facing elevations and screened tastefully. We design placements that respect the streetscape and handle City of Petaluma permitting as part of the job.

Most owners step up to either a ductless heat pump system (heating plus cooling, no ducts needed) or, where ducting exists or can be added discreetly, a modern high-efficiency furnace or ducted heat pump. We'll show you both paths priced side by side.

Fewer hours than Santa Rosa, but yes u2014 heat waves do reach the river valley, and a heat pump's cooling comes essentially bundled with its efficient winter heating. Filtration for wildfire-smoke days is often the bigger year-round win.

Sometimes yes, sometimes not without an upgrade u2014 pre-war services vary widely. We evaluate the panel during the estimate and design around its real capacity, flagging any electrical work before you commit rather than mid-install.

Yes. The Oakmont Village Association's Protective Restrictions require written Architectural Committee approval before exterior work u2014 explicitly including installation of exterior air conditioners. If your home is in one of the 36 sub-associations, its board typically reviews first. Enviro prepares the placement and screening details for your application.

It depends on the failure, the repair cost, and how the system matches your plans for the home. We give you both numbers side by side, and if another company already recommended replacement, our free second opinion will confirm it or save you the expense u2014 no pressure either way.

With whole-home filtration matched to the system u2014 a high-MERV media filter or air purifier at the air handler u2014 plus a maintained blower that can run continuously on smoky days. Single-story Oakmont floor plans respond especially well to this upgrade.

Yes. Modern variable-speed condensers and ductless heat pumps run dramatically quieter than the equipment they replace u2014 a real courtesy to neighbors in Oakmont's compact clusters, and a factor the Architectural Committee weighs on placement.

Our CARE membership covers seasonal tune-ups, member discounts, and priority scheduling u2014 one plan that keeps heating and cooling handled year-round with visits booked around your calendar, not ours.

County. Boyes Hot Springs, Fetters Hot Springs, Agua Caliente, and El Verano are unincorporated, so HVAC permits go through Permit Sonoma. Enviro files with the county and schedules the inspection u2014 you don't have to sort out the jurisdiction yourself.

Yes u2014 a single-zone ductless heat pump is usually the right-sized answer for a compact cottage, and multi-zone systems cover larger or added-onto homes. You get efficient heating and cooling from one system without cutting duct chases into a small house.

Yes. SCP's rebates require a finalized permit and an application within 90 days of completion u2014 an unpermitted job is ineligible. We build the Permit Sonoma filing into every Springs project so the rebate stays on the table.

With whole-home filtration at the air handler, or filtration built into a ductless system, plus a maintained blower that can run continuously when the air outside is bad. We size filtration to the home so clean air doesn't come at the cost of airflow.

Both u2014 the Highway 12 corridor through Boyes Hot Springs and Agua Caliente is on our regular Sonoma Valley routes from Rohnert Park, along with the Plaza area and the wider valley. We've served Sonoma Valley homes since 2008.

Because builder-grade equipment approaching ten years old is entering its first failure window, and many warranties require documented annual maintenance to pay claims. A tune-up now is cheaper than a peak-season breakdown later u2014 and it protects the paperwork trail.

We're based at 175 Cascade Court in Rohnert Park, minutes from the University District u2014 this is the closest neighborhood to our shop. Same-day service is prioritized for CARE members, and proximity means district calls slot into our routes easily.

Usually yes. Tight, energy-code-current homes respond strongly to smart scheduling and staging u2014 the thermostat is the cheapest efficiency upgrade these houses can buy, and we configure it to your actual schedule rather than factory defaults.

That's the honest fork: on a roughly ten-year-old builder unit, a major repair can approach real replacement value. We price both paths u2014 including the Sonoma Clean Power $1,000 heat pump rebate where it applies (verified July 2026) u2014 and let the numbers decide.

All of it u2014 the lettered sections, SOMO Village, the Country Club area, and every neighborhood in between. Rohnert Park has been our home base since 2008.

Yes. Systems installed in 2018u20132021 are five to eight years old, which is when drains clog, charges drift, and small faults become compressor-killers. Many manufacturer warranties also require documented annual maintenance to stay valid, so a tune-up protects both comfort and coverage.

Upgrade filtration at the air handler u2014 a properly sized high-MERV media filter or air purifier u2014 and keep the system maintained so it can run on smoky days without strain. Rebuilt Coffey Park homes are tight, which makes whole-home filtration especially effective.

Sonoma Clean Power pays $1,000 for a qualifying heat pump heating-and-cooling system (verified July 2026), with enhanced rebates up to $10,000 for CARE/FERA-enrolled customers. A finalized City of Santa Rosa permit is required u2014 Enviro pulls it and files the rebate paperwork within SCP's 90-day window.

Because most of the neighborhood was rebuilt in the same 2018u20132021 window after the Tubbs Fire, its equipment will hit each wear milestone together. When the first hot spell exposes ten-year-old capacitors street by street, repair calendars fill fast u2014 maintained systems skip that queue.

Yes u2014 Coffey Park, and all of northwest Santa Rosa around it, is a short drive up Highway 101 from our Rohnert Park shop at 175 Cascade Court. We've served Santa Rosa continuously since 2008.

Salt-laden moisture off the lagoons and San Pablo Bay corrodes outdoor coil fins, which cuts efficiency first and equipment life second. Coastal-rated or coated coils, smart placement, and seasonal coil rinsing measurably slow the process u2014 all things we build into waterfront installs.

Marin County. The community is unincorporated, so mechanical and building permits run through the county's Community Development Agency rather than Novato City Hall. Enviro files county permits as part of every Bel Marin Keys project.

Yes u2014 Bel Marin Keys is in MCE territory. Verified July 2026, MCE pays up to $400 per 500 square feet plus a $2,000 bonus on qualifying heat pump systems, installed by a contractor on MCE's participating list, with a 12-month no-new-solar/EV rule. Ask us about current eligibility when you request an estimate.

The BMKCSD is a public district, not an HOA, but parcels carry recorded CC&Rs that can affect exterior placement. We review your parcel's requirements during the estimate and design condenser placement to fit them.

Often, yes. Sealing leaky original ductwork, correcting airflow, and tuning the charge recovers real capacity in mid-century homes. When replacement is the honest answer, we'll show you why with measurements u2014 not adjectives.